Revoke a certificate

openssl ca -config mid-ca/mid-ca.crt -revoke server/certs/server.crt
cat mid-ca/index

See also:

OpenSSL - Initial Setup

OpenSSL (1) - Root CA

OpenSSL (2) - Intermediate CA

OpenSSL (3) - Server Certificate

OpenSSL (4) - Client Certificate

OpenSSL - Verify Certificate

OpenSSL - Revoke Certificate