script closing window
 

Hello! I'm new to this site, and trying to refresh my memory from 5 years ago since I last worked with Oracle and Unix. So please be patient with me! LOL

I have a shell script using sh that whenever I run it, it closes my Putty session! The script has only 2 lines, an echo statement and the first is the #!/bin/sh command....any help would be much appreciated! thanks!

Can you show a copy of the script?

script
 

I had even commented out the echo statement and it still closes the window? here's the exact contents of the script - I wrote using the VI editor so that there shouldn't be any problems with return characters...


#!/bin/sh
#echo "starting script";

also tried
 

I also tried using the printf function instead of echo, but that closes my putty session as well....

*How* are you running this script? Step by step, please.

That script does actually nothing because everything is commented out. At most, it should echo a message if you uncoment the 2nd line.

running script
 

I'm logging into putty, using the "cd" command I'm going to the directory where the script is stored, and then I'm typing in "exec <scriptname>"

I know the script isn't really doing anything, I'm just trying to get started on verifying that an easy script (like this one) will work so that I can figure out why another script is not working by adding in pieces/parts of the other script, but I don't want it to close putty all the time - don't want to keep logging back in - does that make sense?

another try
 

I have also just tried the below script, and it worked - displayed the #1, but as soon as I put the last line in ("echo script started;") it closes the window - tried it with and without the quotes around script started....

#!/bin/sh
export LeisaNbr=0;
let "LeisaNbr = LeisaNbr + 1";
echo $LeisaNbr;
echo script started;

That's what I wanted to hear. "exec" forks a new process, then terminates the current shell. When the script ends, there's nothing in putty, no shell, so it closes.

It's not the script, simply don't use exec. Either use:

or chmod it conveniently and run it this way:

You only have to chmod it once, of course. After that, you can run it that way.

Thank you!!!
 

that worked!!