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With rpm -qV openssh-server I will get a list of files that have changed compared to default.

~$ rpm -qV openssh-server
S.?....T.  c /etc/ssh/sshd_config

Can dpkg on Ubuntu do the same?

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3 Answers

up vote 11 down vote accepted

I don't thinks so, in Ubuntu md5 checksums are only stored for certain files. For any given package the list of files that have checksums can be found in




These generally don't contain a complete list of the files that have been installed by a package e.g. openssh-server.md5sums

bb5096cf79a43b479a179c770eae86d8  usr/lib/openssh/sftp-server
42da5b1c2de18ec8ef4f20079a601f28  usr/sbin/sshd
8c5592e0d522fa0f8f55f3c104479ef5  usr/share/lintian/overrides/openssh-server
cfcb67f58bcd1edcaa5a770863e49304  usr/share/man/man5/sshd_config.5.gz
71a51cbb514da3044b277e05a3ceaf0b  usr/share/man/man8/sshd.8.gz
222d4da61fcb3c65b4e6e83944752f20  usr/share/man/man8/sftp-server.8.gz

You can use the debsums command (sudo apt-get install debsums) to check the files that have md5 signatures

debsums openssh-server
/usr/lib/openssh/sftp-server                                                  OK
/usr/sbin/sshd                                                                OK
/usr/share/lintian/overrides/openssh-server                                   OK
/usr/share/man/man5/sshd_config.5.gz                                          OK
/usr/share/man/man8/sshd.8.gz                                                 OK
/usr/share/man/man8/sftp-server.8.gz                                          OK
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The md5sums omit config files ( ones in /etc ) because you are expected to change those. –  psusi Oct 18 '11 at 16:06
Yes, the file /etc/ssh/sshd_config for example is generated by a script. Under CentOS though the default config files do have md5sums. –  Iain Oct 18 '11 at 16:49
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Normally I have a list of files that I want to verify.
So here's a simple bash alias that does more or less what you want:

dpkg-verify() {
    for file in $*; do
        pkg=`dpkg -S "$file" | cut -d: -f 1`
        if [ -s "$hashfile" ]; then
            rfile=`echo "$file" | cut -d/ -f 2-`
            phash=`grep -E "$rfile\$" "$hashfile" | cut -d\  -f 1`
            hash=`md5sum "$file" | cut -d\  -f 1`
            if [ "$hash" = "$phash" ]; then
                echo "$file: ok"
                echo "$file: CHANGED"
            echo "$file: UNKNOWN"
    return $exitcode

Use like this:

dpkg-verify /bin/ls /usr/bin/ld

Output on my environment:

/bin/ls: ok
/usr/bin/ld: UNKNOWN

Of course, it should be fairly simple to write a similar alias/script to check the files from a specific package.

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There is tool debsums you can check out.

# apt-cache search debsums
debsums - tool for verification of installed package files against MD5 checksums
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