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It's very difficult to answer that question. Especially because I don't know what you want to do. Do you wish to write code? If so, you'd need to have good programming logic, and be very comfortable with one language. If you wish to be an system/network administrator, you'd need to be comfortable running and troubleshooting servers (web, mail, ftp, etc). You don't necessarily need to know any programming language to get a Linux job, although a little programming skill might help you do your job better, you know :)

http://jobs.linux.com/
http://www.hotlinuxjobs.com/
http://www.linuxquestions.org/questions/lq-job-marketplace-72/

Cheers!

Coauthor of Beginning Fedora: From Novice to Professional published by Apress.

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Just like Shashank said it all depends on what you want to do.
If you want to be a Systems Administrator you would have to be good a troubleshooting...
As for a scripting language which I feel every Sysadmin should know at least one, I would say Python or Perl or BOTH :).

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