IP alias and IP route

This command will add the IP address 192.168.174.22 as an alias (eth0:0) to the eth0 interface.

 sudo ifconfig eth0:0 192.168.174.22 netmask 255.255.255.0 up

If you prefer to use the ip command, you can achieve the same with:

sudo ip addr add 192.168.174.22/24 dev eth0

IP route default GW

 sudo ip route add default via 192.168.174.21