apt update

~/games/AlephOne-20150620$ sudo apt update
Hit:1 http://us.archive.ubuntu.com/ubuntu xenial InRelease
Hit:2 http://ppa.launchpad.net/knapsu/openxcom-beta/ubuntu xenial InRelease
Hit:3 http://ppa.launchpad.net/wine/wine-builds/ubuntu xenial InRelease
Reading package lists... Done
Building dependency tree
Reading state information... Done
5 packages can be upgraded. Run 'apt list --upgradable' to see them.