Below given are the list of Linux commands which starts with A. We have provided a breif description for each command. To know more about each command and its usage try the following.
man command-name
Example:
man accept
A accept - accept a connection on a socket
accept - accept a new connection on a socket
access - check user's permissions for a file
access - determine accessibility of a file
access.conf [access] - the login access control table file
aconnect - ALSA sequencer connection manager
acpid - Advanced Configuration and Power Interface event daemon
acpid - ACPI Event Daemon
addr2line - convert addresses into file names and line numbers
addresses - Dumps the Palm Address Book entries to STDOUT in a simple format
agetty - alternative Linux getty
alsactl - advanced controls for ALSA soundcard driver
amidi - read from and write to ALSA RawMIDI ports
amixer - command-line mixer for ALSA soundcard driver
anacron - runs commands periodically
anacron - A cron-like program that can run jobs lost during downtime.
aplay - command-line sound recorder and player for ALSA soundcard driver
aplaymidi - play Standard MIDI Files
apm - interface with the APM subsystem
apm - Alliance ProMotion video driver
apmd - Advanced Power Management (APM) daemon
apmd - Advanced Power Management (APM) BIOS utilities for laptops.
apropos - search the whatis database for strings
ar - create, modify, and extract from archives
ar - create and maintain library archives
arch - print machine architecture
arecord [aplay] - command-line sound recorder and player for ALSA soundcard driver
arecordmidi - record Standard MIDI Files
arp - Linux ARP kernel module
arp - manipulate the system ARP cache
AS [as] - the portable GNU assembler
at - queue, examine or delete jobs for later execution
at - execute commands at a later time
at - Job spooling tools.
at-spi - Assistive Technology Service Provider Interface
at.allow [at] - determine who can submit jobs via at or batch
at.deny [at] - determine who can submit jobs via at or batch
atd - run jobs queued for later execution
atq - queue, examine or delete jobs for later execution
atrm - queue, examine or delete jobs for later execution
Bbadblocks - search a device for bad blocks
basename -strip directory and suffix from filenames
basename - return non-directory portion of a pathname
basename - Parse pathname components
basename - return the last component of a pathname
bash - GNU Bourne-Again SHell
bash - The GNU
Bourne Again shell (bash) version 3.1.
bash [builtins] - bash built-incommands, see bash(1)
batch - schedule commands to be executedin a batch queue
batch [at] - queue, examine or delete jobs for laterexecution
bc - An arbitrary precision calculator language
bc - arbitrary-precision arithmetic language
bc - GNU's bc (a numeric processing language) and dc (a calculator).
bzcmp
[bzdiff] - compare bzip2 compressed files
bzdiff -compare bzip2 compressed files
bzgrep - search possibly bzip2 compressed files for a regular expression
bzip2 - a block-sorting file compressor, v1.0.3
bzip2 - A file compression utility.
bzip2-libs - Libraries for applications using bzip2
bzless
[bzmore] - file perusal filter for crt viewing of bzip2 compressed text
bzmore - file perusal filter for crt viewing of bzip2 compressed text
Bc++filt (1) - Demangle C++ and Java symbols
cal (1) - displays a calendar
cal (1p) - print a calendar
cat (1) - concatenate files and print on the standard output
cat (1p) - concatenate and print files
cdda2wav (1) - a sampling utility that dumps CD audio data into wav sound files
cdda2wav (rpm) - A utility for sampling/copying .wav files from digital audio CDs.
cdparanoia (rpm) - A Compact Disc Digital Audio (CDDA) extraction tool (or ripper).
cdparanoia-libs (rpm) - Libraries for libcdda_paranoia (Paranoia III).
cdrdao (1) - writes audio CD-Rs in disc-at-once mode
cdrdao (rpm) - Writes audio CD-Rs in disk-at-once (DAO) mode.
cdrecord (1) - record audio or data Compact Disks or Digital Versatile Disks from a master
cdrecord (rpm) - A command line CD/DVD recording program.
chage (1) - change user password expiry information
chattr (1) - change file attributes on a Linux second extended file system
chfn (1) - change your finger information
chgrp (1) - change group ownership
chgrp (1p) - change the file group ownership
chkconfig (8) - updates and queries runlevel information for system services
chkconfig (rpm) - A system tool for maintaining the /etc/rc*.d hierarchy.
chmod (1) - change file access permissions
chmod (1p) - change the file modes
chmod (2) - change permissions of a file
chmod (3p) - change mode of a file
chown (1) - change file owner and group
chown (1p) - change the file ownership
chown (2) - change ownership of a file
chown (3p) - change owner and group of a file
chpasswd (8) - update passwords in batch mode
chroot (1) - run command or interactive shell with special root directory
chroot (2) - change root directory
chrt (1) - manipulate real-time attributes of a process
chsh (1) - change your login shell
chvt (1) - change foreground virtual terminal
cksum (1) - checksum and count the bytes in a file
cksum (1p) - write file checksums and sizes
clear (1) - clear the terminal screen
cmp (1) - compare two files
cmp (1p) - compare two files
col (1) - filter reverse line feeds from input
colcrt (1) - filter nroff output for CRT previewing
colrm (1) - remove columns from a file
column (1) - columnate lists
comm (1) - compare two sorted files line by line
comm (1p) - select or reject lines common to two files
Compress::Zlib (3pm) - Interface to zlib compression library
cp (1) - copy files and directories
cp (1p) - copy files
cpio (1) - copy files to and from archives
cpio (rpm) - A GNU archiving program.
cpio.h [cpio] (0p) - cpio archive values
cpp (1) - The C Preprocessor
cpp (rpm) - The C Preprocessor.
