uname -a
Fundamental information about your computer. (Kernel, hostname, kernel release, kernel version, processor type, os name)
hostname
Prints the name of your computer.
hostname -f
Prints the fully qualified name.
ip addr show
Print network interfaces.
ip maddr
Display multicast addresses of your network devices.
ip link
Display attributes of your network devices.
ip route
Display your routing table.
ip monitor
Monitor your network devices, type ^C to stop.
ip neigh
View neighbors.
ifconfig -a
ifconfig is an ancestor to ip. Use ip instead.