How do I edit resolv.conf? [closed]

Question

I need to setup OpenDNS, but I can't edit resolv.conf

Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8) DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN nameserver 127.0.1.1 search gateway.2wire.net 

Answer 1

Your system uses resolvconf, so the resolv.conf file is replaced by a symbolic link to /etc/resolvconf/run/resolv.conf and resolvconf dynamically generated the file. That's why DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN

To properly update the information in the file, you can put the dns-* parameters in /etc/network/interfaces e.g.

auto eth0 iface eth0 inet static      address 33.33.13.10      netmask 255.255.255.0      gateway 33.33.13.1      dns-nameservers 33.33.13.1 12.34.56.78      dns-search example.com 

Then, you can update the dns-* info by

$ resolvconf -d eth0 $ resolvconf -a eth0 

Or you can do ifdown & ifup and resolvconf -d, -a will happen behind the scenes.

Note: sometimes I find resolvconf -u doesn't work. I don't know why

You should read man resolvconf. There's more information about all this.

TIP: if you want to update /etc/resolv.conf manually, you can remove the symlink and create /etc/resolv.conf by hand. This way, the file won't get updated from resolvconf ever.

    $ rm /etc/resolv.conf         ;# to remove the symlink     $ vi /etc/resolv.conf         ;# to create a regular file