How do the environments of a standard Terminal command-line and a bash script differ?
- by fred.bear
I know there is something different about the environment of the Terminal command-line and the environment in a bash script, but I don't know what that difference is...
Here is the example which finally led me to ask this quesiton; it may flush out some of the differences.
I am trying to strip leading '0's from a number, with this command.
var="000123"; var="${var##+(0)}" ; echo $var
When I run this command from the Terminal's command-line, I get: 123
However, when I run it from within a script, it doesn't work; I get: 000123
I'm using Ubuntu 10.04, and tried all the following with the sam results:
GNOME Terminal 2.30.2
Konsole 2.4.5
#!/bin/bash
#!/bin/sh
What is causing this difference?
Even if some upgrade will make it work in scripts...
I am trying to find out the what and why,
so in future, I'll know what to look out for .
