Generate SHA1 hash for each file in a list

find . -type f -exec sha1sum {} >> SHA1SUMS \;
All output is placed in file SHA1SUMS which you can later check with 'sha1sum --check'. Works on most Linux distros where 'sha1sum' is installed.

2
By: gpenguin
2009-10-05 18:33:59

3 Alternatives + Submit Alt

What Others Think

I believe in bash this will append the output of the find command to SHA1SUMS rather than each invocation of sha1sums appending to the file (-exec doesn't use a shell to run sha1sums). Here the result is the same either way but worth mentioning.
bwoodacre · 479 weeks ago
Sorry, but I disagree. I just ran it and the SHA1SUMS file contains a list of files with their SHA1 hashes...same as 'md5sum'. Within 'find', everything up to the "\;" is used as the command to execute. Per the 'man find' page: "All following arguments to find are taken to be arguments to the command until an argument consisting of ?;? is encountered." HOWEVER, the man page does state the behavior of {} in find is different in other flavors of 'find'. So there are probably other differences with other flavors as well.
gpenguin · 478 weeks and 6 days ago

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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