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Basic grep
me@box:~$ cat knight
A novice was trying to fix a broken Lisp machine by turning the power off and on.
Knight, seeing what the student was doing, spoke sternly: “You cannot fix a machine by just power-cycling it with no understanding of what is going wrong.”
Knight turned the machine off and on.
The machine worked.
me@box:~$ cat knight | grep Lisp
A novice was trying to fix a broken Lisp machine by