Basic System Commands¶
System Information¶
A list of useful system commands:
| Command | Description |
| ---------- | ------------------------------------------------------------------------------------- |
| whoami | Displays current username |
| id | Returns users identity |
| hostname | sets or prints the name of current host system |
| uname | Prints basic information about the OS and hardware |
| pwd | Returns working directory name |
| ifconfig | Used to assign or view an address to a network interface |
| ip | ip is a utility to show or manipulate routing, network devices, interface and tunnels |
| netstat | Shows network status |
| ss | Another utility to investigate sockets |
| ps | Shows process status |
| who | Displays who is logged in |
| env | Prints environment variables or sets and executes command. |
| lsblk | List block devices |
| lsusb | Lists USB devices |
| lsof | Lists opened files |
| lspci | Lists PCI devices. |
| cat /etc/*release | Show the system's operating system version |
Manual Pages¶
man sections:
| Section | Description |
|---|---|
1 |
Executable programs or shell commands |
2 |
System calls (C functions provided by the kernel) |
3 |
Library calls (functions within program libraries) |
4 |
Special files (usually found in /dev) |
5 |
File formats and conventions eg /etc/passwd |
6 |
Games |
7 |
Miscellaneous (including macro packages and conventions), e.g. man(7), groff(7) |
8 |
System administration commands (usually only for root) |
9 |
Kernel routines [Non standard] |