Hi i am trying to update the ubuntu 16.04 it's showing the following error
W: The repository 'http://ppa.launchpad.net/n-muench/programs-ppa/ubuntu xenial Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Failed to fetch http://ppa.launchpad.net/n-muench/programs-ppa/ubuntu/dists/xenial/main/binary-amd64/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
i cant install filezilla without fix this error. i have tried all the solution but it's give's me the same error please help me to fix this error.
sudo add-apt-repository universe
,sudo apt-get update
,sudo apt-get install filezilla
. – N0rbert Feb 10 '18 at 21:15