# Display Linux system information
uname -a# Display kernel release information
uname -r# Show operating system information such as distribution name and version
cat /etc/os-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