Is there any way to undo a terminal command?
Not quite sure what you mean by "inserted a few terminal commands". Do you mean that they some how run on a regular basis by themselves. Or, that you accessed the Terminal by going into your "App...
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How to use the wc command in terminal?
for something like that I'd use grep and pipe the result through wc as ingrep xxx file | wc -wYou do what you suggest and it should say wc: xxx: No such file or directory
How would I make a "Exist" Variable or Command Line in Terminal?
Don't know too much about Automator, but to do it with shellif [ -f fileName ]; thendostufffi
What does the drill command execute on the third command mean if it is even a real command?
You have to register for the Selective Service Act.