Welcome to LinuxQuestions
This web site is intended as a help resource for any Linux/Unix user that has problems or questions, regardless or their level of knowledge.
That makes for a lot
of questions from a lot
More over, this site lives through its users, in that answers come from them too. But not all people have the same areas of expertise (or at least knowledge), and for one person to read through thousands of questions a day and deciding on a few words if each question matches their knowledge would be a daunting task!
Finally, this web site acts as an archive of many questions and many answers, in which people are expected to do searches before they ask a question; this question is then expected to be different from all previous questions.
To make things easier for those who may have the answers to others' questions, and to make things easier for those who look for existing answers that may solve their issue, the web site is split in different forums.
A forum is assigned a theme, and in there you can ask questions related to this theme. Examples of forums: Software, Hardware, Security, Networking...
When you click on a forum, you're presented with the list of all already asked questions in this forum, going from the newest to the oldest, each of which can be clicked on, to read the full text and answers that might already exist to this question.
A question is refered-to as a "post". An answer is also refered-to as a "post".
A question and all its answers are refered-to as a "topic" or "thread".
I hope this helps.