Lately I've been developing a certain fondness to the command line and want to learn

Nyblizzard

and gain more experience using it. Are there any certifications which I can validate my learning with? Thinking of checking out the Linux+ material.

xXErebuS

are you wanting to learn linux, or you just like the fact that you can do things with words? If the latter of the two I'd recommend automating processes using batch files; i.e. setting proxy settings based on IP or DHCP information for "fun".

Xyro

CLI? ... Cisco and/or Linux

I really like CLIs, hence my interest in the Cisco certs. Linux would be a good selection also though. Almost every good job I see requires it.

kurosaki00

I dont know how into CLI is Linux+
Maybe check redhat ($$$) or LPI certs?

for MS CLI, they have their own certs