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In this question, we learn how to clean up the duplicate message warnings when running apt-get.

What I am wondering is are these duplicate source messages, blocking, which prevent updates or informational -- do they need to be cleaned up, or are just visual spam?

I can't tell if I have no updates, or if because of the duplicates its not checking further.

Rowan Hawkins
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1 Answers1

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In general, the lines that begin with W are warnings, those with an initial E indicate errors, and N indicates a Note. For example, 

W: http://repo.sinew.in/dists/stable/InRelease: Signature by key B6DA722E2E65721AF54B93966F7565879798C2FC uses weak digest algorithm (SHA1)
E: Failed to fetch http://extras.ubuntu.com/ubuntu/dists/xenial/main/source/Sources  404  Not Found [IP: 91.189.92.152 80]
^

For these two, there's nothing to be done at your end for the "weak digest algorithm" - it causes no active harm. However, the "404" error indicates a failure that should be fixed, as it describes a lack of connection/misconfiguration.

In general, in the Linux/Unix world, silence implies success. If the program issues a message, you should least consider it, and try to figure out what it means.

waltinator
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