(Instr dla Xubuntu)
Nie ma co się obcyndalać, tylko od razu instalować, jak leci:
sudo apt install openconnect network-manager network-manager-config-connectivity-ubuntu network-manager-gnome network-manager-openconnect-gnome network-manager-openconnect network-manager-openvpn-gnome network-manager-openvpn network-manager-pptp-gnome network-manager-pptp