Install software for Ubuntu PPA and delete PPA sources

1. Add a PPA source for Software Installation

Add a PPA Source

Sudo add-Apt-repository PPA: User/PPA-name

For example:

The PPA source to be added to install Ubuntu Tweak

Sudo add-Apt-repository PPA: tualatrix/PPA

2. Install software

After adding the PPA source, run:

Sudo apt-Get update

Sudo apt-Get install Ubuntu-tweak

3. Delete the PPA Source

Go to Settings> "software source" in the xinlide software manager, and delete the key of the PPA source to be deleted in identity authentication, and delete the added source in other software.

Then execute,Sudo apt-Get update