さくらの格安SSL証明書発行とCentosインストール手順

$ openssl genrsa -aes256 2048 >server.key

[centos@i-vhost work]$ openssl genrsa -aes256 2048 >server.key
Generating RSA private key, 2048 bit long modulus
.............+++
..............................................................................................+++
e is 65537 (0x10001)
Enter pass phrase:パスワードを入力
Verifying - Enter pass phrase:パスワードを入力
[centos@i-vhost work]$ 

$ openssl req -new -key server.key -out server.csr -sha256

[centos@i-vhost work]$ openssl req -new -key server.key -out server.csr -sha256
Enter pass phrase for server.key:パスワードを入力
You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,
If you enter '.', the field will be left blank.
-----
Country Name (2 letter code) [XX]:国名 ※例：JP
State or Province Name (full name) []:都道府県 ※例：Tokyo
Locality Name (eg, city) [Default City]:市区町村 ※例：Chiyoda-ku
Organization Name (eg, company) [Default Company Ltd]: 組織名 ※例：Japan Reg Co., Ltd.
Organizational Unit Name (eg, section) []: 部署名　※省略可
Common Name (eg, your name or your server's hostname) []:サーバー名 ※enjoy.com
Email Address []:空白 ※指定なし

Please enter the following 'extra' attributes
to be sent with your certificate request
A challenge password []:空白 ※指定なし
An optional company name []:空白 ※指定なし
[centos@i-vhost work]$ ls
server.csr  server.key ※csrが造られる。
[centos@i-vhost work]$ 
[centos@i-vhost work]$ cat server.csr 
-----BEGIN CERTIFICATE REQUEST-----
↑から
↓までコピーする
-----END CERTIFICATE REQUEST-----