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May 10, 2021 02:02 pm GMT

Linux Commands Cheat Sheet

This commands helps you anytime

Basic Linux commands

Command	Description
`ls`	Lists all files and directories in the present working directory
`ls-R`	Lists files in sub-directories as well
`ls-a`	Lists hidden files as well
`ls-al`	Lists files and directories with detailed information like permissions,size, owner, etc.
`cd or cd ~`	Navigate to HOME directory
`cd ..`	Move one level up
`cd`	To change to a particular directory
`cd /`	Move to the root directory
`cat > filename`	Creates a new file
`cat filename`	Displays the file content
`cat file1 file2 > file3`	Joins two files (file1, file2) and stores the output in a new file (file3)
`mv file "new file path"`	Moves the files to the new location
`mv filename new_file_name`	Renames the file to a new filename
`sudo`	Allows regular users to run programs with the security privileges of the superuser or root
`rm filename`	Deletes a file
`man`	Gives help information on a command
`history`	Gives a list of all past commands typed in the current terminal session
`clear`	Clears the terminal
`mkdir directoryname`	Creates a new directory in the present working directory or a at the specified path
`rmdir`	Deletes a directory
`mv`	Renames a directory
`pr -x`	Divides the file into x columns
`pr -h`	Assigns a header to the file
`pr -n`	Denotes the file with Line Numbers
`lp -nc , lpr c`	Prints c copies of the File
`lp-d lp-P`	Specifies name of the printer
`apt-get`	Command used to install and update packages
`mail -s 'subject' -c 'cc-address'` `-b 'bcc-address' 'to-address'`	Command to send email
`mail -s "Subject" to-address < Filename`	Command to send email with attachment

File Permission commands

Command	Description
`ls-l`	to show file type and access permission
`r`	read permission
`w`	write permission
`x`	execute permission
`-=`	no permission
`Chown user`	For changing the ownership of a file/directory
`Chown user:group filename`	change the user as well as group for a file or directory

Environment Variables command

Command	Description
`echo $VARIABLE`	To display value of a variable
`env`	Displays all environment variables
`VARIABLE_NAME= variable_value`	Create a new variable
`Unset`	Remove a variable
`export Variable=value`	To set value of an environment variable

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