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

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]