Linux--add the PPA to your system

Add a PPA to your system

　　with a single line in your terminal

　　　　step1:on the PPA's overview page,look for the heading that reads Adding this PPA to your system.Make a note of the PPA's location, which looks like:

　　　　　　paa:gwibber-daily/ppa

　　　　step2:open a terminal and enter:

　　　　　　sudo add-apt-repository paa:user/ppa-name　　// replace ppa:user/ppa-name with the PPA's location that you noted above.

　　　　　　// your system will now fetch the PPA's key.This enables your ubuntu system to verify that the packages in the PPA habe not been interfered with since they were built.

　　　　step3:now as a one-off,you shuld tell your system to pull down the latest list of software from each archive it knows about,including the PPA you just added:

　　　　　　sudo apt-get update　　// ready to start installing software from the PPA!

　　with editting /etc/apt/sources.list

　　　　　　sudo vim /etc/apt/sources.list

　　　　　　deb [trust=true] http://ppa.xxx.xxx/xx/xx/xx xxx main

　　　　　　deb-src [trust=true] http://ppa.xxx.xxx/xx/xx/xx xxx main