Changing IP's via scripts

[Jim Lynn_1]

We are changing out our networks and I need a script that will change the IP address and netmask then reboot the machine after the change. Anybody done this before ?

[Sridhar Bhaskarla]

Hi Jim,

The best way is to update your /etc/rc.config.d/netconf file.

#cp /etc/rc.config.d/netconf /etc/rc.config.d/netconf.old
#vi /etc/rc.config.d/netconf

Make changes to reflect your new IP address and netmasks.

#shutdown -h now

Let your network people change the configuration and bring up the server. It should come up with the configuration you specified in netconf file.

-Sri

[ITeam]

Jim,

Dont copy the netconf file to netconf.old in the same directory. Copy it somewhere else like /tmp instead. I did exactly the same thing once and as the system came back up, the netconf file was read first and then the netconf.old file was read, putting all of the network settings back to what I had changed them from. Took me a while to realise what was happening.

[Pete Randall · Accepted solution]

For a script, you might want to look at /sbin/set_parms. Do a man on set_parms.

Pete

[Paul Sperry]

I did this to about 100 workstations when we changed our network

you will need to edit the following files.

/etc/rc.config.d/netconf
/etc/hosts
/var/adm/inetd.sec

edit the files to reflect the new IPs and netmask. shutdown the systems the put then on the new network and they should come up fine

[Sridhar Bhaskarla]

/sbin/init.d/net script reads directly from /etc/rc.config.d/netconf. But most of the other /sbin/init.d/ files run /etc/rc.config script that in turns runs each configuration file under /etc/rc.config.d/ directory.

So, though it doesn't affect here, I agree that it is a good practice not to keep the backup files in /etc/rc.config.d directory.

Good point Alpha Numeric Systems.

-Sri