How To: Validate Sha Checksums With Shasum And Grep

Assuming the key is 408b53542d967458c8a51ba0d4079956c853b30a029dea6df93d4a1d65ba4a3f

jared@localhost$ shasum -a 256 rhel-server-6.1-x86_64-dvd.iso | grep -w 408b53542d967458c8a51ba0d4079956c853b30a029dea6df93d4a1d65ba4a3f