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Bash Commands List

Well here is a basic index of commands used in bash found it at a great site  here

For More Info on the commands visit the above link:

alias          Create an alias
apropos     Search Help manual pages (man -k)
awk           Find  and Replace text, database sort/validate/index

break         Exit from a loop
builtin        Run a shell builtin
bzip2         Compress or decompress named file(s)

cal             Display a calendar
case           Conditionally perform a command
cat             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

ddrescue   Data recovery tool
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
dig            DNS lookup
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
egrep        Search file(s) for lines that match an extended expression
eject          Eject removable media
enable       Enable and disable builtin shell commands
env           Environment variables
ethtool      Ethernet card settings
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

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
file          Determine file type
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         File system consistency check and repair
ftp           File Transfer Protocol
function  Define Function Macros

alias          Create an alias
apropos     Search Help manual pages (man -k)
awk           Find  and Replace text, database sort/validate/index

break         Exit from a loop
builtin        Run a shell builtin
bzip2         Compress or decompress named file(s)

cal             Display a calendar
case           Conditionally perform a command
cat             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
ddrescue   Data recovery tool
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
dig            DNS lookup
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
egrep        Search file(s) for lines that match an extended expression
eject          Eject removable media
enable       Enable and disable builtin shell commands
env           Environment variables
ethtool      Ethernet card settings
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

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
file              Determine file type
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             File system consistency check and repair
ftp               File Transfer Protocol
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
ifconfig      Configure a network interface
import        Capture an X server screen and save the image to file
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
look          Display lines beginning with a given string
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)
lsof            List open files

make         Recompile a group of programs
man           Help manual
mkdir         Create new folder(s)
mkfifo        Make FIFOs (named pipes)
mkisofs      Create an hybrid ISO9660/JOLIET/HFS filesystem
mknod       Make block or character special files
more          Display output one screen at a time
mount        Mount a file system
mtools       Manipulate MS-DOS files
mv             Move or rename files or directories

netstat        Networking information
nice           Set the priority of a command or job
nl               Number lines and write files
nohup        Run a command immune to hangups
nslookup   Query Internet name servers interactively

passwd     Modify a user password
paste         Merge lines of files
pathchk    Check file name portability
ping         Test a network connection
popd         Restore the previous value of the current directory
pr              Prepare 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)
rsync           Remote file copy (Synchronize file trees)

screen         Terminal window manager
scp               Secure copy (remote file copy)
sdiff             Merge two files interactively
sed               Stream Editor
select           Accept keyboard input
seq               Print numeric sequences
set                Manipulate shell variables and functions
sftp              Secure File Transfer Program
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
ssh              Secure Shell client (remote login program)
strace          Trace system calls and signals
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

tail              Output the last part of files
tar              Tape ARchiver
tee              Redirect output to multiple files
test             Evaluate a conditional expression
time            Measure Program running time
times           User and system times
touch          Change file timestamps
top              List processes running on the system
traceroute   Trace Route to Host
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’)
vi              Text Editor

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’)
Wget       Retrieve web pages or files via HTTP, HTTPS or FTP

xargs      Execute utility, passing constructed argument list(s)
yes         Print a string until interrupted

.period   Run commands from a file
###        Comment / Remark

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