These questions are referring to Linux.

1. [5pts] What command will show you which groups you are a member of? 2. [5pts] What does the variable $?" show? 3. [5pts] What command will find all files with suffix '.txt' in the subtree /foo/bar? 4. [5pts] With what command (and arguments) can you find out your kernel version and the nodename"? [The output should not include any other information] 5. [5pts] What is the difference between the paths"...", and "~"? What does the path "/refer to when not preceded by anything? 6. [5pts] Which command would you use to find the pid" for a running process? 7. [10pts] Write a single command that will return every username in the system in alphabetical order. [You may chain commands using piping and redirects] 8. [10pts] What is the difference between sudo and su root? 9. [10pts] How would you make a program or script execute on a schedule or set interval? E.g. Run this program once every 30 minutes or every day at midnight