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Recursively md5sum all files in a directory tree

After a server crash a wanted to compare all actual files with the backuped data. An easy way is to compare the md5 hashes like that:

First create recursively md5 hashes from all files in that directory:

find ./backup -type f -print0 | xargs -0 md5sum > /checksums_backup.md5

Then check the actual data:

md5sum -c checksums_backup.md5

I was lucky, no files where damaged.

Post a comment — Trackback URI RSS 2.0 feed for these comments This entry (permalink) was posted on Saturday, October 25, 2008, at 11:31 am by Michael, tagged with Linux, Shell and categorized in English posts, Shortcuts.
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3 Comments

tante wrote:

find ./backup -type f -exec md5sum {} \;>> /checksums_backup.md5

Läuft meiner Erfahrung nach oft schneller als xargs. Vielleicht in diesem Falle nicht ganz so relevant, aber für andere Fälle

Posted on 25-Oct-08 at 2:31 pm | Permalink
Michael wrote:

Danke
Ich hoffe, ich brauch’s nicht so schnell wieder.

Posted on 25-Oct-08 at 5:13 pm | Permalink
sahar wrote:

why when used md5sum i encountered to no such file or directory!?,…

#!/bin/sh
chksumfile=’tmp’
`md5sum -c “$chksumfile”`
———————-
# sh verifychksum.sh
verifychksum.sh: line 3: chksum/ss/RecoverDataLinuxTrial.tar.gz:: No such file or directory
================================
while when i run command line :

# md5sum -c tmp
chksum/ss/RecoverDataLinuxTrial.tar.gz: OK
chksum/ss/zziplib-0.13.49-8.fc12.i686.rpm: OK
chksum/RecoverDataLinuxTrial.tar.gz: OK
chksum/zziplib-0.13.49-8.fc12.i686.rpm: OK
chksum/s: OK
chksum/chsum: OK

Posted on 19-Jun-11 at 8:14 am | Permalink

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EpiJunkie » Blog Archive » Data verification after building a RAID 5 array using FreeNAS on 23-Oct-10 at 6:13 pm

[...] support going through each folder and checksuming each file and outputting the sums. Sure there are one line shell scripts/commands you can run but I was really looking for a way that would not require hacking about. I finally found what I was [...]

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