bash save command before running

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Imagine you want to save a command to a variable (maybe so you can echo it out) before running it.

There's nothing special about saving it to a variable. However, when you go to run the saved command you may end up with a headache if you don't use eval.

If your command is simple it may work without eval, but more complex commands will start to do strange things.

Use eval!

CMD="curl -s"
echo "$CMD"
RESULT=$(eval $CMD)
echo "$RESULT"