Failed to restart network.service: Unit network.service not found” in CENT OS 9
Network scripts are deprecated from Cent OS/Red Hat Enterprise Linux 8 and onward, no longer available by default. The new installation provides ifup and ifdown scripts which call "NetworkManager "
service and use nmcli interface to control network manager.
Version: Linux localhost.localdomain 5.14.0-354.el9.x86_64
So, you can use network manager instead and nmcli interface.
You may use ifdown/ifup commands. If these commands are not
working, Please Install package 'NetworkManager-initscripts-updown' and then
try again.