A user reports a problem. In order to gain access to his account in the most secure and non obtrusive way, you...

You inspect the last access time (atime) instead of the last modification time (mtime) in ls output by using the following switch to ls:

In Unix, a filename cannot have the following character:

If FFF is a file, the command 'touch FFF' will:

Which of the following is not contained in the inode structure?

Which of the following would you use to set yourself as the superuser in a secure way?

Which command will you use to see your current group?

Which of the following characters can be used to run multiple commands on a single line?

Which of the following is incorrect about the restrictions imposed by the restricted shell ?

With regard to UNIX, a process is :

What is the file descriptor for the standard error file ?