I am unable so far to configurt Evolution to receive mail. And what about disk defrag or system restore with Linux?
You should configure it as any other email client - you must follow instructions for your specific mail provider. What do you mean by system restore? If you use ext3 (Ubuntu default) as filesystem then you can't defragment it.
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Disk defragmentation is not required with Ubuntu ext3 file system. Every once in a while, when you start your system, it automatically do a routine disk check, which only takes a couple minutes, so I would recommend that you let it run.
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