Shell Programming and Scripting

Hi,
I'm new to shell programming.

I have two variables a and b
a=val1
b=val2

could anyone kindly post the shell script to concatenate the values of variable a and b with an underscore(_) in between?
The final output should be val1_val2.

c="${a}_${b}"
echo "${c}"

Code:

$ c="${a}_${b}"
$ echo $c
val1_val2

There is some discripency in the result that I am getting in the below shell script.
I have a configuration file having data as
fileTest.conf:
----------------
file=abc
value=123

The Shell Script is:
------------------
ram=`grep 'file=' fileTest.conf | awk -F"=" '{print $2}'`
shyam=`grep 'value=' fileTest.conf | awk -F"=" '{print $2}'`
echo $ram
echo $shyam
c="${ram}_${shyam}"
echo "$c"
Output:
-------
abc
123
_123

The output I want is
abc
123
abc_123
Could someone please let me know what the problem is in the script and how should be the correct script look like?

There is nothing wrong with your script if you are using either ksh or bash.
What shell are you using?

i'm using bash

Code:

You have a "\n" in $ram and problem will be solved if you modify the first awk to be like below

awk -F"=" '{printf"%s",$2}'`