crontab (1) - maintain crontab files for individual users (ISC Cron V4.1)
crontab (1p) - schedule periodic background work
crontab (5) - tables for driving cron (ISC Cron V4.1)
csplit (1) - split a file into sections determined by context lines
csplit (1p) - split files based on context
ctags (1p) - create a tags file (DEVELOPMENT, FORTRAN)
cupsd (8) - common unix printing system daemon
cupsd.conf [cupsd] (5) - server configuration file for cups
cut (1) - remove sections from each line of files
cut (1p) - cut out selected fields of each line of a file
D date (1) - print or set the system date and time
date (1p) - write the date and time
dd (1) - convert and copy a file
dd (1p) - convert and copy a file
deallocvt (1) - deallocate unused virtual consoles
debugfs (8) - ext2/ext3 file system debugger
depmod (8) - program to generate modules.dep and map files
depmod.conf [depmod] (5) - Configuration file/directory for depmod
depmod.d [depmod] (5) - Configuration file/directory for depmod
devdump [isoinfo] (8) - Utility programs for dumping and verifying iso9660 images
df (1) - report file system disk space usage
df (1p) - report free disk space
diff (1) - find differences between two files
diff (1p) - compare two files
diff-jars (1) - output the differences between two JAR files
diff3 (1) - find differences between three files
dig (1) - DNS lookup utility
dir (1) - list directory contents
dircolors (1) - color setup for ls
dirname (1) - strip non-directory suffix from file name
dirname (1p) - return the directory portion of a pathname
dirname (3p) - report the parent directory name of a file pathname
dirname [basename] (3) - Parse pathname components
dmesg (8) - print or control the kernel ring buffer
dnsdomainname [hostname] (1) - show the system's DNS domain name
doexec (1) - run an executable with an arbitrary argv[0]
domainname [hostname] (1) - show or set the system's NIS/YP domain name
dosfsck (8) - check and repair MS-DOS file systems
du (1) - estimate file space usage
du (1p) - estimate file space usage
dump (8) - ext2/3 filesystem backup
dump (rpm) - Programs for backing up and restoring ext2/ext3 filesystems
dumpe2fs (8) - dump ext2/ext3 filesystem information
dumpkeys (1) - dump keyboard translation tables
E e2label (8) - Change the label on an ext2/ext3 filesystem
echo (1) - display a line of text
echo (1p) - write arguments to standard output
echo [builtins] (1) - bash built-in commands, see bash(1)
edquota (8) - edit user quotas
egrep [grep] (1) - print lines matching a pattern
eject (1) - eject removable media
eject (rpm) - A program that ejects removable media using software control.
enable [builtins] (1) - bash built-in commands, see bash(1)
Env (3pm) - perl module that imports environment variables as scalars or arrays
env (1) - run a program in a modified environment
env (1p) - set the environment for command invocation
envsubst (1) - substitutes environment variables in shell format strings
esd (1) - The Enlightened Sound Daemon
esd-config (1) - The Enlightened Sound Daemon
esd-config (1) - The Enlightened Sound Daemon
esdcat (1) - The Enlightened Sound Daemon
esdctl (1) - The Enlightened Sound Daemon
esddsp (1) - attempt to reroute audio device to esd
esddsp [esdplay] (1) - attempt to reroute audio device to esd
esdmon (1) - The Enlightened Sound Daemon
esdrec (1) - The Enlightened Sound Daemon
esdsample (1) - The Enlightened Sound Daemon
ex (1p) - text editor
expand (1) - convert tabs to spaces
expand (1p) - convert tabs to spaces
e2label (8) - Change the label on an ext2/ext3 filesystem
echo (1) - display a line of text
echo (1p) - write arguments to standard output
echo [builtins] (1) - bash built-in commands, see bash(1)
edquota (8) - edit user quotas
egrep [grep] (1) - print lines matching a pattern
eject (1) - eject removable media
eject (rpm) - A program that ejects removable media using software control.
enable [builtins] (1) - bash built-in commands, see bash(1)
Env (3pm) - perl module that imports environment variables as scalars or arrays
env (1) - run a program in a modified environment
env (1p) - set the environment for command invocation
envsubst (1) - substitutes environment variables in shell format strings
esd (1) - The Enlightened Sound Daemon
esd-config (1) - The Enlightened Sound Daemon
esd-config (1) - The Enlightened Sound Daemon
esdcat (1) - The Enlightened Sound Daemon
esdctl (1) - The Enlightened Sound Daemon
esddsp (1) - attempt to reroute audio device to esd
esddsp [esdplay] (1) - attempt to reroute audio device to esd
esdmon (1) - The Enlightened Sound Daemon
esdrec (1) - The Enlightened Sound Daemon
esdsample (1) - The Enlightened Sound Daemon
ex (1p) - text editor
expand (1) - convert tabs to spaces
expand (1p) - convert tabs to spaces
expr (1) - evaluate expressions
expr (1p) - evaluate arguments as an expression
F factor (1) - factor numbers
false (1) - do nothing, unsuccessfully
false (1p) - return false value
fc-cache (1) - build font information cache files
fc-list (1) - list available fonts
fdformat (8) - Low-level formats a floppy disk
fdisk (8) - Partition table manipulator for Linux
fetchmail (1) - fetch mail from a POP, IMAP, ETRN, or ODMR-capable server
fetchmail (rpm) - A remote mail retrieval and forwarding utility
fgconsole (1) - print the number of the active VT
fgrep [grep] (1) - print lines matching a pattern
File::Basename (3pm) - Parse file paths into directory, filename and suffix
File::Compare (3pm) - Compare files or filehandles
File::Copy (3pm) - Copy files or filehandles
File::DosGlob (3pm) - DOS like globbing and then some
File::Find (3pm) - Traverse a directory tree
File::Glob (3pm) - Perl extension for BSD glob routine
File::Path (3pm) - create or remove directory trees
File::Spec (3pm) - portably perform operations on file names
File::Spec::Cygwin (3pm) - methods for Cygwin file specs
File::Spec::Epoc (3pm) - methods for Epoc file specs
File::Spec::Functions (3pm) - portably perform operations on file names
File::Spec::Mac (3pm) - File::Spec for Mac OS (Classic)
File::Spec::OS2 (3pm) - methods for OS/2 file specs
File::Spec::Unix (3pm) - File::Spec for Unix, base for other File::Spec modules
File::Spec::VMS (3pm) - methods for VMS file specs
File::Spec::Win32 (3pm) - methods for Win32 file specs
File::Temp (3pm) - return name and handle of a temporary file safely
File::stat (3pm) - by-name interface to Perl's built-in stat() functions
file (1) - determine file type
file (1p) - determine file type
file (rpm) - A utility for determining file types.
