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VNC on ubuntu via CLI

By default a fresh ubuntu install comes without ssh nor vnc. If installing ssh is as easy as

1sudo apt install ssh

enabling VNC via command line is not so trivial.

Just follow these steps as a regular user, superuser provileges are required only for some of them.

Make sure we have the vino package installed

1sudo apt install vino

User intervention (optional)

Disable any user intervention for establishing the connection (the default configuration requires an user to accept a remote connection)

1gsettings set org.gnome.Vino prompt-enabled false

Disable connection notification (optional)

You can disable the connection notification popup.

1gsettings set org.gnome.Vino notify-on-connect false

Set VNC as view-only (optional)

Maybe you don’t want to interfere to what the user is doing.

1gsettings set org.gnome.Vino view-only true

Encryption (optional)

Sadly a lot of VNC clients doesn’t support encryption, this is to get rid of it

1gsettings set org.gnome.Vino require-encryption false

Authentication

No password authentication

1gsettings set org.gnome.Vino authentication-methods "['none']"

Password authentication

just replace “mypassword” with a sensible one

1gsettings set org.gnome.Vino authentication-methods "['vnc']"
2THEPASS=$(echo -n mypassword | base64)
3gsettings set org.gnome.Vino vnc-password "$THEPASS"

Start the server

The VNC server is tight with a network connection profile. First, we have to get the id of the profile:

1nmcli connection show
2
3NAME                    UUID                                  TYPE      DEVICE
4Connessione via cavo 1  6a2988c0-3a73-37a7-943a-7529bcd78462  ethernet  ens160
5Connessione via cavo 2  628a3436-7e7f-3299-abca-664418ffb382  ethernet  ens192
6

And then we can bind the vnc server to a single connection:

1dconf write /org/gnome/settings-daemon/plugins/sharing/vino-server/enabled-connections "['6a2988c0-3a73-37a7-943a-7529bcd78462']"

Or to multiple connections:

1dconf write /org/gnome/settings-daemon/plugins/sharing/vino-server/enabled-connections "['6a2988c0-3a73-37a7-943a-7529bcd78462','628a3436-7e7f-3299-abca-664418ffb382']"

Manually Start the server

With this commands you can manually start the server, without relying on network profile association:

1export DISPLAY=:0
2/usr/lib/vino/vino-server &