I did that.
By the way, CLI appears under System, not Services in my WEBUI.
On vi resolve.conf, following appears:
search lan
nameserver 127.0.0.1
nameserver ::1
Don't know if 'nameserver ::1' is correct (semicolons, blank fields)!
Then command 'I'
Moved to blank line after 'nameserver ::1'
Inserted nameserver 8.8.8.8
'esc' and ?:wq'
Checking with 'vi resolve.conf', following appears:
search lan
nameserver 127.0.0.1
nameserver ::1
nameserver 8.8.8.8
Should be OK.
Pinged IP 8.8.8.8: OK
Pinged www.google.cl: "Error:ping: bad address 'www.google.cl'"
Rebooted
CLIed and vi resolv.conf to verify, but change wasn't saved.
File is the same as when started: Line 'nameserver 8.8.8.8' doesn't appear.
Deleted line 'nameserver ::1', suspecting that it might be incorrect.
Saved, checked again and it should be OK:
search lan
nameserver 127.0.0.1
nameserver 8.8.8.8
Pinged again, but on address: "Error:ping: bad address 'www.google.cl'"
Rebooted
CLIed and vi resolv.conf to verify, but again change wasn't saved.
Clueless.