Verify a file has not been tampered with since dpkg installation

cat /var/lib/dpkg/info/*.md5sums|grep usr/sbin/sshd|sed 's,usr,/usr,'|md5sum -c
Replace "user/sbin/sshd" with the file you would like to check. If you are doing this due to intrusion, you obviously would want to check size, last modification date and md5 of the md5sum application itself. Also, note that "/var/lib/dpkg/info/*.md5sums" files might have been tampered with themselves. Neither to say, this is a useful command.
Sample Output
/usr/sbin/sshd: OK

0
By: Ztyx
2013-03-12 11:20:48

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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