Name

sha1sum

Synopsis

    sha1sum [options] [file ...]
    sha1sum [options] --check [file]

Compute or check SHA1 160-bit checksums for one or more files. The checksum is computed using the algorithm in FIPS-180-1. Use the saved output of the program as input when checking. See also md5sum.

Options

-b, --binary

Use binary mode to read files. This is the default on non-Unix systems.

-c, --check

Check SHA1 sums against the given list.

--status

Do not print anything. Instead, use the exit code to indicate success.

-t, --text

Read files in “text” mode. This is the default on Unix systems.

-w, --warn

Warn about checksum lines that are not formatted correctly.

Examples

$ sha1sum bash-3.0.tar.gz > SHA1SUM    
                     Compute and save checksum
    $ cat SHA1SUM                          
                     Show it
    3acf1ff4910d4bc863620c7533cbf4858370017b  bash-3.0.tar.gz
    $ sha1sum --check < SHA1SUM            
                     Verify it
    bash-3.0.tar.gz: OK

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