I have installed RHEL 5 in my pc with following configuration:

RAM-2GB

Processor : Intel,Dual Core

Motherboard : Asus-MX

The problem is when I configure the network setting i.e.,Ip address, Subnet mask and default gateway, the pc becomes very slow. For opening the terminal it takes 20-25 seconds.

Please help me.

Check your DNS settings first, unreachable name servers can slow things down

if that "terminal" is a ssh login to it then it sounds like the ipv6 dns look up

the FIRST thing is ( if you have not yet )to buy a license and make sure you are running the CURRENT 5 series -- RHEL 5.6
a license IS REQUIRED !!!!
Red Hat IS NOT FREE !!!


then is this a desktop or server
if server headless or not ?
is gnome or kde3 installed
Gnome is the default gui -- if installed --

did you disable the ipv6 dns look up ?
this is very well explained in the red hat support pages
http://www.redhat.com/support/

also why are you not using the auto dchp in rhel 5.5 or 6 ??
why is a manual set up needed ?

once installed rhel 5.5 /6 will auto set up the network connection , unless there is "intrAnet" local office network
then pointing it to the outfacing server should do it .

IF it is being slow loading an SSH term, make sure you:

edit /etc/ssh/sshd_config

Change the line from:
#UseDNS yes

to

UseDNS no

then do a

service sshd restart

or

/etc/init.d/sshd restart

that should speed up login during SSH connection.