Hi,

I'm new to shell scripting (ksh). I have a file called buildnumber.txt that has the value 1 inside it:

#cat buildnumber.txt
1

I need to write a shell script called "buildnumber" that takes the value from buildnumber.txt as a variable and increases the value in buildnumber.txt by 1.

Can anyone help?

Try this:

#!/bin/ksh

# declare NUM as type integer
typeset -i NUM

cat buildnumber.txt | read NUM
(( NUM = NUM+1 ))
echo $NUM

Thanks.

I removed the following line:

(( NUM = NUM+1 ))

as this only increased the value for NUM by 1 in the output. What I need to do is increase the value in buildnumber.txt by 1.

How can I do this?

Sorry, I misread your post. All you have to do is direct the output to buildnumber.txt. That is:

#!/bin/ksh

# declare NUM as type integer
typeset -i NUM

cat buildnumber.txt | read NUM
(( NUM = NUM+1 ))
echo $NUM > buildnumber.txt