About Linux PPA source issues

Add PPA:

1, First enter Ubuntu system, System->administration->update manager->setting, in the software source interface, click Other software

tab, click Add in the bottom left corner to paste in the obtained PPA address.

2, can also be entered in the terminal,sudo gedit/etc/apt/sources.list, after pasting can be saved.

Next Please enter in the terminal,sudo apt-get update,
At this point, because the newly added PPA does not have a public key, the system prompts to add the corresponding public key. The hint has this: No_pubkey ABCDEFG; at this point, you need to run this command to add the public key,

sudo apt-key adv--recv-key-keyserver keyserver.ubuntu.com ******** (as in "7e5fa1ee")

After adding is complete, run again, sudo apt-get update

After these steps are complete, you can install the software sudo apt-get install FCITX

3.removal of cumbersome PPA addresses and public key Add, direct terminal execution:
sudo add-apt-repository ppa:fcitx-team/nightly (small blackbody )
sudo apt-get update
sudo apt-get install fcitx

This adds the source address of the software to be found here: cat/etc/apt/sources.list.d/xxx.list

Note: When a PPA source fails, the. list file is found according to the corresponding path and deleted;

About Linux PPA source issues