Linux command Line Cheat sheets-[A list of Shortcuts]

Linux Command Line Cheat sheets-[A list of Shortcuts]

Linux: Linux command is the Service of Linux operating systems. All the tasks either it is basic or advanced tasks can be done by executing the Linux commands. Below in this article, you can get to know about the basic Linux commands that are used commonly. To know about this in detail, read the article fully.

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Last updated on Sep 13, 2021.

Download Linux command line Cheatsheet for offline study here: Linux command line Cheatsheet.PDF

Linux Bash Commands

Commands Description
uname -a This command shows the system and the kernel.
mount Displays the mounted file.
date Displays the system date.
uptime To present the uptime.
whoami This command displays your username.
date Displays the system date.
man command This presents the manual for the command.

Linux Shortcuts for bash

Shortcuts usage
CTRL-c To stop the current command.
CTRL-z Shortcut for sleep program.
CTRL-a To go to the start of the line.
CTRL-e This shortcut is to go to the end of the line.
CTRL-u This is to cut from the start of the line.
CTRL-k To cut to the end of the line.
CTRL-r Shortcut for search history.
!! To repeat the last command.
!abc This shortcut is to run the last command starting with abc.
!abc:p To print the last command starting with abc.
!$ To execute the last word of the previous command.
ALT- Last argument of the previous command.
!* To get to all the arguments of the previous command.
^abc^123 This shortcut runs the previous command, replacing abc with 123.

Linux Bash Variables

Variables Description
env This one shows the environmental variables.
echo $NAME This presents the output value of the $NAME variable.
export NAME=value To set $ name to value.
$PATH Executable search path.
$HOME Variable is a Home directory.
$SHELL variable for the current shell.

IO Redirection

Here, cmd refers to the command.

cmd< file This command is the input of cmd from the file.
cmd1 <(cmd2) This is for the output of cmd2 as file input to cmd1.
cmd>file This command is for the standard output of cmd to file.
cmd> /dev/null This command is to discard the standard out (stdout) of cmd.
cmd>> file To add stdout to file.
cmd 2>file This command is for the error output of cmd to file.
cmd1>&2 stdout to the same place as stderr.
cmd2>&1 stderr to the same place as stdout.
cmd&>file Indicates the shortcut to every output to file.

Pipes

cmd1 |cmd2 stdout of cmd1 to cmd2
cmd1|&cmd2 stderr of cmd1 to cmd2.

Command lists

Commands usage
cmd1; cmd2 To run cmd1, then cmd2.
cmd1 && cmd2 to run cmd2 if cmd1 is successful.
cmd1||cmd2 This command is to run cmd2 if cmd1 is not successful.
cmd & To run cmd in a subshell.

Directory operations

pwd It shows the current directory.
mkdir dir To make directory dir.
cd dir To change directory to dir.
cd .. This is to go up a directory.
ls To list files.

ls

-a To show all the files including hidden one.
-R For recursive list.
-r To reverse the order.
-t To sort by the last modified.
-S This is to arrange by the file size.
-I To form a long-lasting list format.
-l This command is for one file per line.
-m To get comma-separated output.
-Q To get quoted output.

Search Files

Pattern files Description
grep pattern files To search for the pattern in files.
grep-i This enables case-insensitive search.
grep-r For recursive search.
grep-v For inverted search.
grep0 This pattern shows the matched part of the file only.
find/dir/name name This pattern finds files starting with the name in dir.
find/dir/ -user name Find files owned by name in dir.
find/dir/=mmin num To find files modified less than num minutes ago in dir.
whereis command This one pattern is to find binary, source, manual for the command.
locate file This command finds the files.

File operations

 

touch file1 Is to create file 1.
cat file 1file 2 To concatenate files and output.
less file 1 To view and paginate file 1.
file file1 This is to get a type of file 1.
cp file1 file2 To copy file 1 and file 2.
mv file1file2 This is to move file 1 to file 2.
rm file 1 For deleting file 1.
head file 1 This is to show the first 10 lines of file 1.
tail file 1 To show the last 10 lines of file 1.
tail -F file 1 This command outputs the last lines of file 1 as it changes1.
watch -n 5’ntpq -p’ This command issues the ‘ntpq -p’ command every 5 seconds and display the output.

Process Management

ps This one displays the snapshot of processes.
top Displays the show real-time processes.
kill pid This kill process with id pid.
pkill name To kill the process with name name.
killall name This kills all processes with names beginning name.

Nano Shortcuts

Shortcut key Used to
Ctrl-R To read the file.
Ctrl-O This is a shortcut is to save files.
Ctrl-X Shortcut to close the file.
ALT-A This shortcut is to start marketing text.
CTRL-K To cut marked text or line.
CTRL-U Shortcut to paste text
ALT-/ Navigation shortcut key to go to the end of the file.
CTRL-A To navigate to the beginning of the file.
CTRL-E Navigating shortcut key to the end of the line.
CTRL-C To show line number.
CTRL-_ To go to line number.
CTRL-W This shortcut is to find.
ALT-W To find next
CTRL-\ Shortcut key to search and replace.

Screen shortcuts

screen To start a screen session.
screen-r To resume a screen session.
screen-list Displays your current screen sessions.
CTRL-A To activate commands for the screen.
CTRL-A c Generate a new instance of terminal.
CTRL-A n To go to the next instance of terminal.
CTRL-A p This shortcut is to go to the previous instance of the terminal.
CTRL-A “ To show current instances of the terminal.
CTRL-A To rename the current instance.

File permissions

chmod 775 file To change the mode of a file to 775.
chmod -R 600 folder For to recursively chmod folder to 600.
chown user group file To change file owner to user and group to group.

File permission Numbers

4 This number is to read (r).
2 To write(w).
1 To execute (x).

In this article, we explained the basic Linux commands that are used commonly. Thank you for visiting this site.

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