The command-line tool for Private Internet Access, a commercial VPN provider. More information: https://helpdesk.privateinternetaccess.com/kb/articles/pia-desktop-command-line-interface-part-1.
piactl login path/to/login_file
piactl connect
piactl disconnect
piactl background enable|disable
piactl get regions
piactl get region
piactl set region region
piactl logout