Attention: this is the key used to sign the certificate requests, anyone holding this can sign certificates on your behalf. So keep it in a safe place!
openssl genrsa -des3 -out rootCA.key 4096
As an open source object-relational database management system, PostgreSQL available for MacOS, Linux, and Windows.
The goal will be to run the following command successfully from the command line (regardless of the OS):
psql -U postgres
This should open the psql interactive shell and print a prompt that looks like: