sha1sum

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

sha1sum path/to/file1 path/to/file2 ...

sha1sum path/to/file1 path/to/file2 ... > path/to/file.sha1

command | sha1sum

sha1sum --check path/to/file.sha1

sha1sum --check --quiet path/to/file.sha1

sha1sum --ignore-missing --check --quiet path/to/file.sha1