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sha1sum

Calculate SHA1 cryptographic checksums. More information: https://www.gnu.org/software/coreutils/sha1sum.

  • Calculate the SHA1 checksum for a file:

sha1sum {{filename1}}

  • Calculate SHA1 checksums for multiple files:

sha1sum {{filename1}} {{filename2}}

  • Calculate and save the list of SHA1 checksums to a file:

sha1sum {{filename1}} {{filename2}} > {{filename.sha1}}

  • Read a file of SHA1 sums and verify all files have matching checksums:

sha1sum --check {{filename.sha1}}

  • Only show a message for files for which verification fails:

sha1sum --check --quiet {{filename.sha1}}