On Fri, 4 Jan 2002, Paul Rimmer wrote:
[...]
> #Test Line follows
> PATH=/usr/local/sbin:/usr/local/bin:/sbin:/usr/sbin:/usr/bin
>
> main () {
>
> prog=`basename $0`
> <SNIP>
>
> The mailing no longer occurs. Remove it and I get the emails again but with
> no $HOSTNAME. Just so I know, what is the relationship between PATH and
> environment variables? How does adding the above path provide visibility to
> $HOSTNAME?
By providing visibility to programs, including the "hostname" command.
If the PATH string doesn't point to the location of the program (like
/bin), then constructs like $(hostname) and `hostname` won't work... they
will spit out errors to stderr and output nothing to stdout... leaving an
empty string as a result.
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