I have 30 linux servers that I need to change subnetmask. I want to use a simple script or a simple command to change the subnemt mask from 255.255.255.128 to 255.255.255.0 in ifcfg-eth0.
can someone please help? Thanks, Elad.
A simple sed
command like this will do it:
$ sudo sed -i 's/NETMASK=255.255.255.0/NETMASK=255.255.255.128/' /etc/sysconfig/network-scripts/ifcfg-eth0
You can combine this sed
command with SSH command to execute this on each server using the a command like:
$ ssh user@server command