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Comments on Calculate the SHA1 checksum of a file

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Calculate the SHA1 checksum of a file

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How to calculate the SHA1 digest of a file in a shell?

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There's a sha1sum tool in GNU coreutils.

Here's

$ sha1sum emptyfile
da39a3ee5e6b4b0d3255bfef95601890afd80709  emptyfile

Note the spaces and the filename (emptyfile in this case) in the output. They may need to be accounted for in pipelines.

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2 comment threads

Please clarify "trailing spaces" (2 comments)
"touch file" could be confusing to newbies, it simply creates an empty file with filename `file` if i... (2 comments)
"touch file" could be confusing to newbies, it simply creates an empty file with filename `file` if i...
amarok‭ wrote 6 months ago

"touch file" could be confusing to newbies, it simply creates an empty file with filename file if it does not exist.

Iizuki‭ wrote 6 months ago

Fair point. I just wanted something that would reproduce the same digest, but touch isn't really required for this.