file-roller (rpm) - File Roller is a tool for viewing and creating archives
find (1) - search for files in a directory hierarchy
find (1p) - find files
finger (1) - user information lookup program
finger (rpm) - The finger client.
fmt (1) - simple optimal text formatter
fold (1) - wrap each input line to fit in specified width
fold (1p) - filter for folding lines
formail (1) - mail (re)formatter
free (1) - Display amount of free and used memory in the system
free (3p) - free allocated memory
free [malloc] (3) - Allocate and free dynamic memory
fsck (8) - check and repair a Linux file system
ftp (1) - Internet file transfer program
ftp (rpm) - The standard UNIX FTP (File Transfer Protocol) client.
fuser (1) - identify processes using files or sockets
fuser (1p) - list process IDs of all processes that have one or more files open
Ggawk (1) - pattern scanning and processing language
gawk (rpm) - The GNU version of the awk text processing utility.
gawk [pgawk] (1) - pattern scanning and processing language
getent (1) - get entries from administrative database
getkeycodes (8) - print kernel scancode-to-keycode mapping table
gpasswd (1) - administer the /etc/group file
gpg (1) - encryption and signing tool
gpg-pubkey (rpm) - gpg(CentOS-5 Key (CentOS 5 Official Signing Key) <centos-5-key@centos.org>)
gpg-pubkey (rpm) - gpg(Stu Tomlinson <stu@nosnilmot.com>)
gpgv (1) - signature verification tool
gpm (8) - a cut and paste utility and mouse server for virtual consoles
gpm (rpm) - A mouse server for the Linux console.
gpm-root (1) - a default handler for gpm, used to draw menus on the root window
gprof (1) - display call graph profile data
grep (1) - print lines matching a pattern
grep (1p) - search a file for a pattern
grep (rpm) - The GNU versions of grep pattern matching utilities.
groff (1) - front-end for the groff document formatting system
groff (7) - a short reference for the GNU roff language
groff (rpm) - A document formatting system.
groffer (1) - display groff files and man~pages on X and tty
groupadd (8) - create a new group
groupdel (8) - delete a group
groupmod (8) - modify a group
groups (1) - print the groups a user is in
grpck (8) - verify integrity of group files
grpconv [pwconv] (8) - convert to and from shadow passwords and groups
gs (1) - Ghostscript (PostScript and PDF language interpreter and previewer)
gunzip [gzip] (1) - compress or expand files
gzexe (1) - compress executable files in place
gzip (1) - compress or expand files
gzip (rpm) - The GNU data compression program.
Hhalt (8) - stop the system
hdparm (8) - get/set hard disk parameters
hdparm (rpm) - A utility for displaying and/or setting hard disk parameters.
head (1) - output the first part of files
head (1p) - copy the first part of files
hexdump (1) - ascii, decimal, hexadecimal, octal dump
host (1) - DNS lookup utility
host.conf [host] (5) - resolver configuration file
hostid (1) - print the numeric identifier for the current host
hostname (1) - show or set the system's host name
htdigest (1) - manage user files for digest authentication
hwclock (8) - query and set the hardware clock (RTC)
Iiconv (1) - Convert encoding of given files from one encoding to another
iconv (1p) - codeset conversion
iconv (3) - perform character set conversion
iconv (3p) - codeset conversion function
iconv.h [iconv] (0p) - codeset conversion facility
id (1) - print user identity
id (1p) - return user identity
ifconfig (8) - configure a network interface
info (1) - read Info documents
info (5) - readable online documentation
info (rpm) - A stand-alone TTY-based reader for GNU texinfo documentation.
init (8) - process control initialization
insmod (8) - simple program to insert a module into the Linux Kernel
install (1) - copy files and set attributes
install-catalog (8) - Manage a SGML or XML centralized catalog
install-datebook (1) - installs a new datebook entry onto your Palm handheld
install-expenses (1) - Install an expense record from various parameters and arguments passed at connection time
install-hinote (1) - installs a new Hi-Note entry onto your Palm handheld
install-info (1) - update info/dir entries
install-memo (1) - installs a new Memo Pad entry onto your Palm handheld
install-netsync (1) - reads or sets the Network Preferences information on a Palm Device
install-todo (1) - Updates the Palm ToDo list with one new entry
install-user (1) - reads or sets a Palm User and UserID on a Palm Device
ipcrm (1p) - remove an XSI message queue, semaphore set, or shared memory segment identifier
ipcrm (8) - remove a message queue, semaphore set or shared memory id
ipcs (1p) - report XSI interprocess communication facilities status
ipcs (8) - provide information on ipc facilities
iptables (8) - administration tool for IPv4 packet filtering and NAT
iptables (rpm) - Tools for managing Linux kernel packet filtering capabilities.
iptables-ipv6 (rpm) - IPv6 support for iptables.
iptables-restore (8) - Restore IP Tables
iptables-save (8) - Save IP Tables
iptables-restore (8) - Restore IP Tables
iptables-save (8) - Save IP Tables
isodump (5) - format of IEEE 1394 isochronous packets dump file
isodump [isoinfo] (8) - Utility programs for dumping and verifying iso9660 images
isoinfo (8) - Utility programs for dumping and verifying iso9660 images
isosize (8) - outputs the length of a iso9660 file system
isovfy [isoinfo] (8) - Utility programs for dumping and verifying iso9660 images
Jjoin (1) - join lines of two files on a common field
join (1p) - relational database operator
Kkbd_mode (1) - report or set the keyboard mode
kbdrate (8) - reset the keyboard repeat rate and delay time
kill (1) - terminate a process
kill (1p) - terminate or signal processes
kill (2) - send signal to a process
kill (3p) - send a signal to a process or a group of processes
kill [builtins] (1) - bash built-in commands, see bash(1)
killall (1) - kill processes by name
klogd (8) - Kernel Log Daemon
kudzu (8) - detects and configures new and/or changed hardware on a system
kudzu (rpm) - The CentOS hardware probing tool.
