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- ctrl-C will interrupt the current running program, and get you back to the shell
- ctrl-D sends EOF
-IO Redirection
- <cmd> < <filename> operator redirects stdin from the command line to file
- <cmd> > <filename> operator redirects stdout from the command line to file
- <cmd1> | <cmd2> 'pipe' operator redirects output of cmd1 as input to cmd2
- the operators can be combined