[root@e2fsck ~]# openssl genrsa -des3 -out e2fsck.org.key 2048
Generating RSA private key, 1024 bit long modulus
………..++++++
………..++++++
e is 65537 (0×10001)
Enter pass phrase for e2fsck.org.key: 输入密码
Verifying – Enter pass phrase for e2fsck.org.key: 输入密码

[root@e2fsck ~]# openssl req -new -key e2fsck.org.key -out e2fsck.org.csr
Enter pass phrase for e2fsck.org.key: 输入密码
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]:CN
State or Province Name (full name) []:JS
Locality Name (eg, city) [Default City]:SZ
Organization Name (eg, company) [Default Company Ltd]:e2fsck
Organizational Unit Name (eg, section) []:e2fsck.org
Common Name (eg, your name or your server's hostname) []:*.e2fsck.org
Email Address []:root@e2fsck.org

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

[root@e2fsck ~]# openssl rsa -in e2fsck.org.key -out e2fsck.org_nopass.key
Enter pass phrase for e2fsck.org.key: 输入上面的密码
writing RSA key

[root@e2fsck ~]# ls

e2fsck.org.csr e2fsck.org.key e2fsck.org_nopass.key

[root@e2fsck ~]# cd /usr/local/nginx/conf/   #我这里把证书都放在了这个目录

[root@e2fsck conf]# wget http://cert.startssl.com/certs/ca.pem

[root@e2fsck conf]# wget http://cert.startssl.com/certs/sub.class1.server.ca.pem

[root@e2fsck conf]# cp e2fsck.org.crt e2fsck.org.bak   #先备份下

[root@e2fsck conf]# cat ca.pem sub.class1.server.ca.pem  e2fsck.org.crt

—–END CERTIFICATE———-BEGIN CERTIFICATE—–

—–END CERTIFICATE—–
—–BEGIN CERTIFICATE—–