Llast (1) - show listing of last logged in users
lastb [last] (1) - show listing of last logged in users
lastlog (8) - reports the most recent login of all users or of a given user
ld (1) - The GNU linker
ld (8) - linux.so* - dynamic linker/loader
ld.so [ld] (8) - linux.so* - dynamic linker/loader
ldd (1) - print shared library dependencies
less (1) - opposite of more
less (3pm) - perl pragma to request less of something from the compiler
less (rpm) - A text file browser similar to more, but better.
lesskey (1) - specify key bindings for less
lftp (1) - Sophisticated file transfer program
lftp (rpm) - A sophisticated file transfer program
lftpget (1) - get a file with lftp(1)
link (1) - call the link function to create a link to a file
link (1p) - call link function
link (2) - make a new name for a file
link (3p) - link to a file
ln (1) - make links between files
ln (1p) - link files
loadkeys (1) - load keyboard translation tables
Locale::Constants (3pm) - constants for Locale codes
Locale::Country (3pm) - ISO codes for country identification (ISO 3166)
Locale::Currency (3pm) - ISO three letter codes for currency identification (ISO 4217)
Locale::Language (3pm) - ISO two letter codes for language identification (ISO 639)
Locale::Maketext (3pm) - framework for localization
Locale::Script (3pm) - ISO codes for script identification (ISO 15924)
locale (1) - Get locale - specific information
locale (1p) - get locale - specific information
locale (3pm) - Perl pragma to use and avoid POSIX locales for built-in operations
locale (5) - Describes a locale definition file
locale (7) - Description of multi-language support
locale.h [locale] (0p) - category macros
locate (1) - find files by name
lockfile (1) - conditional semaphore-file creator
logger (1) - a shell command interface to the syslog(3) system log module
logger (1p) - log messages
login (1) - sign on
login (3) - write utmp and wtmp entries
login.defs [login] (5) - shadow password suite configuration
logname (1) - print user's login name
logname (1p) - return the user's login name
logrotate (8) - rotates, compresses, and mails system logs
logrotate (rpm) - Rotates, compresses, removes and mails system log files.
look (1) - display lines beginning with a given string
look [Search::Dict] (3pm) - search for key in dictionary file
losetup (8) - set up and control loop devices
lpadmin (8) - configure cups printers and classes
lpinfo (8) - show available devices or drivers
lpmove (8) - move a job or all jobs to a new destination
lpq [lpq-cups] (1) - show printer queue status
lpr [lpr-cups] (1) - print files
lprm [lprm-cups] (1) - cancel print jobs
lpstat [lpstat-cups] (1) - print cups status information
ls (1) - list directory contents
ls (1p) - list directory contents
lsattr (1) - list file attributes on a Linux second extended file system
lspci (8) - list all PCI devices
lsmod (8) - program to show the status of modules in the Linux Kernel
lsusb (8) - list USB devices
MM4 [m4] (1) - manual page for M4 1.4.5
m4 (1p) - macro processor (DEVELOPMENT)
m4 (rpm) - The GNU macro processor.
Mail::SpamAssassin (3pm) - Spam detector and markup engine
Mail::SpamAssassin::AICache (3pm) - provide access to cached information for ArchiveIterator
Mail::SpamAssassin::ArchiveIterator (3pm) - find and process messages one at a time
Mail::SpamAssassin::AutoWhitelist (3pm) - auto-whitelist handler for SpamAssassin
Mail::SpamAssassin::Bayes (3pm) - determine spammishness using a Bayesian classifier
Mail::SpamAssassin::BayesStore (3pm) - Bayesian Storage Module
Mail::SpamAssassin::BayesStore::MySQL (3pm) - MySQL Specific Bayesian Storage Module Implementation
Mail::SpamAssassin::BayesStore::PgSQL (3pm) - PostgreSQL Specific Bayesian Storage Module Implementation
Mail::SpamAssassin::BayesStore::SQL (3pm) - SQL Bayesian Storage Module Implementation
Mail::SpamAssassin::Client (3pm) - Client for spamd Protocol
Mail::SpamAssassin::Conf (3pm) - SpamAssassin configuration file
Mail::SpamAssassin::Conf::LDAP (3pm) - load SpamAssassin scores from LDAP database
Mail::SpamAssassin::Conf::Parser (3pm) - parse SpamAssassin configuration
Mail::SpamAssassin::Conf::SQL (3pm) - load SpamAssassin scores from SQL database
Mail::SpamAssassin::DnsResolver (3pm) - DNS resolution engine
Mail::SpamAssassin::Logger (3pm) - SpamAssassin logging module
Mail::SpamAssassin::Logger::File (3pm) - log to file
Mail::SpamAssassin::Logger::Stderr (3pm) - log to standard error
Mail::SpamAssassin::Logger::Syslog (3pm) - log to syslog
Mail::SpamAssassin::Message (3pm) - decode, render, and hold an RFC-2822 message
Mail::SpamAssassin::Message::Metadata (3pm) - extract metadata from a message
Mail::SpamAssassin::Message::Node (3pm) - decode, render, and make available MIME message parts
Mail::SpamAssassin::PerMsgLearner (3pm) - per-message status (spam or not-spam)
Mail::SpamAssassin::PerMsgStatus (3pm) - per-message status (spam or not-spam)
Mail::SpamAssassin::PersistentAddrList (3pm) - persistent address list base class
Mail::SpamAssassin::Plugin (3pm) - SpamAssassin plugin base class
Mail::SpamAssassin::Plugin::AWL (3pm) - Normalize scores via auto-whitelist
Mail::SpamAssassin::Plugin::AccessDB (3pm) - check message against Access Database
Mail::SpamAssassin::Plugin::AutoLearnThreshold (3pm) - threshold-based discriminator for Bayes auto-learning
Mail::SpamAssassin::Plugin::DCC (3pm) - perform DCC check of messages
Mail::SpamAssassin::Plugin::DKIM (3pm) - perform DKIM verification tests
Mail::SpamAssassin::Plugin::DomainKeys (3pm) - perform DomainKeys verification tests
Mail::SpamAssassin::Plugin::Hashcash (3pm) - perform hashcash verification tests
Mail::SpamAssassin::Plugin::Pyzor (3pm) - perform Pyzor check of messages
Mail::SpamAssassin::Plugin::Razor2 (3pm) - perform Razor check of messages
Mail::SpamAssassin::Plugin::ReplaceTags (3pm) - tags for SpamAssassin rules
Mail::SpamAssassin::Plugin::SPF (3pm) - perform SPF verification tests
Mail::SpamAssassin::Plugin::SpamCop (3pm) - perform SpamCop reporting of messages
Mail::SpamAssassin::Plugin::TextCat (3pm) - TextCat language guesser
Mail::SpamAssassin::Plugin::WhiteListSubject (3pm) - whitelist by Subject header
Mail::SpamAssassin::PluginHandler (3pm) - SpamAssassin plugin handler
Mail::SpamAssassin::SQLBasedAddrList (3pm) - SpamAssassin SQL Based Auto Whitelist
Mail::SpamAssassin::SubProcBackChannel (3pm) - back-channel for communication between a master and multiple slave processes
Mail::SpamAssassin::Timeout (3pm) - safe, reliable timeouts in perl
Mail::SpamAssassin::Util (3pm) - utility functions
Mail::SpamAssassin::Util::Progress (3pm) - Progress bar support for SpamAssassin
mail (1) - send and receive mail
mailq (1) - print the mail queue
mailstats (8) - display mail statistics
mailto.conf [mailto] (5) - configuration file for cups email notifier
make (1) - GNU make utility to maintain groups of programs
make (1p) - maintain, update, and regenerate groups of programs (DEVELOPMENT)
make (rpm) - A GNU tool which simplifies the build process for users.
