How do I remove all repositories which don’t exist for one reason or another? I am wondering if there is a command to do this, so that I can remove all such repositories at once. I am running Ubuntu 14.04.
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What is your definition of "don't exist"? I would assume a PPA you added does exist? – Rinzwind Nov 28 '15 at 17:42
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"Non-existant"? You mean ones that either never existed or have been shutdown and actually take down? – Nov 28 '15 at 17:42
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I think he means those repos that might have been active but are no more active. I think he wants to "clean up" the repo list – 842Mono Nov 28 '15 at 18:29
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Perhaps looking for orphaned or obsolete packages? https://askubuntu.com/questions/286947/obsolete-packages-vs-orphaned-packages – Nathaniel M. Beaver Jun 26 '16 at 23:42