How to calculate a message digest on the command line

Calculating a message digest with OpenSSL on the command line is easy. You need to use the openssl dgst subcommand of the openssl tool. The documentation for this subcommand is available on the openssl-dgst man page:

$ man openssl-dgst

Let’s generate a sample file for further message digest calculation:

$ seq 20000 >somefile.txt

To check which message digest algorithms are supported in your version of OpenSSL, you can use the -list switch:

$ openssl dgst –list
Supported digests:
-blake2b512             -blake2s256             -md4
-md5                    -md5-sha1               -ripemd
-ripemd160&...