Linux Ubuntu Commands Cheat Sheet [Free PDF Download]

Ubuntu is a popular open-source operating system used by developers globally. As with any operating system, there are plenty of commands that users must be familiar with in order to interact with the system effectively. Users can use Ubuntu commands to perform complex tasks with a few simple commands, saving time and increasing productivity. So, a Linux Ubuntu Commands Cheat Sheet is a valuable resource that can aid in the process of mastering the Linux terminal. In this article, I will introduce the Linux Ubuntu commands cheat sheet, which is available in multiple formats for free download.

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What is Ubuntu Command in Linux?

Ubuntu command in Linux is a command-line interpreter based on the Bash shell that allows users to interact with the operating system via a text-based interface called the terminal. The commands are typed into the terminal window.

Moreover, these commands can navigate the file system, manage software packages, change system settings, run programs, and perform many other tasks that can be performed using a Graphical User Interface (GUI). But using these commands gives users advantages over GUI, such as automation, speed, etc.

Linux Ubuntu Commands Cheat Sheet

Linux Ubuntu commands cheat sheet provides a list of the most crucial Ubuntu commands that every user should be familiar with. These commands will assist you in navigating the system, managing files and directories, installing and updating software, and performing a variety of other tasks, whether you are a novice or an experienced user. Also, the same list will be provided on the Linux Ubuntu commands cheat sheet that you can download for free in multiple formats.

System Information Ubuntu Commands

System information commands in Ubuntu enable users to retrieve important information about their system such as user information, CPU usage, etc. See the table containing system information command lists below:

Commands Description
free Displays the amount of free and used memory in the system
ps Displays a snapshot of the current processes
ps aux Displays detailed information about all processes currently running
uptime Displays the current uptime of the system
w Displays the list of currently logged-in users
uname Displays system information
uname -a Displays detailed system information
hostname Displays the name of the current host
info Provides access to the documentation of various installed software packages
lshw Lists hardware configuration of the system
history Displays a list of previously executed commands
help Displays information about built-in shell commands
man Displays the manual page for a specified command
tty Reports the file name of the terminal device that is currently used to interact with the shell

System Administration Ubuntu Commands

In this section, I have listed system administration Ubuntu commands that you can use to monitor system performance, install and update software, and other administrative tasks. Check out the following table:

Commands Description
sudo Allows users to run programs with the security privileges of another user, typically the root user
sudo -s Starts a shell with root privileges
sudo -s -u -user Starts a shell with the privileges of the specified user
sudo -k Invalidates the user’s cached credentials
sudo visudo Opens the sudoers file for editing
sudo -H nautilus Opens the file browser with root privileges
sudo  /etc/init.d/gdm restart Restarts the GDM (GNOME Display Manager) service
sudo /etc/init.d/kdm restart Restarts the KDM (KDE Display Manager) service
passwd Allows users to change their password
shutdown Shuts down the system in a safe way
sync Forces all file system changes to be written to disk
reboot Reboots the system
install Installs one or more packages on a Linux system using a package manager
setstatus Displays the status of the SELinux security system
service Controls system services, such as starting, stopping, and restarting them
getent Retrieves entries from databases
env Displays the current environment variables or sets a new environment variable
jobs Displays a list of jobs running in the background of a shell

Permission Management Ubuntu Commands

In this section, I’ve listed the commands you’ll need to change access permissions and perform other system administration tasks:

Commands Description
chmod Changes the permissions of a file or directory and determines who can read, write, or execute a file
chown Changes the owner and/or group of a file or directory

System Monitoring Ubuntu Commands

This category contains system monitoring Ubuntu commands that allow users to monitor system performance and provide real-time information on system resource usage and process activity. To check the system monitoring Linux commands, go through the below table:

Commands Description
top Displays information about the active processes running on the system
htop Shows a list of all the running processes throughout the system
vmstat Shows detailed information about system performance, including memory usage, CPU utilization, and Input/Output (I/O) statistics
free Displays the total amount of free and used memory in the system, as well as the buffers and cached memory used by the kernel
ps Displays information about the active processes on the system, including their process ID (PID), CPU usage, memory usage, and other details
uptime Displays how long the system has been running and the current system load averages
time Measures the execution time of a command or script
dmesg Displays the kernel ring buffer messages, which include system boot messages and other kernel-related messages
finger Displays information about a user, including their login name, full name, home directory, login shell, and the time they last logged in

