CentOS

I compiled useful linux commands

System


Command	Description
uname -a	Displays system information
uname -r	Displays kernel version
uptime	Gives a one-line display the current time, how long the system has been running, how many users are currently logged on, the system load averages for the past 1, 5, and 15 minutes
hostname	Displays the system host name
last reboot	Display last reboot times
date	Displays the system date and time
cal	Display the calendar for this month, with today highlighted
w	Displays a list of logged on users and their processes as shown below
whoami	Displays the name of the user who runs the command
finger itech	Display information about the user itech

Hardware