What file system should i use for Linux?

I've planned to change my current OS (Windows 7) to Linux Mint 9 Isadora or Ubuntu Desktop edition 32 bit but, i am confused of what file system does Linux use, and which 1 is the most trusted and at the same time software friendly. Please tell me what file system should I used and which among the 2 Linux... show more I've planned to change my current OS (Windows 7) to Linux Mint 9 Isadora or Ubuntu Desktop edition 32 bit but, i am confused of what file system does Linux use, and which 1 is the most trusted and at the same time software friendly. Please tell me what file system should I used and which among the 2 Linux version is better?
I am also interested in joining in any Linux group/clan/guild/ect....
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