How can I answer a question or post a comment when I first get on this site? [migrated]

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http://askubuntu.com – I'm a quite old user of linux in general and ubuntu in particular and find it quite frustrating not to be able to answer a question. Since I just register it appears that I only have one reputation point when I need 5 to answer a question. But well, how can I earn these points if I can't answer a question? Cheers Gildas (HowTos)