vmanage:~/web$ openssl genrsa -out rootca.key 2048
Generating RSA private key, 2048 bit long modulus
e is 65537 (0x10001)
vmanage:~/web$ openssl req -x509 -new -nodes -key rootca.key -sha256 -days 4000 -out rootca.pem
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]:US
State or Province Name (full name) [Some-State]:CA
Locality Name (eg, city) :San Jose
Organization Name (eg, company) [Internet Widgits Pty Ltd]:Cisco Systems
Organizational Unit Name (eg, section) :Cisco SDWAN
Common Name (e.g. server FQDN or YOUR name) :vmanage
Email Address :
rootca.key rootca.pem web_cert.csr