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How do I find the package that provides a file?

My mount utility doesn't support ext4, so I plan to update it. How to determine which package contain an app, such as mount?

sudo apt-get install

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3 Answers 3

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sudo apt-get install apt-file
sudo apt-file search <filename>

What version of ubuntu are you using? If the kernel supports ext4, mount should!

Make sure you're using the correct syntax

mount -t ext4 /dev/sdax /dir

if its a currently installed package (which mount is), you can also do

dpkg -S /bin/mount
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  • Thanks, but it fails: $ sudo apt-file search mount sudo: apt-file: command not found $ sudo cat /proc/version Linux version 2.6.24-24-generic (buildd@palmer) (gcc version 4.2.4 (Ubuntu 4.2.4-1ubuntu4)) #1 SMP Tue Jul 7 19:46:39 UTC 2009
    – soul2003
    May 20, 2011 at 2:33
  • It seems no apt-file command.
    – soul2003
    May 20, 2011 at 2:34
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    you need to install apt-file first, sudo apt-get install apt-file
    – freethinker
    May 20, 2011 at 2:36
  • however in your case, dpkg -S should work
    – freethinker
    May 20, 2011 at 2:36
  • My kernel doesn't support ext4. I have checked /proc/filesystem
    – soul2003
    May 20, 2011 at 2:45
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http://packages.ubuntu.com/

Enter "ext4" and click on Description and search. You will soon see that you should have e2fsprogs installed to have full ext4 support (mostly fsck). The kernel controls whether you can mount, though.

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First, direct answer to your question:

dpkg -S will return a list of all packages which have files matching that string. You probably want to pass the full path (which you can using which)

which mount -> /bin/mount dpkg -S /bin/mount -> mount

Also, apt-cache search ext4 will return all of the packages which use ext4. I'd expect you're more likely to need to update e2fsprogs than mount

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