If you're looking to restart network-manager, you'll want to do 'sudo restart network-manager', not 'sudo restart networking'.
If you're making changes to /etc/network/interfaces, running "ifup -a" will usually suffice to apply the changes. (or you can "ifdown <interface>", then "ifup <interface>".
If you're looking to restart network-manager, you'll want to do 'sudo restart network-manager', not 'sudo restart networking'.
If you're making changes to /etc/network/ interfaces, running "ifup -a" will usually suffice to apply the changes. (or you can "ifdown <interface>", then "ifup <interface>".