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linuxgzipmd5sum
ℕʘʘḆḽḘ
ℕʘʘḆḽḘ

Reputation: 19395

in linux, how to compute the md5 of several files at once, and put the output in a text file?

I have many files in mypath that look like file_01.gz, file_02.gz, etc

I would like to compute the md5 checksums for each of them, and store the output in a text file with something like

filename  md5
file01    fjiroeghreio

Is that possible on linux?

Many thanks!

Upvotes: 0

Views: 217

Answers (3)

Joe
Joe

Reputation: 7818

Linux already has a tool called md5sum, so all you need to do is call it for every file you want. In the approach below you get the default format of the md5sum tool, "SUM NAME", one per line for each file found. By using the double redirect (>>) each call will append to the bottom of the output file, sums.txt

#!/bin/bash
for f in *.gz; do
    md5sum "$f" >> sums.txt
done

The above is illustrative only, you should probably check for the pre-existence of the output file, deal with errors etc.

There's lots of ways of doing this, so it all depends on further requirements. Must the format be of the form you state, must it recurse directories etc.?

Upvotes: 1

Ruslan Osmanov
Ruslan Osmanov

Reputation: 21502

You can use the shell filename expansion:

md5sum *.gz > file

Upvotes: 1

mefju
mefju

Reputation: 539

md5sum file*.gz > output.txt

Output file is space separated, without header

Upvotes: 2

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