Linux Command Cheat Sheet

February 13, 2020

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Hello everyone, here is a list of all the linux commands I can think of and can be helpful for your usage. Download Linux Command Cheat Sheet PDF Version here.

File Administration

  • ls [options] [arguments] : List the files in a particular directory or present directory if used without options or arguments
  • cd [options] directory: change the present directory
  • ln [options] original file link file : Create links b/w files or b/w directories
  • ln [options] original file : Create a link to the original file in the present directory
  • mkdir [options] directory : Make a directory
  • mv [options] source destination : Move and/or rename files and directories
  • pwd [option] : prints the current working directory
  • rm [options] file : Delete files or directories
  • rmdir [options] directory : Remove empty directories
  • tar [options] archivename [file(s)] : archive or extract files
  • chgrp [options] group files: Change group ownership of one or more files & directories
  • chmod [options]mode files: Change access permissions of one or more files & directories
  • chown[options] new owner files : Change the ownership of one or more files & directories
  • cp [options] source destination : Copy files and directories
  • find [start-point] [search-criteria] [search-term] : find files
  • gzip [options] filename : compress or expand files
  • cat [options] [filenames] [-] [filenames] : Display, combine or create new files.
  • cut [options] file : Cut out sections of each line of a file or files
  • diff [options] from-file to-file : Display the differences between two files
  • grep [options] pattern [file] : Search text and match patterns
  • head [options] filename(s) : List the first part of a specified file
  • less [options] filename : Display text files
  • more [options] filename : Display a text file
  • tail [options] filename(s) : List the last part of a specified file

Processes

  • crontab [-u user] [-l | -r | -e] : Schedule a task to run at a particular time or interval
  • kill [options] PID(s) : sends a signal to terminate a process or processes by PID
  • killall [options] command name : sends a signal to terminate a processes by name
  • ps [options] : displays a snapshot of the current processes
  • top [options] : display system and process information in real time

Network

  • ifconfig [arguments] interface [options] : Configure a network interface
  • ifconfig [arguments] [interface] : View network interface details
  • ip [options] object sub-command [parameters] : network configuration tool
  • netstat [options] : network connection monitoring tool
  • ping [options] remote server : checks the network connection to a remote server.
  • curl [options] [URL] : download or upload files to remote servers.
  • host [options] server : checks a computers IP address from its host-name or the reverse
  • scp[options][email protected]:directory/[email protected]:directory/filename : securely copy files between computers
  • sftp [options] [[email protected]] hostname [:directory] : interactively copy files between computers securely
  • ssh [options] [login name] server : securely access a remote computer.
  • traceroute [options] host-name : trace the route packets take to network host
  • wget [options] [URL] : download or upload files from the web non-interactivly.

Miscellaneous

  • apt-get install package-name : Install a package
  • apt-get remove package-name : Un-install a package
  • apt-get update : Update the database of available packages
  • apt-get upgrade : Upgrade the packages on the system
  • echo [options] [string(s)] : display text on the screen.
  • groupadd [options] group : add a group account
  • clear : clears the terminal screen.
  • man [options] command : display the reference manual for a command.
  • modprobe [options] modulename : Load or remove a Linux kernel module
  • passwd [options] username : change the user password
  • shutdown [options] [time] [message] : shut down or restart a system.
  • su [options] [username] : switch to another user.
  • sudo [options] command : Execute a command as the superuser
  • usermod [options] username : Modify a users account configuration
  • useradd [options] username : Add a user account
  • who [options] : report the users logged onto the system.
  • whoami [options] : report the current user.

File Systems

  • fdisk [options] [device] : manipulate partition tables.
  • mkfs [options] device : format a partition with a file system
  • mount [options] type device directory : Mount storage onto the file system
  • umount [options] device and/or directory : Unmount storage from the file system

System Information

  • date [options] +format : display or set the date / time
  • du [options] file : display the amount space used in files and directories
  • free [options] : displays information about free and used memory on the system
  • df [options] file : display the amount of free space on filesystems.