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    Tips 'n' Tricks: Handy commands to access packages
    Posted on Monday, April 02 @ 21:27:54 BST

    Debian
    Yep, so you've heard all about Debian's super-duper packaging system,
    how it's the best thing that ever happened in the Linux package manager world,
    etc., etc.. But how do you actually *use* the powerful tools?

    Here are some very useful commands that I've come to learn, but it took
    me quite a while to dig them up, so I'm posting it here in the hopes that
    it will be useful. To other Debian gurus: please add your suggestions/tips
    here too.

    • I've come across this file in /etc/something/or/other.txt,
      and I want to know which package it belongs to. How?

      dpkg -S /etc/something/or/other.txt

    • I want to find out what exactly is installed by package XYZ. How?

      dpkg -L XYZ

      This lists all the files installed by package XYZ. You can filter
      it through grep to obtain more specific information: for example,
      to list all the binaries provided by package XYZ, do this:

      dpkg -L XYZ | grep bin/

    • I'm tight on hard drive space, and package XYZ looks like a candidate
      for removal. How do I check which packages depend on it, so that I know
      whether or not it's safe to remove? Or, how do I find out the size of a
      package?

      dpkg -p XYZ will print out the control information
      for a package. This includes which packages XYZ depends on, and the package
      size.

      But it doesn't answer the whole question. So here's what I do:

      apt-get -s remove XYZ

      Make sure you have the -s there!! This command will pretend to
      uninstall XYZ, and apt-get will tell you what other packages (if any) will
      be removed if you remove XYZ. This means that the other packages depend
      on XYZ. If apt-get doesn't list any other packages to be removed, it means
      that nothing depends on XYZ. However, you should check the package description
      (dpkg -p XYZ) to make sure that XYZ isn't part of something you
      actually use or need.

    • I've recently upgraded/installed a lot of packages, and my
      /var partition seems to be filling up real fast! What's happening?
      What's happening? apt-get is caching the package files it downloaded, in /var/apt/cache/....
      If you have a small /var partition (like me), it's useful to occasionally
      clean it out:

      apt-get clean

    • Here's a not-so-well-known fact about dpkg: it understands
      shell globbing metacharacters (such as the wildcard *). For example, here's
      one way to list all Tcl packages:

      dpkg -l 'tcl*'

      The backslash is required so that the * gets through to dpkg
      untouched by the shell, which might mistakenly think you're trying to
      glob for a filename if you don't have the backslash. update the article broke the backslash.. and we changed it to quotes.. (which is a better practise in some cases)

    Article was contributed by anonymous user

     
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  • "Tips 'n' Tricks: Handy commands to access packages" | Login/Create Account | 4 comments
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    The comments are owned by the poster. We aren't responsible for their content.

    Re: Handy commands to access packages (Score: 2, Informative)
    by danish on Sunday, June 10 @ 21:49:40 BST
    (User Info)

    Note that there is a nice Debian package, dlocate, which runs faster than dpkg and performs many of the same searching operations (-l, -L, -S, etc.)

    [ Reply ]


    wajig (Score: 0)
    by Anonymous on Sunday, April 07 @ 17:42:55 BST

    Try wajig. It has a lot of nifty options for package management, and it even runs sudo for you when you're doing something requiring root privileges.

    [ Reply ]


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