Ubuntu dock is not available after upgrade to 18.04

I have recently upgraded to 18.04, but had some issues during upgrade which resulted in absence of dock. Dock tab is also empty in settings. How can I install dock and enable it?

Update:

this is how my dock settings look

Solution 1:

You can check whether Ubuntu dock is installed by running the following command in Terminal

apt-cache policy gnome-shell-extension-ubuntu-dock | grep Installed

If the output is Installed: (none) then it is not installed and you can install it by running

sudo apt install gnome-shell-extension-ubuntu-dock

Otherwise there is a possibility that you're not in the default Ubuntu session. When you boot your system and get to the GDM login screen you should find a cogwheel (⚙️) next to the sign in button. If you click on the cogwheel you should find an Ubuntu (and Ubuntu on Wayland) option. Select it and then log in.

As @Videonauth pointed out, you may also use the "Dash to Dock" extension (Ubuntu dock is a fork of Dash to Dock) as a workaround. You can install it by running

sudo apt install gnome-shell-extension-dashtodock

or from here. You can then manage your installed extensions using gnome-tweaks.