01-19-2012
The number of positional parameters which you can set depends on the Shell. In the original Bourne Shell it was 9 ($1-$9). I don't know of a low limit for any modern Bourne-type Shell (ksh, bash, Posix sh).
We'd need to know what Operating System you have in order to know what /usr/bin/sh means on your computer. Nowadays it's usually points to the Posix Shell in unix and to bash in Linux. However in say SUNOS it's the old Bourne Shell.
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