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Editorial Team
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Asked: 2026-05-12T15:04:03+00:00

For example, if ./configure or Make tells me I’m lacking libX11.so.6, and it’s nowhere

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For example, if ./configure or Make tells me I’m lacking libX11.so.6, and it’s nowhere on my system, is there a tool or website into which I could type

libX11.so.6

followed by a distribution/arch and get back

libx11-6
libx11-6-debug [or whatever; asking README would probably return reams of entries]

http://sysinf0.klabs.be/ does something similar for some distributions and architectures, but it doesn’t seem to have more recent distributions. Also, they don’t have an entry for the filename so you need to Google “packagename site:sysinf0.klabs.be”.

I’m most interested in Ubuntu, but it would be good to know about similar tools for other distributions as well.

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1 Answer

  1. Editorial Team

    Debian does that via the website:

    • search the Packages page under Search contents of packages
    • the answer in this example
    • options selected where ‘packages that contain files whose name contain the keyword’ for the unstable distribution (as it is the largest) on ‘any’ architecture

    Ubuntu probably does something similar but I don’t know the website / launchpad that well.

    You could also fetch the index file ftp://ftp.us.debian.org/debian/dists/sid/Contents-i386.gz but as it changes frequently the website option is probably more convenient.

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