What does the immutable bit do to a file?
What are hard links?
What is an a record, an ns record, a ptr record, a cname record, an mx record?
What does ps do?
What is linux? How is it different from unix?
What does sar provide?
What is the ssl handshake?
How to connect to a remote server via ssh?
What is a typical size for a swap partition under a linux system?
What is the difference between soft and hard mounting points?
What is a zombie process?
State the difference between swap partition and a swap file?
What is ld_library_path?
What is the difference between an environment and a local variable?
What does ls -r do?