Linux in a Nutshell, 6th Edition

Name

sha1sum

Synopsis

sha1sum [option] [files]

Compute or check 160-bit SHA1 checksums to verify file integrity. If the file is not specified, or specified as -, read from standard input.

Options

-b, --binary

Read files in binary mode.

-c, --check

Read and check the SHA1 sums in the files (or standard input) and verify that they are consistent. The input must have been generated by an earlier sha1sum command.

--help

Print usage information and exit.

--status

Don’t generate output messages; the exit code indicates success or failure. Used only with --check.

-t, --text

Read files in text mode. The default.

--version

Print version information and exit.

-w, --warn

Warn about improperly formatted checksum lines. Used only with --check.