How to use common Linux commands

Linux Commonly used commands: File and directory management: ls, cd, mkdir, rmdir, rm Text processing: cat, less, grep, sed, awk User and permission management: whoami, passwd, useradd, userdel , chmod system management: top, kill, ps, df, free network management: ping, ifconfig, route, netstat, ssh other common commands: man, history, clear, exit

How to use common Linux commands

1. File and directory management

• ls : List files and directories in the current directory.
• cd: Change the current directory.
• mkdir: Create a directory.
• rmdir: Delete empty directories.
• rm: Delete files.

2. Text processing

• cat: Display the file content.
• less: Display file contents in pages.
• grep: Search for text in a file.
• sed: Replacement text.
• awk: Process structured text.

3. User and permission management

• whoami: Display the current user.
• passwd: Change user password.
• useradd: Create a user.
• userdel: Delete the user.
• chmod: Change file or directory permissions.

4. System Management

• top: Display system processes and resource usage.
• kill: Terminate the process.
• ps: View running processes.
• df: Display disk space usage.
• free: Display memory usage.

5. Network Management

• ping: Test the network connection.
• ifconfig: Display network interface information.
• route: Manage network routing tables.
• netstat: Displays network activity.
• ssh: Remotely access the system through a secure connection.

6. Other commonly used commands

• man: Display the help information of the command.
• history: Display command history.
• clear: Clear the terminal screen.
• exit: Exit the shell.

Please follow the correct syntax and options when using these commands. For example:

• To change the current directory, type cd [directory name].
• To search for files containing specific text, type grep [text][filename].
• To delete a file, type rm [filename].

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