Shell Built-in Ubuntu Commands

The shell directly executes some commands. Here, you can find these commands without the use of an external program. Following are the shell built-in Linux commands:

Commands Description
export Sets environment variables that are used by processes started by the shell that exported the variable
echo Displays text on the screen or redirects it to a file or variable
alias Creates a shortcut or alternate name for a command
unalias Removes an alias previously created with the “alias” command.
exit Closes the current shell or terminal session
clear Clears the terminal screen
bash Enables users to interact with Linux Operating System
declare Declares variables and specifies their attributes, such as their data type or scope
source Executes a script in the current shell environment rather than creating a new subshell to run the script

File and Directory Management Ubuntu Commands

You can use the file and directory management Ubuntu commands to manage and manipulate files and directories, such as copying, removing, searching, and navigating through them. Get the list in a tabular form below:

Commands Description
mkdir Creates a new directory
cd Changes the current working directory to a specified directory
cd .. Changes the current working directory to the parent directory of the current directory
pwd Prints the current working directory
rm [file] Removes a file
rm -r [dir] Removes a directory and its contents
rm -f [file] Forces the removal of a file
rm -rf [dir] Forces the removal of a directory and its contents
mv Moves or renames files or directories
cp Copies files or directories
locate Searches for files in a database that contains a cached record of all files on the system
cmp Compares two files byte-by-byte and reports the first byte and line that differs between them
comm Compares two sorted files line by line and displays the lines that are common or unique to each file
lsof Lists all open files and the processes that opened them
chgrp Changes the group ownership of files and directories
file Determines the type of a file by examining its contents
fsck Checks and repairs a file system for errors
patch Applies a patch file to an original file, making the changes specified in the patch file
stat Displays detailed information about a file, including its size, permissions, owner, and modification time

File Management and Manipulation Ubuntu Commands

You’ll find commands in this category that allow users to manage and manipulate files and directories, such as creating, listing, and comparing files and directories, making it simple to organize and work with files on your Linux system. For example:

Commands Description
ls Lists files in a directory
ls -al Lists all files in a directory, including hidden files, with detailed information.
ls -R Lists files in a directory and all of its subdirectories
ls -a Lists all files in a directory, including hidden files
touch Modifies timestamps of a file or creates an empty file if it doesn’t exist
diff Compares two files line by line and shows the differences between them

Compression and Archiving Ubuntu Commands

This category contains commands that enable users to compress, decompress, and archive files:

Commands Description
zip Archives files and directories into a compressed zip archive format
unzip Extract the contents of a zip archive file
bzip2 Compresses files using the Burrows-Wheeler block sorting text compression algorithm and Huffman coding
gzip Compresses files using the Lempel-Ziv algorithm and Huffman coding
gunzip Decompresses files that have been compressed using gzip
tar Creates and manipulates archive files

Package Management Commands in Ubuntu

These commands allow users to manage software packages by installing, removing, updating, and searching for packages:

Commands Description
apt-get update Updates the list of available packages
apt-get upgrade Upgrades all installed packages to their latest version
apt-get dist-upgrade Upgrades all installed packages to their latest version
apt-get install pkg Installs a package
apt-get purge pkg Completely removes a package, including its configuration files
apt-get autoremove Removes any packages that were installed as dependencies and are no longer needed
apt-get -f install Attempts to fix any broken dependencies and install missing packages
dpkg -l Lists all installed packages
dpkg – -configure -a Configures all packages that have been unpacked but not yet configured
dpkg -i pkg.deb Installs a package from a .deb file
snap Installs and manages applications on systems

Network Configuration and Firewall Management Commands

In this category, you’ll find commands for configuring and managing network interfaces and firewall rules in the Linux operating system:

Commands Description
wget Downloads files from the internet
ifconfig Shows network interface configuration
iwconfig Shows wireless network interface configuration
sudo iwlist scan Scans for available wireless networks
sudo systemctl restart networking.service Restarts the networking service
ifup interface Brings up a network interface
ifdown interface Brings down a network interface
firewall -cmd Allows users to configure and manage the firewall settings
ufw enable Enables the firewall
ufw disable Disables the firewall
ufw default allow Sets the default policy to allow traffic
ufw default deny Sets the default policy to deny traffic
ufw status Shows the status of the firewall
ufw allow port Opens a port
ufw deny port Closes a port
ufw deny from ip Blocks traffic from a specific IP address

