SYSTEM INFORMATION

Display Linux system information

uname -a

Display kernel release information

uname -r

Show which version of Red Hat installed

cat /etc/redhat-release

Show how long the system has been running + load

uptime

Show system host name

hostname

Display all local IP addresses of the host.

hostname -I

Show system reboot history

last reboot

Show the current date and time

date

Show this month's calendar

cal

Display who is online

w

Who you are logged in as

whoami