SHA-256 is the recommended stronger alternative to SHA-1. See FIPS PUB 180-4 for implementation details.

Either by using a dedicated library or implementing the algorithm in your language, show that the SHA-256 digest of the string "Rosetta code" is: 764faf5c61ac315f1497f9dfa542713965b785e5cc2f707d6468d7d1124cdfcf

sha256 rc.txt
764FAF5C61AC315F1497F9DFA542713965B785E5CC2F707D6468D7D1124CDFCF rc.txt (12 bytes)