Not pure perl

monk2b has asked for the wisdom of the Perl Monks concerning the following question:

I have a script that I wrote to get infomation about all of the linux boxes on my network. The script works ,but it is not pure perl and I can't figure out how to make it pure.Any help would be greatly appreciated

 
#!/usr/local/bin/perl    -w
use strict

$file2 = "/tmp/boxinfo";
open(FILE2, ">$file2");
$file = "/export/monk2b/doc/testboxes";
open(FILE, "$file");
while(<FILE>)
{
my($line) = $_;
chomp($line);
$var1 = `rsh $line cat /proc/cpuinfo | grep "cpu MHz"` ; 
@par1 = split(/\s+/, $var1); 
$var2 = `rsh $line free | grep Mem` ;  
@par2 = split(/\s+/, $var2);
$var3 = `rsh $line cat /etc/issue | grep Kernel` ;  
@par3 = split(/\s+/, $var3);
print FILE2 "$line\t$par1[3]\t$par2[1]\t$par3[1]\n";
}
close(FILE)
close(FILE2)
[download]

Thanks monk2b learning slowly

Comment on Not pure perl Download Code

Replies are listed 'Best First'.
Re: Not pure perl by btrott (Parson) on Apr 30, 2001 at 22:23 UTC
As an alternative to rsh, if you have ssh set up you might try using Net::SSH::Perl to connect to each of the hosts and execute the commands. (Yes, I'm biased. :)	[reply]
Re: Not pure perl by DrZaius (Monk) on Apr 30, 2001 at 22:14 UTC
Instead of copying your code around, why not write a shell script that looks like this: for box in `cat /tmp/testboxes` do ssh $box 'your perl code here -- not the script file name' \ > /tmp/$box.data done [download] This will execute the code on the remote server and dump the output to a file. Requires ssh keys and maybe ssh-agent.Now you can just do file opens on /proc files to get the data. Oh, if you want to really be pure perl, you could use Net::SSH::Perl (as another biased poster suggested) -- it may actually be cleaner because you could use a __DATA__ block for your remote perl code. Out.	[reply] [d/l]
Re: Not pure perl by BigRed (Acolyte) on Apr 30, 2001 at 21:53 UTC
If it's okay to use telnet protocol instead of rsh, you can try Net::Telnet. I've used it to good effect before.	[reply]
Re: Not pure perl by isotope (Deacon) on Apr 30, 2001 at 21:51 UTC
I'm looking through modules, but for now, at least for the kernel version, you might save some work using `uname -r` Update 1: You might look into Unix::Processors. Of course, if you start doing this you'll have to copy scripts around, or pipe them to the remote Perl... --isotope http://www.skylab.org/~isotope/	[reply]