A list of essential commands for Linux users and cyber-security experts.

A few list of commands for beginner Linux user and also essential for who wish to become cyber-security expert. Most of these tools come pre-installed with Linux. Having use of knowledge of all this commands is not only crucial for routine Linux tasks, but also plays a key role when assessing security configurations, identifying vulnerabilities, or preventing potential security risks in Linux operating systems.

I am going to write it down here, so that I can later re-visit and have a look:

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 operating system name and system hardware.
pwd	Returns working directory name.
ifconfig	The ifconfig utility is used to assign or to view an address to a network interface and/or configure network interface parameters.
ip	Ip is a utility to show or manipulate routing, network devices, interfaces 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 or sets and executes command.
lsblk	Lists block devices.
lsusb	Lists USB devices
lsof	Lists opened files.
lspci	Lists PCI devices.

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