An
A-Z Index of the Linux BASH command line
alias
Create an alias
awk Find and Replace text within file(s)
break
Exit from a loop
builtin Run a shell builtin
cal
Display a calendar
case
Conditionally perform a commandcat Display the
contents of a file
cd Change Directory
cfdisk Partition table manipulator for Linux
chgrp Change group ownership
chmod Change access permissions
chown Change file owner and group
chroot Run a command with a different root directory
cksum
Print CRC checksum and byte counts
clear Clear terminal screen
cmp Compare two files
comm Compare two sorted files line by line
command
Run a command - ignoring shell functions
continue
Resume the next iteration of a loop
cp Copy
one or more files to another location
cron Daemon to execute scheduled commands
crontab Schedule a command to run at a later time
csplit Split a file into context-determined pieces
cut
Divide a file into several parts
date
Display or change the date & time
dc Desk
Calculator
dd Data Dump - Convert and copy a file
declare Declare variables and give them attributes
df Display free disk space
diff
Display the differences between two files
diff3
Show differences among three files
dir
Briefly list directory contents
dircolors Colour setup for `ls'dirname
Convert a full pathname to just a path
dirs Display list of remembered directories
du
Estimate file space usage
echo
Display message on screen
ed A line-oriented text editor (edlin)
egrep Search file(s) for lines that match an
extended expression
eject Eject CD-ROM
enable Enable and disable builtin shell commands
env Display, set, or remove environment variables
eval Evaluate several commands/arguments
exec
Execute a command
exit Exit the shell
expand
Convert tabs to spaces
export
Set an environment variable
expr Evaluate expressions
factor
Print prime factors
false Do
nothing, unsuccessfully
fdformat Low-level format a floppy disk
fdisk Partition table manipulator for Linux
fgrep Search file(s) for lines that match a fixed
string
find
Search for files that meet a desired criteria
fmt Reformat paragraph text
fold Wrap
text to fit a specified width.
for
Expand words, and execute commands
format Format disks or tapes
free
Display memory usage
fsck Filesystem
consistency check and repair.
function
Define Function Macros
gawk Find
and Replace text within file(s)
getopts Parse positional parameters
grep Search file(s) for lines that match a given
pattern
groups
Print group names a user is in
gzip Compress or decompress named file(s)
hash
Remember the full pathname of a name argument
head Output
the first part of file(s)history Command History
hostname
Print or set system name
id Print
user and group id's
if
Conditionally perform a command
import
Capture an X server screen and save the image to file
info Help
info
install
Copy files and set attributes
join Join lines on a common field
kill Stop
a process from running
less
Display output one screen at a time
let
Perform arithmetic on shell variables
ln Make links between files
local
Create variables
locate
Find files
logname Print current login name
logout
Exit a login shell
lpc Line printer control program
lpr Off line print
lprint Print a file
lprintd Abort a print job
lprintq List the print queue
lprm Remove jobs from the print queue
ls List information about file(s)
m4 Macro
processor
man Help
manual
mkdir Create new folder(s)
mkfifo Make FIFOs (named
pipes)
mknod Make block or character special files
more
Display output one screen at a time
mtools Manipulate MS-DOS files
mv Move or rename files or directories
nice Set
the priority of a command or job
nl Number lines and write files
nohup Run a command immune to hangups
passwd Modify a user password
paste
Merge lines of files
pathchk Check file name portability
popd Restore the previous value of the current
directory
pr
Convert text files for printing
printcap Printer capability database
printenv Print environment variables
printf Format and print data
ps Process status
pushd Save and then change the current directory
pwd Print Working Directory
quota
Display disk usage and limits
quotacheck Scan a file system for disk usage
quotactl Set disk quotas
ram ram disk device
rcp Copy files between two machines.
read read a line from standard input
readonly Mark variables/functions as readonly
remsync Synchronize remote files via email
return
Exit a shell function
rm Remove files
rmdir Remove folder(s)
rpm
Remote Package Manager
rsync Remote file copy (Synchronize file trees)
screen
Terminal window manager
sdiff Merge two files interactively
sed Stream Editor
select
Accept keyboard input
seq Print numeric sequences
set
Manipulate shell variables and functions
shift Shift positional parameters
shopt Shell Options
shutdown Shutdown or restart linux
sleep
Delay for a specified time
sort Sort text files
source
Run commands from a file `.'
split Split a file into fixed-size pieces
su Substitute user identity
sum Print
a checksum for a file
symlink Make a new name for a file
sync
Synchronize data on disk with memory
tac Concatenate and write files in reverse
tail
Output the last part of files
tar Tape ARchiver
tee
Redirect output to multiple files
test
Evaluate a conditional expression
time
Measure Program Resource Use
times
User and system times
touch Change
file timestamps
top List
processes running on the system
traceroute
trap Run
a command when a signal is set(bourne)
tr Translate, squeeze, and/or delete characters
true Do
nothing, successfully
tsort Topological sort
tty Print filename of terminal on stdin
type
Describe a command
ulimit Limit user resources
umask Users file creation mask
umount Unmount a device
unalias Remove an alias
uname Print system information
unexpand Convert spaces to tabs
uniq Uniquify files
units
Convert units from one scale to another
unset
Remove variable or function names
unshar Unpack shell archive scripts
until
Execute commands (until error)
useradd Create new user account
usermod Modify user account
users
List users currently logged in
uuencode
Encode a binary file uudecode Decode a file created by uuencode
v
Verbosely list directory contents (`ls -l -b')
vdir Verbosely list directory contents (`ls -l -b')
watch
Execute/display a program periodically
wc Print byte, word, and line counts
whereis Report all known instances of a command
which
Locate a program file in the user's path.
while
Execute commands
who Print
all usernames currently logged in
whoami Print the current user id and name (`id -un'
xargs Execute utility, passing constructed argument
list(s)
yes Print
a string until interrupted
.period Run
commands from a file
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