How do I edit resolv.conf? [closed]

Question

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

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