Best practices for remote upgrade?

[Scott Harrison]

Hello,

	I have some 4.x servers that I would like to upgrade to 5.x, and  
perhaps 6.x.  However, I do not have any local access to these  
machines.  I can ssh into them only.  I would like to know whether it  
is possible for me to upgrade the machines with only ssh access, and  
what one should do to go about upgrading them.

        TIA,

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·𐑕𐑒𐑪𐑑 ·𐑣𐑺𐑦𐑕𐑩𐑯   Scott Harrison