Systeminfo
Display Linux system information
uname -a
Display kernel release information
uname -r
Show which version of Red Hat/Debian/Ubuntu installed
cat /etc/redhat-release # (or Debian / Ubuntu)
Show how long the system has been running + load
uptime
Display all local IP addresses of the host
hostname -I
Show system reboot history
last reboot
Programs for information
screenfetch; neofetch