Which of the following commands makes /bin/foo executable by everyone but writable only by its owner？（）

Which of these commands allows you to use shared libraries that are in /usr/local/lib？（）

You have read/write permission on an ordinary file foo. You have just run In foo bar. What would happen if you ran rm foo？（）

Given the following output：  prompt> myapp  [1]+ Stopped myapp  prompt>  Which of the following commands will resume executing the stopped process while allowing the user to continue to type commands at the command prompt？（）

Many people like the vi text editor but the default bash command line editor recognizes emacs keystrokes. What command entered into a bash initialization file will have bash recognize vi keystrokes after login？（）

What command will print a list of usernames （first column） and their corresponding user id （uid， third column） from /etc/passwd？（）

Which command （without options） would you use to display how much space is available on all mounted partitions？（）

To allow a regular user account to mount and unmount a filesystem （for instance， a cdrom or floppy）， which option need to be added to the corresponding line in /etc/fstab？（）

What is the output when the following shell script executes？（）  cat<；<；foobar  Hello foobar  foobar

What is the difference between thE.remove and thE.purge action with the dpkg command？（）