ssh+commands in shell script

[lecont]

Hi, I'm trying to write a script that ssh's to another server and does some commands.

I have problems with this:

LIST=´ls -l /DIR | grep -v gz | wc -l`

ssh user(at)server <<EOT
echo $LIST
if [ $LIST -gt 1 ]
then
echo " One or more files are not gzipped "
else
echo " It's fine "
fi
EOT

I then run the script on the local server and outputs it to a .txt file.

But the output is 0 everytime, even if there are files that's not gzipped in that directory.

What am I missing?

[three18ti]

Is there a reason you chose to use Bash to do this?

Perl offers some very easy to implement modules that will make you life much easier, and make maintenance easier.

Specifically:
Net::SSH::Perl
Net::SSH


Here is an example I wrote a while ago:

#!/usr/bin/perl
use strict;
use warnings;
use Net::SSH::Perl;

my $host = "192.168.1.150";
my $user = 'root';
my $pass = 'password';

my $ssh = Net::SSH::Perl->new($host);
$ssh->login($user, $pass);
my ($stdout, $stderr, $exit) = $ssh->cmd("ls -l");
print "$stdout, $stderr, $exit \n";

($stdout, $stderr, $exit) = $ssh->cmd("find -name 'somefile'");

This is a basic example, but you could easily extend this for multiple hosts.

Past that, I really need a better idea of what it is you are attempting to do.

[atreyu]

I agree w/three18ti - there are more sophisticated ways to do this.

But looking at your example, I would modify it like so in order to get it work like you want (I think) - but most important is that you have to escape the variable holding your count value:

#!/bin/bash
#LIST='ls -l /tmp/DIR | grep -v gz|wc -l'
ssh user(at)server <<EOT
cnt=$(find /DIR -type f -not -iname '*.gz'|wc -l)
echo \$cnt
if [ \$cnt -gt 1 ]; then
 echo " One or more files are not gzipped "
else
 echo " It's fine "
fi
EOT

[stokes]

Hi, your script doesn't work because you defined your LIST variable locally. When you ssh'd to the remote server, you were in a new shell and $LIST didn't exist. Also rather than using ssh name@server <<EOT, I would use semicolons for line breaks. Something like:

ssh user@server 'if [ "$(ls -l /DIR | grep -v gz | wc -l)" -gt 1 ]; then echo " One or more files are not gzipped "; else echo "its fine";fi'

btw, I didn't test that. Might put you on the right lines though.

[lecont]

Thanks for the input, learned something atleast.
I did it the "lazy" way and made a script on the remote server with the commands and called that script from a script on the local server.

[salva]

And ...

+ Net::OpenSSH
+ Net::SSH2