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It depends. First question is - what 3 courses?
If you have a strong level of Unix experience, you may be able to use the courses to understand how Linux varies from Unix. When I took RH300, most of the people who did not pass had years of Unix experience but little on Linux.
There are things unique to Linux, such as diagnosing the bootloader, where Unix gurus have little experience. And there are subtle things. Command syntaxes seem to differ in ways annoying to Unix gurus.
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