Install OpenVPN client in ubuntu

Due to PPTP might not available, OpenVPN can be a good choice.

Packages

apt install openvpn

Configuration file

Configuration file should be downloaded from OpenVPN server.

Test

openvpn --config client.ovpn

Enable option

In /etc/default/openvpn, enable following line

AUTOSTART="all"

Copy config file

cp client.ovpn /etc/openvpn/client.conf

Note: the file name should be client.conf

Enable password (Optional)

Change auth-user-pass to auth-user-pass pass in client.conf.

Then create account info in pass file, and change mode

chmod 400 /etc/openvpn/pass

Enable service

systemctl enable openvpn@client.service
systemctl daemon-reload
systemctl start openvpn@client

References

Linux - Autostart OpenVPN in systemd (Ubuntu)