The members here at LinuxQuestions are happy to answer questions about your usage and understanding of Linux and all kinds of Linux-related areas, but the forum rules
explicitly bar posters from soliciting answers to homework problems. The proper moderator has been notified.
In the future, you may want to start homework assignments well in advance so that you have ample time to research the answers. If, for example, you have difficulty configuring or understanding OpenSSH, LQ members will be happy to assist with your relevant and well formulated questions. You should not, however, ask questions until you've actually done your own research (Google is a great tool) and actually attempted configuration on your own.
Ultimately, this policy benefits everyone. It benefits you, because you learn far more about Linux (or any subject) by trying to figure things out for yourself. It benefits the members who actively answer questions, because they don't have the answer the same basic questions over and over, and it benefits the community by keeping the over all discussions interesting and fresh, rather than a daily repeat of the same questions and answers.
Oh, and by the way selling your products or services on LQ is also forbidden by the forum rules. Follow the appropriate contact if you wish to purchase advertising space.