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How to set value to variable in UNIX

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# 1  
Old 07-14-2009
How to set value to variable in UNIX
Hi,

I am new to UNIX. I wonder how to set value to variable in UNIX..

my code:
if [ -f /home/batch/sample.txt ]; then EXIST=$a ; else EXIST=$b ; fi'
echo $EXIST

the value of EXIST is empty...

Thanks Smilie
# 2  
Old 07-14-2009
Initially assign some values to variable "a" and "b" as
a=10 <sample_data>
b=11 <sample_data> Then check
# 3  
Old 07-14-2009
Is $a and/or $b defined ?
# 4  
Old 07-14-2009
if I use this code, it works fine.
Code:
ssh batch@192.168.3.222 'if [ -f /home/batch/sample.txt ]; then echo "exist" ; else echo "not exist" ; fi'

it will print out "Exist"



But if I use this code, it display "0".
Code:
a=0
ssh batch@192.168.3.222 'if [ -f /home/batch/sample.txt ]; then a=1 ; else a=2 ; fi'
echo $a

It seems that the value is not assigned to the variable inside the if-else statement.
# 5  
Old 07-14-2009
yes, because you ran it to a different machine
Code:
a=`ssh batch@192.168.3.222 'if [ -f /home/batch/sample.txt ]; then echo 1 ; else echo 2 ; fi'`
echo $a

# 6  
Old 07-14-2009
Quote:
Originally Posted by ryandegreat25
yes, because you ran it to a different machine
Code:
a=`ssh batch@192.168.3.222 'if [ -f /home/batch/sample.txt ]; then echo 1 ; else echo 2 ; fi'`
echo $a

Hi ryandegreat25,
Thanks.. it works now... Smilie
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