[root@freebsd openssl]# cd /etc/ssl
[root@freebsd ssl]# openssl genrsa -des3 -out server.key 2048
Generating RSA private key, 2048 bit long modulus
...+++
........................................................+++
e is 65537 (0x10001)
Enter pass phrase for server.key: ←パスフレーズ入力
Verifying - Enter pass phrase for server.key: ←パスフレーズ再入力