$ sudo apt install mintupgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package mintupgrade

$ sudo apt-get install mintupgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package mintupgrade

Main (quina) http://packages.linuxmint.com
Base (trusty) http://archive/ubuntu.com/ubuntu