Add Permanent Routes in Linux Using nmcli command line tool

You can use the following command to list configured network connections:

nmcli connection show

Example:

$ sudo nmcli connection show | awk '{ print $1,$3,$4}'

NAME TYPE DEVICE

bond0 bond bond0

eno1 ethernet eno1

eno2 ethernet eno2

eno3 ethernet eno3

eno4 ethernet eno4

Then

nmcli connection modify "connection-name" +ipv4.routes "network address/prefix gateway"

nmcli connection reload

nmcli connection up "connection-name"

Example:

sudo nmcli connection modify bond0 +ipv4.routes '172.16.0.0/12 192.168.0.1'

sudo nmcli connection reload

sudo nmcli connection up bond0