Shell Programming and Scripting

Hi guys,

I need to upgrade perl modules on about multiple machines. I'm writing a for loop for it.

Code:

for i in 1 2 3 4 5 6; 
do 
   ssh server$i " sudo cpan Mozilla::CA, 
   sudo cpan LWP::UserAgent, 
   sudo cpan LWP::Protocol::https, 
   sudo cpan IO::Socket::SSL, 
   sudo cpan Net::SSL, 
   sudo cpan Net::SSLeay, 
   sudo cpan Net::FTPSSL"; 
done

I haven't tested it but I think that should work for most of the modules. The problem is a couple of the modules ask for user input. Now I'm not going to be doing anything fancy. I would just select no and press enter. Can anyone give me a clue how to add that to my loop/script. There must be a quick and easy way to do that. lol.

First thing: there appears to be a logical error in your for-loop. The following code would do <whatever> 6 times. In your case, it would run all of the ssh and cpan commands 6 times. I don't think that's what you want.

Code:

for i in 1 2 3 4 5 6
do
    <whatever>
done

Also, read about PERL_MM_USE_DEFAULT environment variable and cpanminus.

I've fixed my code. So it shouldn't run all the ssh and cpan commands six times.