CUPS / Samba / Wireless Printing randomly stops working on Ubuntu

CUPS, linux, samba

I’ve setup a CUPS (Common Unix Printing System) wireless printer sharing in our office, and occasionally the wireless printing randomly stops working. In addition, Samba also stops for file sharing. This kind of behaviour is normally coupled with the LAN/Wireless connection dropping, so you cannot even SSH into the machine itself.

There is no need to restart the computer, just restart the network-manager from the machine itself.

sudo service network-manager restart