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I want to install sudo. So I type in pacman -S sudo. But then I get the following errors:

warning: database file for 'extra' does not exist
warning: database file for 'community' does not exist
error: failed to prepare transaction (could not find database)

How do I install the database files for 'extra' and 'community'? I am in Arch Linux.

1 Answer 1

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Firstly, try running pacman -Syy, then try to install sudo again.

Check that the repositories are uncommented in /etc/pacman.conf.

Or your mirrorlist might be outdated: Generate a current list of mirrors and copy it to /etc/pacman.d/mirrorlist

Quoting from this relevant forum thread:

You can:

  • pick another mirror
  • try using an http mirror, not an ftp one (pick http mirror from the mirrorlist).
  • Alternatively you can manually download the databases with:

    wget ftp://mirror.csclub.uwaterloo.ca/archlinux/community/os/x86_64/community.db
    wget ftp://mirror.csclub.uwaterloo.ca/archlinux/extra/os/x86_64/extra.db
    

    move them to /var/lib/pacman/sync/ and run 'pacman -Syu' again. If you find any *.part files in /var/lib/pacman/sync/ e.g. /var/lib/pacman/sync/core.db.part - remove them.

To prevent having problems like these it is critical to understand pacman. To learn more about using pacman, see the ArchWiki pacman article, and consult man pacman.

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