How to install and uninstall .deb file on ubuntu

I have tried this about at least 1 week ago.

We'll use Terminal to apply this manner.

For installing .deb file, you should open terminal and type this code:

sudo dpkg -i "directory_package.deb"

example: sudo dpkg -i /home/user/Download/blog.deb

Then, if password is required, you should type it.

• Remove or Uninstall .deb file

Open Terminal and type this code:

sudo dpkg -r "directory_package.deb"

example: sudo dpkg -r /home/user/Download/blog.deb

Password always required if you are not in MASTER USER mode.
Master User: sudo su       ----->      Enter     ----->       Password