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Fixed random spelling error.
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@ -50,7 +50,7 @@ echo ${VARIABLE/Some/A}
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echo ${FOO:-"DefaultValueIfFOOIsMissingOrEmpty"}
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# This works for null (FOO=), empty string (FOO=""), zero (FOO=0) returns 0
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# Bultin variables:
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# Builtin variables:
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# There are some useful builtin variables, like
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echo "Last program return value: $?"
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echo "Script's PID: $$"
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