A SECRET WEAPON FOR SHELL 1

When not doing substring enlargement, utilizing the forms documented beneath, bash checks for your parameter that's unset or null. Omitting the colon ends in a check just for a parameter that is definitely unset. ” Of course, that’s exactly the stage. “how does /at turn into a "c" in echo $ animal/at/ow ?” Huh? /at doesn’t grow to be "c"