How do I run Grub Customizer after installing?
I'm new to Ubuntu and have attempted to install Grub Customizer in 18.04. Firstly I have what looks like error messages, and secondly I don't know how to run it.
Terminal window extract:
>>>
sudo add-apt-repository ppa:n-muench/burg -y && sudo add-apt-repository ppa:danielricht
[sudo] password for ray:
Ign:1 http://
Hit:2 http://
Get:3 http://
Get:4 http://
Err:5 http://
404 Not Found [IP: 91.189.95.83 80]
Hit:6 http://
Get:7 http://
Get:8 http://
Reading package lists... Done
E: The repository 'http://
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
<<<
1. 404 Not found and the last three lines don't look promising.
2. If I do successfully install and update, how do I run it?
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