다음 명령 sudo apt-get update에서 오류가 발생했습니다(일부 오류가 제거되었습니다).

Err http://ppa.launchpad.net trusty/main i386 Packages                         
  404  Not Found
Translation-en_IN           
Ign http://packages.linuxmint.com rebecca/upstream Translation-en              
Fetched 284 kB in 11s (23.9 kB/s)                                              
Reading package lists... Done

W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://extra.linuxmint.com rebecca Release: The following signatures were invalid: BADSIG 3EE67F3D0FF405B2 Clement Lefebvre (Linux Mint Package Repository v1) <[email protected]>

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty/Release  Unable to find expected entry 'restricted/binary-amd64/Packages' in Release file (Wrong sources.list entry or malformed file)



W: Failed to fetch http://packages.linuxmint.com/dists/rebecca/main/binary-i386/Packages  Hash Sum mismatch

W: Failed to fetch http://ppa.launchpad.net/chris-lea/munin-plugins/ubuntu/dists/trusty/main/source/Sources  404  Not Found

W: Failed to fetch http://ppa.launchpad.net/chris-lea/munin-plugins/ubuntu/dists/trusty/main/binary-amd64/Packages  404  Not Found

W: Failed to fetch http://ppa.launchpad.net/chris-lea/munin-plugins/ubuntu/dists/trusty/main/binary-i386/Packages  404  Not Found

W: Some index files failed to download. They have been ignored, or old ones used instead.