why "unbound variable"

sunhui · 11-29-2006, 08:47 PM

In my system , one of user has a strange problem , when echo $PATH , it will show the searching PATH normally , but if I try to echo something which is not defined , for example , if echo $ufpoasufapfvsadf , then it show "unbound variable" , I also try another RH server but do not have the similiar problem , can advise what is wrong ? thx

matthewg42 · 11-29-2006, 09:50 PM

what shell are you using? You can tell by entering this command:

Code:

echo $SHELL

sunhui · 11-29-2006, 09:55 PM

Quote:

Originally Posted by matthewg42

what shell are you using? You can tell by entering this command:

Code:

echo $SHELL

thx reply ,

it is
/bin/bash

studioj · 11-29-2006, 09:56 PM

your bash options have

Code:

nounset         on

somewheree the shell has
set -u
or
set -o nounset
being called on it
i think
set +o nounset
should fix it as well if you can't find where it's being set
(in true unix fasion + takes the option away where - adds it -- go figure)
look at bash options with
set -o