How to Secure Linux server.
Thanks a lot for your response. Didn't read my typing before posting, My mistake. I'm redefining what i need. I'm in the process of creating secured environment. I need solution for following question.
1. Since this is going to be secured environment i want to know whether i can store all the commands executed by user can be captured, so any later investigation can be made on that.
But good (or evil) crackers know /var/log/message, of course, and will manipulate that once they have access.
2. My intention is instead of one password, i want user to enter two thing before getting into that machine. For example password and passphare. Two level of authentication.