I've come across Red Hat allot lately and am wondering if I need to get studying. I'm an avid Ubuntu server user but don't want to get stuck only knowing one distro.
What is the way to go if i want to know as much as I can for use in real world situations.
It really depends. I work for a large company and we use Ubuntu, Oracle, RedHat, and SLES. We were moving from Oracle to Ubuntu but now we are going back to RedHat.
Currently we deploy like this:
Ubuntu: PostgreSQL, web servers, some engineering workstations, and big data
Oracle & RedHat: web servers, security applications, and network systems
So just having a fundamental understanding of Linux and you will be fine
SUSE: SAP and HR software