ESX 2.5.5: Changing DNS

Hi All,

I have got to change DNS on a group of ESX Hosts running 2.5.5.  I understand that i will have to use

VI /Etc/resolv.conf

But i cant find anywhere if i have to reboot the host once this change has been made.  The issue i have is i cant get hold of 2.5.5 from anywhere to test this before i run it on the live environment.

Any help will be greatly appriciated

Is there an alternative way to change the DNS