makemap (8) - create database maps for sendmail
man (1) - format and display the on-line manual pages
man (1p) - display system documentation
man (7) - macros to format man pages
man (rpm) - A set of documentation tools: man, apropos and whatis.
man-pages (rpm) - Man (manual) pages from the Linux Documentation Project.
man.config [man] (5) - configuration data for man
mattrib (1) - change MSDOS file attribute flags
mbadblocks (1) - tests a floppy disk, and marks the bad blocks in the FAT
mcat (1) - dump raw disk image
mcd (1) - change MSDOS directory
mcopy (1) - copy MSDOS files to/from Unix
md5sum (1) - compute and check MD5 message digest
mdeltree (1) - recursively delete an MSDOS directory and its contents
mdir (1) - display an MSDOS directory
mdu (1) - display the amount of space occupied by an MSDOS directory
mesg (1) - control write access to your terminal
mesg (1p) - permit or deny messages
mformat (1) - add an MSDOS filesystem to a low-level formatted floppy disk
minfo (1) - print the parameters of a MSDOS filesystem
mkdir (1) - make directories
mkdir (1p) - make directories
mkdir (2) - create a directory
mkdir (3p) - make a directory
mkdosfs (8) - create an MS-DOS file system under Linux
mke2fs (8) - create an ext2/ext3 filesystem
mke2fs [mkfs] (8) - create an ext2/ext3 filesystem
mke2fs.conf [mke2fs] (5) - Configuration file for mke2fs
mkfifo (1) - make FIFOs (named pipes)
mkfifo (1p) - make FIFO special files
mkfifo (3) - make a FIFO special file (a named pipe)
mkfifo (3p) - make a FIFO special file
mkfs (8) - build a Linux file system
mkisofs (8) - create an hybrid ISO9660/JOLIET/HFS filesystem with optional Rock Ridge attributes
mkisofs (rpm) - Creates an image of an ISO9660 filesystem.
mklost+found (8) - create a lost+found directory on a mounted Linux second extended file system
mkmanifest (1) - makes list of file names and their DOS 8+3 equivalent
mknod (1) - make block or character special files
mknod (2) - create a special or ordinary file
mknod (3p) - make a directory, a special file, or a regular file
mkswap (8) - set up a Linux swap area
mktemp (1) - make temporary filename (unique)
mktemp (3) - make a unique temporary filename
mktemp (3p) - make a unique filename (LEGACY)
mktemp (rpm) - A small utility for safely making /tmp files.
mlabel (1) - make an MSDOS volume label
mmd (1) - make an MSDOS subdirectory
mmount (1) - mount an MSDOS disk
mmove (1) - move or rename an MSDOS file or subdirectory
modinfo (8) - program to show information about a Linux Kernel module
modprobe (8) - program to add and remove modules from the Linux Kernel
modprobe.conf [modprobe] (5) - Configuration file/directory for modprobe
modprobe.d [modprobe] (5) - Configuration file/directory for modprobe
more (1) - file perusal filter for crt viewing
more (1p) - display files on a page-by-page basis
mount (2) - mount and unmount filesystems
mount (8) - mount a file system
mount.cifs [mount] (8) - mount using the Common Internet File System (CIFS)
mount.nfs [mount] (8) - mount a Network File System
mount.nfs4 [mount] (8) - mount a Network File System
mpartition (1) - partition an MSDOS hard disk
mrd (1) - remove an MSDOS subdirectory
mren (1) - rename an existing MSDOS file
mshowfat (1) - shows FAT clusters allocated to file
mtools (1) - utilities to access DOS disks in Unix
mtools (rpm) - Programs for accessing MS-DOS disks without mounting the disks.
mtools.conf [mtools] (5) - mtools configuration files
mtoolstest (1) - tests and displays the configuration
mtype (1) - display contents of an MSDOS file
mv (1) - move (rename) files
mv (1p) - move files
mzip (1) - change protection mode and eject disk on Zip/Jaz drive
Nnamei (1) - follow a pathname until a terminal point is found
nameif (8) - name network interfaces based on MAC addresses
netstat (8) - Print network connections, routing tables, interface statistics, masquerade connections, and multicast memberships
newaliases (1) - rebuild the data base for the mail aliases file
newgrp (1) - log in to a new group
newgrp (1p) - change to a new group
newusers (8) - update and create new users in batch
nfsd (7) - special filesystem for controlling Linux NFS server
nfsstat (8) - list NFS statistics
nice (1) - run a program with modified scheduling priority
nice (1p) - invoke a utility with an altered nice value
nice (2) - change process priority
nice (3p) - change the nice value of a process
nm (1) - list symbols from object files
nm (1p) - write the name list of an object file (DEVELOPMENT)
nohup (1) - run a command immune to hangups, with output to a non-tty
nohup (1p) - invoke a utility immune to hangups
nslookup (1) - query Internet name servers interactively
nsupdate (8) - Dynamic DNS update utility
Oobjcopy (1) - copy and translate object files
objdump (1) - display information from object files
od (1) - dump files in octal and other formats
od (1p) - dump files in various formats
openvt (1) - start a program on a new virt
Ppasswd (1) - update a user's authentication tokens(s)
passwd (5) - password file
passwd (rpm) - The passwd utility for setting/changing passwords using PAM
passwd [sslpasswd] (1ssl) - compute password hashes
paste (1) - merge lines of files
paste (1p) - merge corresponding or subsequent lines of files
patch (1) - apply a diff file to an original
patch (1p) - apply changes to files
patch (rpm) - The GNU patch command, for modifying/upgrading files.
