4 ms·

Every command is in a new subshell

• contras1970 10y ago
  That may be true but the message from grep shows that $! wasn't expanded by the execution evironment. BTW i get # Print "hello world". # Hint: There are many ways to print text on # the command line, one way is with the 'echo' # command. # # Try it below and good luck! # bash(0)> printf "hello world" Internal Server Error bash(️)>
  • groner 10y ago
    history expansion is normally only enabled for interactive shells. They could turn it on, but if there isn't any history because this isn't really interactive, it wouldn't do anything useful.