Linux Commands You Should Know


Linux commands are an integral part of navigating and managing a Linux operating system. Whether you are a system administrator, developer, or simply a Linux enthusiast, understanding the most important Linux commands is crucial for efficient system administration and troubleshooting. In this write-up, we will explore some of the most important Linux commands that every user should be familiar with.


The ls command lists files and directories in the current directory. It provides useful information such as file permissions, ownership, size, and modification time.
ls -l


The cd command is used to change the current working directory. It allows you to navigate through the file system.
cd /home/username/directory


The mkdir command creates a new directory with the specified name.
mkdir new_directory


The rm command removes files and directories. Be cautious when using this command, as deleted files cannot be easily recovered.
rm filename


The cp command copies files and directories from one location to another.
cp file1 file2


The mv command moves or renames files and directories. It can be used to move files to different directories or rename them.
mv file1 file2


The cat command displays the contents of a file on the standard output. It is useful for viewing the contents of small files.
cat filename


The grep command searches for specific patterns within files or the output of other commands. It is commonly used for text searching and filtering.
grep "pattern" filename


The pwd command prints the present working directory. It is helpful for quickly identifying your current location in the file system.


The chmod command changes the permissions of files and directories, allowing you to control who can read, write, or execute them.
chmod 755 filename


The “sudo” command allows users to execute commands with administrative privileges. It is commonly used for system administration tasks.
sudo command


The ssh command enables secure shell connections to remote servers. It is used for secure remote login and remote command execution.
ssh username@hostname


The man command displays the manual pages for a specific command, providing detailed information about its usage and options.
man command


The top command displays real-time information about system processes, including CPU usage, memory usage, and process IDs. It is useful for monitoring system performance.


The df command displays information about available disk space on the file system. It helps you monitor disk usage and identify available storage.
df -h

Mastering these important Linux commands will greatly enhance your ability to navigate and manage a Linux system effectively. While this list covers some essential commands, Linux offers a vast array of commands to explore and utilize. By understanding and practicing these commands, you will gain confidence and proficiency in using the Linux command line for various tasks, making your Linux experience more productive and efficient.