pathchk (1) - check whether file names are valid or portable
pathchk (1p) - check pathnames
perl (1) - Practical Extraction and Report Language
perl (rpm) - The Perl programming language
perl-Archive-Tar (rpm) - A module for Perl manipulation of .tar files
perl-Compress-Zlib (rpm) - A module providing Perl interfaces to the zlib compression library.
perl-Digest-HMAC (rpm) - Digest-HMAC Perl module
perl-Digest-SHA1 (rpm) - Digest-SHA1 Perl module
perl-HTML-Parser (rpm) - Perl module for parsing HTML
perl-HTML-Tagset (rpm) - HTML::Tagset - data tables useful in parsing HTML
perl-IO-Socket-INET6 (rpm) - Perl Object interface for AF_INET|AF_INET6 domain sockets
perl-IO-Socket-SSL (rpm) - Perl library for transparent SSL
perl-IO-Zlib (rpm) - Perl IO:: style interface to Compress::Zlib
perl-Net-DNS (rpm) - DNS resolver modules for Perl
perl-Net-IP (rpm) - Perl module for manipulation of IPv4 and IPv6 addresses
perl-Net-SSLeay (rpm) - Perl extension for using OpenSSL
perl-Socket6 (rpm) - IPv6 related part of the C socket.h defines and structure manipulators
perl-String-CRC32 (rpm) - Perl interface for cyclic redundency check generation
ping (8) - send ICMP ECHO_REQUEST to network hosts
pinky (1) - lightweight finger
pmap (1) - report memory map of a process
portmap (8) - DARPA port to RPC program number mapper
portmap (rpm) - A program which manages RPC connections.
poweroff [halt] (8) - stop the system
pppd (8) - Point-to-Point Protocol Daemon
pr (1) - convert text files for printing
pr (1p) - print files
praliases (8) - display system mail aliases
printenv (1) - print all or part of environment
printf (1) - format and print data
printf (1p) - write formatted output
printf (3) - formatted output conversion
printf (3p) - print formatted output
printf [builtins] (1) - bash built-in commands, see bash(1)
ps (1) - report a snapshot of the current processes
ps (1p) - report process status
ptx (1) - produce a permuted index of file contents
pwck (8) - verify integrity of password files
pwconv (8) - convert to and from shadow passwords and groups
pwd (1) - print name of current/working directory
pwd (1p) - return working directory name
pwd [builtins] (1) - bash built-in commands, see bash(1)
pwd.h [pwd] (0p) - password structure
python (1) - an interpreted, interactive, object-oriented programming language
python (rpm) - An interpreted, interactive, object-oriented programming language.
python-elementtree (rpm) - Fast XML parser and writer
python-numeric (rpm) - Numerical Extension to Python
python-sqlite (rpm) - Python bindings for sqlite.
python-urlgrabber (rpm) - A high-level cross-protocol url-grabber
Qquota (1) - display disk usage and limits
quota (rpm) - System administration tools for monitoring users' disk usage.
quotacheck (8) - scan a filesystem for disk usage, create, check and repair quota files
quotaon (8) - turn filesystem quotas on and off
quotaoff [quotaon] (8) - turn filesystem quotas on and off
quotastats (8) - Program to query quota statistics
Rranlib (1) - generate index to archive
rcp (1) - remote file copy
rdate (1) - get the time via the network
rdate (rpm) - Tool for getting the date/time from a remote machine.
rdev (8) - query/set image root device, RAM disk size, or video mode
rdist (1) - remote file distribution client program
rdist (rpm) - Maintains identical copies of files on multiple machines.
rdistd [rdist] (8) - remote file distribution server program
readcd (1) - read or write data Compact Discs
readelf (1) - Displays information about ELF files
readlink (1) - display value of a symbolic link
readlink (2) - read value of a symbolic link
readlink (3p) - read the contents of a symbolic link
reboot (2) - reboot or enable/disable Ctrl-Alt-Del
reboot [halt] (8) - stop the system
rename (1) - Rename files
rename (2) - change the name or location of a file
rename (3p) - rename a file
renice (8) - alter priority of running processes
repquota (8) - summarize quotas for a filesystem
reset [tput] (1) - initialize a terminal or query terminfo database
reset [tset] (1) - terminal initialization
resize2fs (8) - ext2/ext3 file system resizer
restore (8) - restore files or file systems from backups made with dump
rev (1) - reverse lines of a file
rexec (3) - return stream to a remote command
rlogin (1) - remote login
rm (1) - remove files or directories
rm (1p) - remove directory entries
rmail (8) - handle remote mail received via uucp
rmdir (1) - remove empty directories
rmdir (1p) - remove directories
rmdir (2) - delete a directory
rmdir (3p) - remove a directory
rmmod (8) - simple program to remove a module from the Linux Kernel
route (8) - show / manipulate the IP routing table
rpcinfo (8) - report RPC information
rpm (8) - RPM Package Manager
rpm (rpm) - The RPM package management system.
rpm-libs (rpm) - Libraries for manipulating RPM packages.
rpm-python (rpm) - Python bindings for apps which will manipulate RPM packages.
rsh (1) - remote shell
rsh (rpm) - Clients for remote access commands (rsh, rlogin, rcp).
rsh [ksh] (1) - shell, the
rsync (1) - faster, flexible replacement for rcp
rsync (rpm) - A program for synchronizing files over a network.
