tldr/pages/linux/sha1sum.md

sha1sum

Calculate SHA1 cryptographic checksums.

• Calculate the SHA1 checksum for a file:

sha1sum {{filename1}}

• Calculate SHA1 checksums for multiple files:

sha1sum {{filename1}} {{filename2}}

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

sha1sum -c {{filename.sha1}}