How to change nameservers WITHOUT editing resolv.conf???

12-02-2008	#1 (permalink)
nixnotes Just Joined! Join Date: Feb 2006 Location: Pittsburgh Posts: 32	How to change nameservers WITHOUT editing resolv.conf??? I am looking for ways to update or change nameservers listed on remote linux machines via the command line. For years I have attempted to do this with a package called 'netconfig' (these are fedora boxes) but netconfig has a bug that causes the nameservers not to be updated with the supplied info on the first attempt. Usually, and this is especially true when going from DHCP to static, a second netconfig attempt is required to get the nameservers to update. I'd like to find a more reliable way to do this. Are there any command line tools that take a nameserver as an argument and updates resolv.conf accordingly? something along the lines of 'ifconfig' is what I am looking for, although I know ifconfig cannot be used to change nameservers. In all the googling I have done the only command line related option that I could find for updating nameservers is to manually edit the resolve.conf file and this is not really an option for my application. I need to be able to issue a command to the system to get the job done. Does anyone here have any good suggestions?
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12-02-2008

#2 (permalink)

HROAdmin26

Linux Engineer

Join Date: Nov 2007

Posts: 968

Quote:

Are there any command line tools that take a nameserver as an argument and updates resolv.conf accordingly?

Write your own (rough overview):

Code:

#!/bin/bash
# Assumes nameserver IP is passed on the command line and updates resolv.conf
# Could also add support to check command line for any number of nameservers.

NS=$1 # ===> First command line argument

echo "nameserver $1" > /etc/resolv.conf #===> Overwrites resolv.conf and adds only the nameserver

exit

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