Ssane-find-scanner (1) - find SCSI and USB scanners and their device files
scanadf (1) - acquire multiple images from a scanner equipped with an ADF
scanimage (1) - scan an image
scp (1) - secure copy (remote file copy program)
script (1) - make typescript of terminal session
sdiff (1) - find differences between two files and merge interactively
sed (1) - stream editor for filtering and transforming text
sed (1p) - stream editor
sed (rpm) - A GNU stream text editor.
sendmail (8) - an electronic mail transport agent
sendmail (rpm) - A widely used Mail Transport Agent (MTA).
sensors (1) - printing sensors information
sensors-detect (8) - detect hardware monitoring chips
sensors.conf [sensors] (5) - libsensors configuration file
seq (1) - print a sequence of numbers
setkeycodes (8) - load kernel scancode-to-keycode mapping table entries
setleds (1) - set the keyboard leds
setmetamode (1) - define the keyboard meta key handling
setquota (8) - set disk quotas
setsid (2) - creates a session and sets the process group ID
setsid (3p) - create session and set process group ID
setsid (8) - run a program in a new session
setterm (1) - set terminal attributes
sftp (1) - secure file transfer program
sftp-server (8) - SFTP server subsystem
sh (1p) - shell, the standard command language interpreter
sha1sum (1) - compute and check SHA1 message digest
showkey (1) - examine the codes sent by the keyboard
showmount (8) - show mount information for an NFS server
shred (1) - overwrite a file to hide its contents, and optionally delete it
shutdown (2) - shut down part of a full-duplex connection
shutdown (3p) - shut down socket send and receive operations
shutdown (8) - bring the system down
size (1) - list section sizes and total size
skill (1) - send a signal or report process status
slabtop (1) - display kernel slab cache information in real time
slattach (8) - attach a network interface to a serial line
sleep (1) - delay for a specified amount of time
sleep (1p) - suspend execution for an interval
sleep (3) - Sleep for the specified number of seconds
sleep (3p) - suspend execution for an interval of time
snice [skill] (1) - send a signal or report process status
sort (1) - sort lines of text files
sort (1p) - sort, merge, or sequence check text files
sort (3pm) - perl pragma to control sort() behaviour
split (1) - split a file into pieces
split (1p) - split files into pieces
ssh (1) - OpenSSH SSH client (remote login program)
ssh [slogin] (1) - OpenSSH SSH client (remote login program)
ssh-add (1) - adds RSA or DSA identities to the authentication agent
ssh-agent (1) - authentication agent
ssh-copy-id (1) - install your identity.pub in a remote machine's authorized_keys
ssh-keygen (1) - authentication key generation, management and conversion
ssh-keyscan (1) - gather ssh public keys
ssh-keysign (8) - ssh helper program for hostbased authentication
ssh-add (1) - adds RSA or DSA identities to the authentication agent
ssh-agent (1) - authentication agent
ssh-keygen (1) - authentication key generation, management and conversion
ssh-keyscan (1) - gather ssh public keys
sshd (8) - OpenSSH SSH daemon
stat (1) - display file or file system status
stat (2) - get file status
stat (3p) - get file status
strings (1) - print the strings of printable characters in files
strings (1p) - find printable strings in files
strings.h [strings] (0p) - string operations
strip (1) - Discard symbols from object files
strip (1p) - remove unnecessary information from executable files (DEVELOPMENT)
stty (1) - change and print terminal line settings
stty (1p) - set the options for a terminal
stty [unimplemented] (2) - unimplemented system calls
su (1) - run a shell with substitute user and group IDs
sudo (8) - execute a command as another user
sudo (rpm) - Allows restricted root access for specified users.
sudo [sudoedit] (8) - execute a command as another user
sum (1) - checksum and count the blocks in a file
swapoff [swapon] (2) - start/stop swapping to file/device
swapoff [swapon] (8) - enable/disable devices and files for paging and swapping
swapon (2) - start/stop swapping to file/device
swapon (8) - enable/disable devices and files for paging and swapping
sync (1) - flush file system buffers
sync (2) - commit buffer cache to disk
sync (3p) - schedule file system updates
sync (8) - synchronize data on disk with memory
sysctl (2) - read/write system parameters
sysctl (8) - configure kernel parameters at runtime
sysctl.conf [sysctl] (5) - sysctl(8) preload/configuration file
sysklogd (8) - Linux system logging utilities
sysklogd (rpm) - System logging and kernel message trapping daemons.
Ttac (1) - concatenate and print files in reverse
tail (1) - output the last part of files
tail (1p) - copy the last part of a file
tailf (1) - follow the growth of a log file
talk (1) - talk to another user
talk (1p) - talk to another user
talk (rpm) - Talk client for one-on-one Internet chatting.
tar (1) - The GNU version of the tar archiving utility
tar (rpm) - A GNU file archiving program
tar.h [tar] (0p) - extended tar definitions
taskset (1) - retrieve or set a processes's CPU affinity
tcpd (8) - access control facility for internet services
tcpdump (8) - dump traffic on a network
tcpdump (rpm) - A network traffic monitoring tool.
tcpslice (8) - extract pieces of and/or glue together tcpdump files
tee (1) - read from standard input and write to standard output and files
tee (1p) - duplicate standard input
tee (2) - duplicating pipe content
telinit [init] (8) - process control initialization
telnet (1) - user interface to the TELNET protocol
telnet (rpm) - The client program for the telnet remote login protocol.
