0. What are the main differences between Apache 1.x and 2.x?
1. What does the “route” command do?
2. What are the read/write/execute bits on a directory mean?
3. What does iostat do?
4. what does vmstat do?
5. What does netstat do?
6. What is the most graceful way to bring a system into single user mode?
7. How do you determine disk usage?
8. What is AWK?
9. What is SED?
10. What is the difference between binaries in /bin, and /usr/bin?
11. What is a dynamically linked file?
12. What is a statically linked file?