IP Networking

Yeah after network stop and start the configurations are all gone. That's probably because ifconfig uses ioctl. I made a simple programm that uses ioctl for changing the IP, I can give it to you if you want, but after rebooting the new configurations are gone.
To tell you the truth I do not know why there are so many files doing the same thing. Probably because these configurations are vendor dependent. (Especially red hat tends to change everything, I still don't understand why they do not provide the kernel source code in /usr/src/linux)

The RedHat team uses a tool called linuxconf to configure the system, which is a control panel for all system services. Under te section Config/Networking/Server Tasks there is a line named IP Aliases for virtual hosts, where you can select the interface for which you want to make an alias. All you have to do is to add the IP address and the netmask and you're done. Changes are active just after reboot.

hi,
I have the same request on a SUN server, Can I do that safely ?
but where is the magic file to modify ?

Yeah if you read the command above i think they work but maybe with a little bit of difference (see the man pages)
but the file you're looking for it to edit manually is not called (eth0)
I've forgotten the real name but ...
It should be something like prg0 or ....

ok thx, the /etc/sysconfig/networking/devices/ifcfg-eth0 files doesn't exist on my OS that's why i found an other way to resolv it.

for my Sun Server with Solaris 8 :

I added an entry in /etc/hosts
xxx.xxx.xxx.xxx 'hostname'2

I already had the /etc/hostname.eri0
I created /etc/hostname.eri0:1
with in this file the 'hostname'2

and it's working

there is another very good tool on redhat linux to configure your networking. "netconf" it's very simple to use.