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Environment Variables
All environment variables (
PATH, USER, HOSTNAME, ...)
are visible from within a shell script.
Use the command env to list them.
To make a VARIABLE accessible in a child shell use:
<![CDATA[
export VARIABLE="____"
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A shell can also be opend with modified
values for environment paramters:
<![CDATA[
USER=test my_script.sh
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With my_script.sh:
<![CDATA[
#!/bin/sh
echo user: $USER
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But changing a variable in a child shell
does not change its value in the parent shell!