hmm, if you got the money yes... but if you rely your staff too much, once they leave you for some reasons you will be tied up... so a basic knowledge is still required. .

http://www.linuxlots.com/~jam/guide4.html

This site is not bad for learning basic commands have a look and tell me what you think

Here are few good resource;
http://www.linuxjournal.com/xstatic/community
http://www.linux.org/
One page Summary of linux useful command; (pdf) http://homepage.powerup.com.au/~squa...nux_manual.pdf

http://linux.about.com/od/commands/l/blcmd.htm

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Something useful is already posted here:

How To: Basic SSH Commands

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here are few:
ls - list files and directories
mv - move files
rm - delete files
cp - copy files
df - see disk space
free - see memory
cat - read file contents