$ openssl genrsa -des3 -out server.key 1024
Generating RSA private key, 1024 bit long modulus
....................................++++++
..++++++
e is 65537 (0x10001)
Enter pass phrase for server.key:
Verifying - Enter pass phrase for server.key:

$ openssl req -new -key server.key -out server.csr
Enter pass phrase for server.key:
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) [AU]:TH
State or Province Name (full name) [Some-State]:Songkhla
Locality Name (eg, city) []:Muang
Organization Name (eg, company) [Internet Widgits Pty Ltd]:xData Company
Organizational Unit Name (eg, section) []:Information Tenchnology
Common Name (e.g. server FQDN or YOUR name) []:xdata.com
Email Address []:authapon@gmail.com

Please enter the following 'extra' attributes
to be sent with your certificate request
A challenge password []:strong
An optional company name []:xData

$ cp server.key server.key.org
$ openssl rsa -in server.key.org -out server.key
Enter pass phrase for server.key.org:
writing RSA key

$ openssl x509 -req -days 365 -in server.csr -signkey server.key -out server.crt
Signature ok
subject=/C=TH/ST=Songkhla/L=Muang/O=xData Company/OU=Information Tenchnology/CN=xdata.com/emailAddress=authapon@gmail.com
Getting Private key

$ cat server.csr server.key > server.pem