Practice more than 100 common and very important Linux command. This is very helpful everyday life for beginners and professionals every one. Now you can practice more and more than you will learn and create your skill so much smart.
More than 100 linux command below :
# alias
Converts complex commands into simpler one
# bzip2 / bunzip2
Compresses a file / Deompress a bzip2 file.
# bzcat / bzmore
Displays files compressed with bzip2.
# cal
Displays calendar.
# cat
It is a multi-function command.
# cd
Changes current working directory.
# chage
Sets an expiration date for a user account.
# chgrp
Changes group.
# chmod
Changes permission for a file or directory.
# chown
Changes the owner of a file or directory.
# chsh
Changes the shell.
# clear
Clears the terminal.
# comm
Compares two streams or files.
# cp
It means copy file content from one file to other file.
# cut
Used to display desired column from a file.
# date
Displays current date.
# df
Checks the disk space in system.
# echo
Prints the typed word on terminal.
# exit
Exits from the current user group to the last group.
# export
Exports shell variables to other shell.
# file
Displays the type of file.
# find
Finds files for a particular search.
# gpasswd
Transfers group membership to another user.
# grep
Filters lines of text containing a certain string.
# groupadd
Creates a group.
# groupdel
Permanently removes a group.
# groupmod
Changes group name.
# groups
It displays the group name to which current user belongs to.
# gzip / gunzip
Compresses a file / Decompress a gzip file.
# head
Displays first ten lines of a file.
# history
Displays older commands from shell command history.
# HISTSIZE
The number of commands to be stored in current environment.
# HISTFILE
Displays the file that contains the history.
# HISTFILESIZE
The number of commands kept in history file set.
# id
Tells about the user’s id in the system.
# less
Show file content according to the width of the terminal.
# locate
Searches a file in the database.
# ls
Lists all the files of a directory.
# man
Displays the manual page for the specified command.
# mkdir
Creates directory
# more
Displays one output screen at a time.
# mv
Renames directories or files.
# od
Displays a file content in octal format.
# passwd
Set password for a user group.
# pwd
Display the current working directory location.
# PS1
Change the prompt name in terminal.
# rename
Renames more than one file at once.
# rm
Removes a file.
# rmdir
Removes a directory.
# set -o noclobber
Prevents file from getting overwrite.
# set +o noclobber
Allows overwriting in existing file.
# set -u
Displays undefined variables as error.
# set +u
Displays nothing for undefined variable.
# set -x
Displays shell expansion.
# set +x
Disables shell expansion.
# sed
Performs editing in streams.
# sleep
Waits for the specified number of seconds.
# sort
sorts the content in alphabetical order.
# su
A user to run a shell as another user allow.
# sudo
User to start a program with credentials of another user.
# tac
Displays file content in opposite order.
# tail
Displays last ten lines of a file.
# tar
Compresses a directory.
# tee
stdin on stdout and then into a file.
# time
Displays time taken to execute a command.
# touch
Creates an empty file.
tr #
Translates characters.
# type
Displays information about command type.
# uniq
Multi times repeating lines only once.
# unset
Removes a variable from shell.
# useradd
Adds users.
# userdel
Deletes users.
# usermod
Modifies the properties of a user.
# vi
Opens vi editor to write a program.
# w
Displays who is logged on and what are they doing.
# wc
Counts words, lines and characters.
# who
Tells who is logged on the system.
# whoami
Tells the name of the user.
# who am i
Displays the line pointing to your current session.
# zcat / zmore
Views the files compressed with gzip.
Linux important usable Symbols
& (ampersand)
The shell prompt back without waiting for the command to finish.
; (semicolon)
This commands on the same line separated by (;).
$? (dollar question mark)
Exit code of prevoius command is stored in the form of 0 or 1.
|| (double vertical bar)
Represent a logical OR.
&& (double ampersand)
Represent a logical AND.
# (pound sign)
Consider the words typed after it as comment.
\ (escaping special character)
Enable the use of control characters.
*(asterisk)
Generate output matching to the specified * with any number of characters.
? (question mark)
Generate output matching to the specified ? with exactly one character.
[ ] (square brackets)
This command generate output matching any number of characters between the [].
!! (bang bang)
Repeat last command in bash.
! (bang)
This commands other than the last one in bash.
Now you can practice more and more for your best skill.Thank you.