Test (3pm) - provides a simple framework for writing test scripts
Test [Mail::SpamAssassin::Plugin::Test] (3pm) - test plugin
Test::Builder (3pm) - Backend for building test libraries
Test::Builder::Module (3pm) - Base class for test modules
Test::Builder::Tester (3pm) - test testsuites that have been built with Test::Builder
Test::Builder::Tester::Color (3pm) - turn on colour in Test::Builder::Tester
Test::Harness (3pm) - Run Perl standard test scripts with statistics
Test::Harness::Assert (3pm) - simple assert
Test::Harness::Iterator (3pm) - Internal Test::Harness Iterator
Test::Harness::Point (3pm) - object for tracking a single test point
Test::Harness::Straps (3pm) - detailed analysis of test results
Test::Harness::TAP (3pm) - Documentation for the TAP format
Test::More (3pm) - yet another framework for writing test scripts
Test::Simple (3pm) - Basic utilities for writing tests
Test::Tutorial (3pm) - A tutorial about writing really basic tests
test (1) - check file types and compare values
test (1p) - evaluate expression
test [builtins] (1) - bash built-in commands, see bash(1)
Time::HiRes (3pm) - High resolution alarm, sleep, gettimeofday, interval timers
Time::Local (3pm) - efficiently compute time from local and GMT time
Time::gmtime (3pm) - by-name interface to Perl's built-in gmtime() function
Time::localtime (3pm) - by-name interface to Perl's built-in localtime() function
Time::tm (3pm) - internal object used by Time::gmtime and Time::localtime
time (1) - time a simple command or give resource usage
time (1p) - time a simple command
time (2) - get time in seconds
time (3p) - get time
time (7) - overview of time
time (rpm) - A GNU utility for monitoring a program's use of system resources.
time.conf [time] (5) - configuration file for the pam_time module
time.h [time] (0p) - time types
tload (1) - graphic representation of system load average
tmpwatch (8) - removes files which haven't been accessed for a period of time
tmpwatch (rpm) - A utility for removing files based on when they were last accessed.
top (1) - display Linux tasks
touch (1) - change file timestamps
touch (1p) - change file access and modification times
tr (1) - translate or delete characters
tr (1p) - translate characters
tracepath (8) - traces path to a network host discovering MTU along this path
traceroute (8) - print the route packets trace to network host
traceroute (rpm) - Traces the route taken by packets over an IPv4/IPv6 network
troff (1) - the troff processor of the groff text formatting system
true (1) - do nothing, successfully
true (1p) - return true value
tset (1) - terminal initialization
tsort (1) - perform topological sort
tsort (1p) - topological sort
tty (1) - print the file name of the terminal connected to standard input
tty (1p) - return user's terminal name
tty (4) - controlling terminal
tty ioctl [tty_ioctl] (4) - ioctls for terminals and serial lines
tune2fs (8) - adjust tunable filesystem parameters on ext2/ext3 filesystems
tunelp (8) - set various parameters for the lp device
U ul (1) - do underlining
umount (8) - unmount file systems
umount [mount] (2) - mount and unmount filesystems
umount.cifs [umount] (8) - for normal, non-root users, to unmount their own Common Internet File System (CIFS) mounts
umount.nfs [umount] (8) - unmount a Network File System
umount.nfs4 [umount] (8) - unmount a Network File System
uname (1) - print system information
uname (1p) - return system name
uname (2) - get name and information about current kernel
uname (3p) - get the name of the current system
unexpand (1) - convert spaces to tabs
unexpand (1p) - convert spaces to tabs
unicode_start (1) - put keyboard and console in unicode mode
unicode_stop (1) - revert keyboard and console from unicode mode
uniq (1) - report or omit repeated lines
uniq (1p) - report or filter out repeated lines in a file
uptime (1) - Tell how long the system has been running
useradd (8) - create a new user or update default new user information
userdel (8) - delete a user account and related files
usermod (8) - modify a user account
users (1) - print the user names of users currently logged in to the current host
usleep (1) - sleep some number of microseconds
usleep (3) - suspend execution for microsecond intervals
usleep (3p) - suspend execution for an interval
uudecode (1p) - decode a binary file
uuencode (1p) - encode a binary file
uuidgen (1) - command-line utility to create a new UUID value
Vvdir (1) - list directory contents
vi (1p) - screen-oriented (visual) display editor
vim (1) - Vi IMproved, a programmers text editor
vim-common (rpm) - The common files needed by any version of the VIM editor.
vim-enhanced (rpm) - A version of the VIM editor which includes recent enhancements.
vim-minimal (rpm) - A minimal version of the VIM editor.
vmstat (8) - Report virtual memory statistics
volname (1) - return volume name
W w (1) - Show who is logged on and what they are doing
warnquota (8) - send mail to users over quota
watch (1) - execute a program periodically, showing output fullscreen
wc (1) - print the number of newlines, words, and bytes in files
wc (1p) - word, line, and byte or character count
Wget [wget] (1) - The non-interactive network downloader
wget (rpm) - A utility for retrieving files using the HTTP or FTP protocols.
whatis (1) - search the whatis database for complete words
whereis (1) - locate the binary, source, and manual page files for a command
which (1) - shows the full path of (shell) commands
which (rpm) - Displays where a particular program in your path is located.
who (1) - show who is logged on
who (1p) - display who is on the system
whoami (1) - print effective userid
write (1) - send a message to another user
write (1p) - write to another user
write (2) - write to a file descriptor
write (3p) - write on a file
Xxargs (1) - build and execute command lines from standard input
xargs (1p) - construct argument lists and invoke utility
Yyacc (1p) - yet another compiler compiler (DEVELOPMENT)
yes (1) - output a string repeatedly until killed
ypbind (8) - NIS binding process
ypbind (rpm) - The NIS daemon which binds NIS clients to an NIS domain.
ypcat (1) - print values of all keys in a NIS database
ypmatch (1) - print the values of one or more keys from a NIS map
yppasswd (1) - change your password in the NIS database
yppoll (8) - return version and master server of a NIS map
ypset (8) - bind ypbind to a particular NIS server
yptest (8) - test NIS configuration
ypwhich (1) - return name of NIS server or map master
Z zcat (1p) - expand and concatenate data
zcat [gzip] (1) - compress or expand files
zcmp [zdiff] (1) - compare compressed files
zdiff (1) - compare compressed files
zdump (8) - time zone dumper
zforce (1) - force a '.gz' extension on all gzip files
zgrep (1) - search possibly compressed files for a regular expression
zic (8) - time zone compiler
zless (1) - file perusal filter for crt viewing of compressed text
zmore (1) - file perusal filter for crt viewing of compressed text
znew (1) - recompress .Z files to .gz files
