Не удается установить команду «Make» [дубликат]

После обновления с 13.10 до 14.04 я получаю эти раздражающие сообщения каждый раз, когда устанавливаю, обновляю, обновляю и так далее:

N: Ignoring file 'webupd8team-java-raring.list.disable' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension 
N: Ignoring file 'bumblebee-stable-raring.list.disable' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension 
N: Ignoring file 'steam.list.disable' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
N: Ignoring file 'ubuntu-x-swat-x-updates-raring.list.disable' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
N: Ignoring file 'xorg-edgers-ppa-raring.list.disable' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
N: Ignoring file 'webupd8team-java-raring.list.disable' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
N: Ignoring file 'bumblebee-stable-raring.list.disable' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
N: Ignoring file 'steam.list.disable' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
N: Ignoring file 'ubuntu-x-swat-x-updates-raring.list.disable' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
N: Ignoring file 'xorg-edgers-ppa-raring.list.disable' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension

Как мне исправить основную проблему, указанную в сообщении?

edit: Иногда я получаю дополнительные сообщения, добавленные к сообщениям выше:

W: GPG error: http://www.duinsoft.nl debs Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY E18CE6625CB26B26
W: Failed to fetch http://ppa.launchpad.net/person/ppa/ubuntu/dists/karmic/main/binary-amd64/Packages  404  Not Found

W: Failed to fetch http://ppa.launchpad.net/person/ppa/ubuntu/dists/karmic/main/binary-i386/Packages  404  Not Found

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

А иногда я могу добавить другие, но я больше не могу найти точные сообщения.