Network Management Ubuntu Commands

These commands allow users to manage network connections, display network information, and troubleshoot network issues:

Commands Description
ip Displays and manipulates network interfaces and routing tables
ping Sends a packet to a host and measures the response time
ssh Remotely logs into a server or other device over a network
scp Transfers files between hosts on a network

User Management Ubuntu Commands

You can use user management commands to manage user accounts and permissions, such as creating, modifying, and deleting user accounts, managing user groups, and setting permissions on files and directories, all of which contribute to the security and accessibility of the system. The table containing user management Linux commands is given below:

Commands Description
useradd Creates a new user account, including setting up a home directory and assigning a password
adduser Creates a new user account interactively or using command-line options
who Displays information about the users who are currently logged in
whoami Displays the current username of the user who is logged in
id Displays the user and group IDs of a specified user or the current user
usermod Modifies a user account, such as changing the user’s login name, password, home directory, or group membership
users Displays a list of usernames of users who are currently logged in
su Switches the current user to another user account, usually with elevated privileges, by prompting for the target user’s password
chage Modifies the password expiry information for a user
userdel Deletes a user account and all associated files and directories
addgroup Creates a new user group
groupadd Creates a new user group
groupmod Modifies the properties of an existing user group

Disk Management Commands in Ubuntu

In this section, you’ll find commands for displaying disk usage, as well as creating, resizing, and formatting disk partitions, as well as mounting and unmounting file systems, to help you optimize storage usage and maintain the health of your Linux system’s storage. Check the table below:

Commands Description
df Displays the disk usage statistics for the file system
df -h Displays the disk usage statistics for the file system in human-readable format
du Estimates the file space usage
fdisk Allows users to create, delete, and modify partitions on hard drives, flash drives, and other storage devices
shred Securely deletes files by overwriting them multiple times with random data
dd Copies and converts data between files, partitions, and devices at the block level
mount Mounts a file system, making it accessible at a specified mount point in the directory tree
mke2fs Creates a new ext2/ext3/ext4 file system on a specified device
mkfs Creates a new file system on a specified device and supports various file system types such as ext2, ext3, ext4, NTFS, and FAT32

Text Processing Ubuntu Commands

In this section, I’ve listed commands for editing, searching, sorting, and transforming text to help you work with large text files and automate text processing tasks:

Commands Description
wc Counts the number of lines, words, and characters in a text file
sort Sorts the lines of a text file in alphabetical or numerical order
nano Allows users to create and edit text files
cut Extracts specific columns or fields from a text file
jed Opens up a powerful text editor that supports multiple modes and macros
vi Opens up a powerful text editor that uses modal editing to allow for quick and efficient editing
vim Opens up a more advanced version of the vi editor with additional features such as syntax highlighting and plugins
paste Merges lines from multiple files and writes them to the standard output
egrep Searches a text file for lines that match a specified pattern using extended regular expressions
split Splits a text file into smaller files based on the number of lines or bytes
sed A stream editor that performs editing operations on a text stream or file
tr Translates or deletes characters in a text stream or file
uniq Filters out duplicate lines from a sorted text file
cat Displays the contents of a file on the terminal
head Displays the first ten lines of a file on the terminal
tail Displays the last ten lines of a file
grep Searches for a specific pattern or text in a file or output
less Displays the contents of a file one page at a time, allowing scrolling back and forth.
more Display the contents of a text file one screen at a time allowing user to scroll up and down through the file, search for specific text, and navigate to specific lines

Miscellaneous Commands in Ubuntu

This section contains commands that provide additional functionality and utility, such as task scheduling, time and calendar display, and so on:

Commands Description
lsblk Lists information about all available or specified block devices and can also display the relationship between the different devices, such as partitions and logical volumes
enable Enables or disables a service at startup or a specific hardware device or driver
bc Command-line calculator that allows for floating-point arithmetic and advanced mathematical functions
cron Automates tasks to run at specified times or intervals
crontab Schedules periodic commands or scripts to run at specified intervals
ncal Displays a calendar for a given month or year
neofetch Displays system information and an ASCII art logo of the operating system
tree Displays a directory tree structure in a hierarchical forma
whereis Locates the binary, source, and manual page files for a command
whatis Displays a brief description of a command
which Displays the location of a command or script in the system’s PATH
at Schedules a one-time command or script to run at a specified time
tee Redirects the output of a command to a file and to the screen
date Displays the current date and time

