Secret Linux Commands: The Ones Your Teacher Never Told You About

While Linux has many well-known commands, there are some lesser-known ones that can be incredibly useful. Here are a few “secret” Linux commands that you might not have learned about in school:

1. ctrl + r

This command is a powerful search function that allows you to search through your command history. Simply press ctrl + r and start typing a command. Linux will search through your history and display the most recent match.

2. screen

The screen command allows you to create multiple virtual terminals within a single terminal window. This can be incredibly useful for managing multiple tasks at once. To use screen, simply type screen at the command line, and then use the following commands to manage your screens:

• ctrl + a c: Create a new screen
• ctrl + a n: Move to the next screen
• ctrl + a p: Move to the previous screen
• ctrl + a d: Detach from the current screen

3. tmux

Similar to screen, tmux is a terminal multiplexer that allows you to create multiple virtual terminals within a single terminal window. However, tmux has a more modern interface and is generally easier to use. To use tmux, simply type tmux at the command line, and then use the following commands to manage your sessions:

• ctrl + b c: Create a new window
• ctrl + b n: Move to the next window
• ctrl + b p: Move to the previous window
• ctrl + b d: Detach from the current session

4. htop

htop is an interactive process viewer that provides a more detailed view of your system's processes than the traditional top command. To use htop, simply type htop at the command line.

5. ncdu

ncdu is a disk usage analyzer that provides a detailed view of your system's disk usage. To use ncdu, simply type ncdu at the command line.

6. strace

strace is a system call tracer that allows you to see the system calls made by a process. This can be incredibly useful for debugging. To use strace, simply type strace followed by the command you want to trace.

7. mtr

mtr is a network diagnostic tool that combines the functionality of ping and traceroute. To use mtr, simply type mtr followed by the hostname or IP address you want to test.

These are just a few of the many “secret” Linux commands out there. By mastering these commands, you can become a more efficient and effective Linux user.

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