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I think this section is misleading. "It is also used as a no-op dummy command for side-effects such as assigning default values to shell variables through the $ {parameter:=word} parameter expansion form.". Looking at the reference, there's nothing about $ {parameter:=word} and whilst that does set
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Just possibly that in SCO (and probably other SYSV variants that /bin/true is (was) actually a 0 length file. With no "magic" in the header, the shell presumed it a script. Immediately hitting EOF and having executed no failing instructions, the shell returned "success" which is 0 which is "true."
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the value of the variable if it's empty, I don't believe this colon has anything to do with the null command (except that it's also a colon).
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All successful program executions are alike, but each of up to 255 failed program executions may fail in their own fashion
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on
Knowledge. If you would like to participate, please visit the project page, where you can join
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are two different commands with different meaning. Article should be splitted. --
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true(unix) and false(unix) should be merged, since they make antagon things. --
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You are an idiot. They are two different UNIX comands. --
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Why not same classical logic has 1=true and 0=false
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