Why my command of bash shell is not working?

Question

I add environment value in ~/.profile

export TEST1="abc"

I execute bash shell script go.sh

#!/bin/bash
source ~/.profile

but result of go.sh is not working.(can't find TEST1 variable).

set | grep TEST1

Otherwise when I execute go.sh in command line, it working. (can find TEST1) Why go.sh is not working?

Answer 1

When you execute your script, a new process is created with its own environment. When you get the prompt back, that script is finished, and you cannot access its variables.

You have to source your script:

source go.sh

If all you want is a shortcut for reading the profile, use an alias:

alias go='source ~/.profile'

Answer 2

A script cannot affect the environment of its parent shell.

You can see the changes if you include the test in the script:

#!/bin/bash
source ~/.profile
set | grep TEST1

Or when you perform the source ... in your current shell

$ source ~/.profile
$ set | grep TEST1

Answer 3

the command

set|grep TEST 

should works even without $

If you're using bash, try to put your variable in .bashrc

in any case if you try to set the variable via command line it should works too.

bash-3.2$ export TEST1="abc"  
bash-3.2$ set | grep TEST1 
TEST1=abc
_=TEST1 
bash-3.2$ set | grep $TEST1 
TEST1=abc 
bash-3.2$ echo $TEST1 
abc 
bash-3.2$