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The $(COMMAND) form has superseded backticks for command substitution. 

Only the $(command) is documented in the O'Reilly bash 2nd Ed.  Not so good 
when man pages still use the backtick method.

THanks for the referral.

On Thursday 14 February 2002 02:32 pm, you wrote:
> "M. Mueller (bhu5nji)" wrote:
> > why does the following command work:
> >
> > $kill -SIGHUP `cat /var/run/syslogd.pid`
> >
> > why does the following command *not* work:
> >
> > $kill -SIGHUP 'cat /var/run/syslogd.pid'
> >
> > Mike M.
> >
> > _______________________________________________
> > TriLUG mailing list
> > http://www.trilug.org/mailman/listinfo/trilug
>
> Check out the Advanced Bash-Scripting Guide
> http://www.linuxdoc.org/LDP/abs/html/
>
> I've found it to be very helpful
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