Is SSH tool of choice? Which flavor?

Is SSH the tool of choice for remote command line administration? If so - which flavor do you prefer for a Linux box (I've heard of several - OpenSSH, VNC, Penguinet, etc.)?
If not SSH - what is tool of choice?

Forgive me if I'm asking a dumb question or asking the question incorrectly - I'm still learning how to crawl in this world.

 

 

 

 

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