On Mon, October 8, 2007 2:39 pm, Steven W. Orr said:

>
> The history is that before [ was a builtin, it used to be an external
> program. You could look on old unix boxen and there'd be a file called
> test which had a hard link to a file called [. The ] at the end of the [
> was just syntactic sugar. There's no difference between
>

Ah, that brings back memories. Back in 1983, when I was fairly new to
Unix and had only recently been given root access at my college lab,
I noticed that /bin was world writable, After correcting that, I looked
in /bin for suspicious files, and that was the first time I ever noticed
the file [ . It looked suspicious, so of course I deleted it.  :-/


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