# openssl genrsa -out n.sfs.tw.key 2048
Generating RSA private key, 2048 bit long modulus
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e is 65537 (0x10001)
# openssl req -utf8 -sha256 -new -key n.sfs.tw.key -out n.sfs.tw.csr
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.
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Country Name (2 letter code) [XX]:TW
State or Province Name (full name) []:Taiwan
Locality Name (eg, city) [Default City]:Taichung
Organization Name (eg, company) [Default Company Ltd]:n.sfs.tw
Organizational Unit Name (eg, section) []:section
Common Name (eg, your name or your server's hostname) []:n.sfs.tw
Email Address []:yourname@example.com

Please enter the following 'extra' attributes
to be sent with your certificate request
A challenge password []:<留空不要填>
An optional company name []: