Linux - Network configuration

Hi
on each VM that i want to create, i have IP static (create by network Admin).
Adresses are ready.
When i configure resolv.conf - is this is only for global configuration network or just for DNS ?

And more than this, where i can configure my network, to be connected with all others VM ?
Plus, i need to correct following errors, after pressing "Apt-get update" :
e: sub directory gpgv resend error code (1)
e:  method /usr.lib/apt/methods/gpgv doesn"t start
w: repository http://164.2.2.x.x does not hava a release file.
n: data from such a repository can't be authentificated and is therefore potentially dangerous to use.
n: see apt-secure(8) manpage for repository creation and user configuration details.
root@xxxx:#