Linux
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cbtnuggets Linux+ Series (w/2004 Update)
http://hotfile.com/list/113254/a24c7fb
VTC CompTIA Linux+ Certification Tutorials
http://hotfile.com/list/113207/d9251ac
cbtnuggets Intermediate to Advanced Linux Series
http://hotfile.com/list/112173/6b77d87
VTC Red Hat Certification Engineer
http://hotfile.com/list/112171/d39d66b
VTC Linux Professional Institute: Level 1 Tutorials
http://hotfile.com/list/112169/cde5cff
VTC Linux Professional Institute: Level 2 Tutorials
http://hotfile.com/list/112170/53ae5b3