The right click on your touchpad stop working after installing Ubuntu, on Dell laptop Inspiron 13,
How to alter your Ubuntu touchpad settings

There are a couple of options depending on how you are looking to change the touchpad:
SLN316799_en_US__1icon Note: Here are a couple of quick ways to open a terminal window in Ubuntu:

Opern the terminal click start and search “Terminal” or Press the CTRL + ALT + T keys down together
Click the Dash button or press the Windows key and type terminal and press Enter

Changing the Touchpad click settings.

Type the following command and press the Enter key to revert to the right click:

:~$ gsettings set org.gnome.desktop.peripherals.touchpad click-method areas

Bringing up a GUI (Graphical User Interface) with additional configuration settings

Type the following command and press the Enter key to install a tweak tool GUI:


:~$ sudo apt install gnome-tweak-tool


SLN316799_en_US__1icon Note: sudo gives the instruction to run with administrator privileges, you need an admin password and rights for this.

Type the following command and press the Enter key to open the Tweak tool GUI:

gnome-tweaks