"Invalid filename extension" and "Type is not known" when I run `sudo apt-get ...` commands
249
How do I fix this "E: Type '*' is not known on line * in source list ..." update error?
96696
timeout errors in apt-get update/install
12960
How to fix "not a valid identifier" error after setting environment variables?
95593
sudo apt-get update returns an error
71783
How to set up a default program opening an unknown file extension?
38110
Error sudo: add-apt-repository: command not found
117447
bash: how do you return file extensions?
79330
what does "sudo apt-get install aptitude" do?
144036
sudo apt-get curl and sudo apt-get wget gives "Invalid operation"
119610
500 Internal Server Error whenever I use apt-get
1512
Make apt-get (or aptitude) run with -y but not prompt for replacement of configuration files?
97588
sudo apt-get 'NOSPLIT Error'
13744
sudo apt-get update failing - "could not open" list file due to "permission denied"
21382
What does "sudo apt-get update" do?
22164
Problem with sudo apt get update: The repository cdrom... does not have a Release file
41309
What are reserved filenames for various platforms?
15494
Why can't apt resolve names?