Ubuntu Keyboard Shortcuts

In this section, you will find some keyboard shortcuts for Ubuntu. Using these shortcuts can help you save time on your tasks:

Commands Description
CTRL+ALT+T Opens terminal in Ubuntu
CTRL+A Places the cursor at the start of the active line
CTRL+E Places the cursor at the end of the active line.
CTRL+U Removes the entire active line
CTRL+K Removes the command from the cursor to the right
CTRL+W Removes the word preceding the cursor.
CTRL+R Performs a history search for commands that match the user’s input
CTRL+C Stop the active process
CTRL+ D Closes the current terminal
CTRL+Z Sends the signal SIGSTOP to temporarily halt the active process
CTRL+L Clears terminal display
CTRL+Q Resumes suspended commands
CTRL+S Halts command output to the screen
CTRL+Z Halts the current command and places it in the background
CTRL+G Exits the history search mode.
CTRL+J Completes the history search at the current command line.
CTRL+O Executes the command found in the reverse search.
CTRL+N / Down Arrow Displays the following command line
CTRL+P / Up Arrow Displays the preceding command line
CTRL+ _ Undo the last action
ALT+F Goes forward one word
ALT+B Goes back one word
ALT+P Searches the history forward from the current line
CTRL+SHIFT+T Opens a new tab on the currently active terminal.
CTRL+SHIFT+W Closes the active tab
CTRL+SHIFT+C Copies the highlighted characters to the clipboard
CTRL+SHIFT+V or SHIFT+INSERT Pastes contents of the clipboard to the active line
Up/Down Arrow keys Allows to quickly execute previous commands multiple times
TAB Completes the typing command
CTRL+B / Left Arrow Moves cursor position one character backward
CTRL+F / Right Arrow Moves cursor position one character forward
CTRL+XX Switches between the current cursor position and the start line
CTRL+]+A Moves the cursor forward to next character of A
ALT+CTRL+]+A Backs the cursor to the preceding character of A

Conclusion

In summary, I attempted to include all commonly used and essential Ubuntu commands and shortcut keys in this article. Moreover, the Linux Ubuntu commands cheat sheet contains a comprehensive list of essential commands to help users navigate the Linux terminal and perform various tasks more efficiently. By referring to the Linux Ubuntu commands cheat sheet, users can save time and avoid errors caused by incorrect command usage. I hope you found this article useful. Please leave a comment if you have any questions or suggestions.

People Also Ask

How to use Linux commands in Ubuntu?

To use Linux commands in Ubuntu, open the Ubuntu terminal by pressing Ctrl+Alt+T and write the commands of your choice to run in the shell.

Is Ubuntu a type of Linux?

Yes, Ubuntu is a type of Linux. To be more precise, it is a distribution of Linux based on Debian architecture which includes Linux kernel, libraries, and other system utilities.

Why Ubuntu is better than Windows?

Ubuntu is better than Windows as it is open-source and free to use. Moreover, ubuntu has a command-line interface, better security, and advanced package management tools than Windows.

Is Ubuntu server free?

Yes, the Ubuntu server is an open-source software. It is free to download, use and share.

What is Ubuntu commands cheat sheet?

Ubuntu commands cheat sheet is the sheet containing useful Ubuntu commands. Some of them are mentioned below:

  1. sudo: Allows users to run programs with the security privileges of another user, typically the root user.
  2. history: Displays a list of previously executed commands.
  3. help: Displays information about built-in shell commands.
  4. man: Displays the manual page for a specified command.
  5. mkdir: Creates a new directory.
  6. cd: Changes the current working directory to a specified directory.
  7. cd ..: Changes the current working directory to the parent directory of the current directory.
  8. wc: Counts the number of lines, words, and characters in a text file.
  9. sort: Sorts the lines of a text file in alphabetical or numerical order.
  10. nano: Allows users to create and edit text files.
  11. cut: Extracts specific columns or fields from a text file.
  12. df: Displays the disk usage statistics for the file system.

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Lamisa Musharrat

Hello there. My name is Lamisa Musharat, and I'm an Linux Content Developer Executive at SOFTEKO. I earned a bachelor's degree in Naval Architecture and Marine Engineering from Bangladesh University of Engineering and Technology (BUET).I learned Linux out of my curiosity and now I find it useful as automation is easier using Linux. I take great pleasure in assisting others with Linux-related issues. I really want you to enjoy and benefit from my efforts.Read Full Bio

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