> For the complete documentation index, see [llms.txt](https://tech.keeganturner.co.za/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://tech.keeganturner.co.za/how-to-guides/linux-basics-commands.md).

# Linux basics: commands

**Linux is an open-source operating system kernel used as the foundation for a wide range of operating systems, known as Linux distributions. It provides a robust and customizable environment for computing, suitable for diverse applications, from servers to personal devices. Linux supports multitasking, multiuser capabilities, and a secure, permission-based file system. It is widely employed in server environments due to its stability, security features, and efficiency. As a versatile and freely accessible operating system, Linux plays a crucial role in empowering developers, system administrators, and organizations to build and manage computing infrastructure.**

**Commands**

#### System Information

1. **`ls`** - List directory contents.
2. **`pwd`** - Print name of current/working directory.
3. **`cd`** - Change directory.
4. **`man`** - Display manual pages for commands.
5. **`uname`** - Print system information.

#### File Operations

6. **`cp`** - Copy files and directories.
7. **`mv`** - Move/rename files and directories.
8. **`rm`** - Remove/delete files or directories.
9. **`mkdir`** - Create directories.
10. **`rmdir`** - Remove empty directories.

#### Text Processing

11. **`cat`** - Concatenate and display files.
12. **`grep`** - Search for patterns in files.
13. **`sed`** - Stream editor for filtering and transforming text.
14. **`awk`** - Pattern scanning and text processing language.

#### File Viewing and Editing

15. **`less`** - View file contents interactively.
16. **`head`** - Output the first part of files.
17. **`tail`** - Output the last part of files.
18. **`nano`** - Terminal text editor.
19. **`vim`** - Powerful text editor.

#### Process Management

20. **`ps`** - Report a snapshot of the current processes.
21. **`top`** - Display and update sorted information about processes.
22. **`kill`** - Send signals to processes.

#### System Control

23. **`shutdown`** - Shutdown or restart the system.
24. **`reboot`** - Reboot the system.
25. **`halt`** - Halt the system.

#### Package Management

26. **`apt-get`** (or `apt` on newer systems) - Command-line tool for handling packages.
27. **`dpkg`** - Debian package manager.
28. **`yum`** - Package manager for RPM-based Linux distributions.

#### Network

29. **`ping`** - Send ICMP ECHO\_REQUEST to network hosts.
30. **`ifconfig`** - Configure network interfaces.
31. **`ssh`** - OpenSSH SSH client (remote login program).
32. **`scp`** - Secure copy (remote file copy program).

#### User Management

33. **`useradd`** - Create a new user or update default new user information.
34. **`userdel`** - Delete a user account and related files.
35. **`passwd`** - Update a user's authentication tokens.

#### Compression and Archiving

36. **`tar`** - Tape archive utility.
37. **`gzip`** - Compress or decompress files.
38. **`zip`** - Package and compress (archive) files.

#### Disk Usage

39. **`df`** - Report file system disk space usage.
40. **`du`** - Estimate file space usage.

#### Permissions

41. **`chmod`** - Change file mode bits (permissions).
42. **`chown`** - Change file owner and group.

#### Miscellaneous Utilities

43. **`date`** - Display or set the system date and time.
44. **`echo`** - Display a line of text/string.
45. **`wc`** - Print newline, word, and byte counts for each file.
46. **`find`** - Search for files in a directory hierarchy.

#### Environment

47. **`export`** - Set environment variables.
48. **`source`** - Execute commands from a file in the current shell.
49. **`alias`** - Create or list command aliases.
50. **`history`** - Command history list.

Each of these commands plays a crucial role in Linux system administration and daily usage, covering a wide range of tasks from basic file manipulation to system control and network management.


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