Here docs with ssh

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October 19th, 2004, 08:39 AM

StevenC

PHP & Java Error Master

Join Date: Jun 2003

Location: My Computer

Posts: 1,218

Time spent in forums: 1 Day 1 h 31 m 24 sec
Reputation Power: 15

Here docs with ssh

I'm trying to write a little utility that'll connect to a number of boxes on my network, collect some system information, store them in local text files, then update a database with that information.

At the moment, I'm trying to work out the ssh issues.

It was recommended to me to use here docs to pass a lot of commands to the ssh command for remote execution.
Unfortunately, when using that it seems to execute the commands before the connection is established, as all the commands fail.

Here's my code:

Code:

while read linevar
do
        ssh -n cunnings@${linevar} hostname <<END_OF_SSH
        echo "Connected to $linevar!"

        ### Obtain system information ###

        node=$(uname -n | tr '[A-Z]' '[a-z]')
        os=$(uname)

        if test $os = AIX ; then
           osv=`oslevel`
           ip=$(ping -a -c1 $linevar | head -1 | awk '{print $3}' | tr -d ":")
           mem=$(lsattr -E -l mem0 | tail -1 | awk '{print $2}')
           cpus=$(lscfg | grep proc | wc -l | awk '{print $1}')
        fi
        if test $os = SunOS ; then
           osv=`uname -r`
           ip=$(ping -a -c1 dingo | head -1 | awk '{print $2}')
           mem=$(/usr/sbin/prtconf | grep 'Memory size' | awk '{print $3}')
           cpus=$(/usr/sbin/psrinfo | wc -l | awk '{print $1}')
        fi
        if test $os = Linux ; then
           osv=`uname -r`
           ip=$(ping -c1 $linevar | head -1 | awk '{print $3}' | tr -d ":")
           mem=$(grep MemTotal /proc/meminfo | tail -1 | awk '{print $2}')
           cpus=$(cat /proc/cpuinfo | grep ^processor| wc -l | awk '{print $1}')
           let "mem = $mem / 1024"
        fi

        if test -r ../data/node_details.txt ; then
                rm ../data/node_details.txt
        else
                touch ../data/node_details.txt
        fi

        echo "Node name   :  $node" >> node_details.txt
        echo "OS Name     :  $os" >> node_details.txt
        echo "OS Version  :  $osv" >> node_details.txt
        echo "IP Address  :  $ip" >> node_details.txt
        echo "Memory      :  $mem MB" >> node_details.txt
        echo "CPU Count   :  $cpus" >> node_details.txt

END_OF_SSH
done < node_list.txt

And here's the output (note: username is just a substitution for my own username):

Code:

/home/username/usc/scripts/usc_main: oslevel: command not found
ping: invalid option -- a
Usage: ping [-LRUbdfnqrvV] [-c count] [-i interval] [-w wait]
        [-p pattern] [-s packetsize] [-t ttl] [-I interface address]
        [ -T timestamp option ] [ -Q tos ] host
lsattr: invalid option -- E
Usage: lsattr [-RVadlv] [files...]
/home/username/usc/scripts/usc_main: lscfg: command not found
ping: invalid option -- a
Usage: ping [-LRUbdfnqrvV] [-c count] [-i interval] [-w wait]
        [-p pattern] [-s packetsize] [-t ttl] [-I interface address]
        [ -T timestamp option ] [ -Q tos ] host
/home/username/usc/scripts/usc_main: /usr/sbin/prtconf: No such file or directory
/home/username/usc/scripts/usc_main: /usr/sbin/psrinfo: No such file or directory
username@lightning2's password:
lightning2
/home/username/usc/scripts/usc_main: oslevel: command not found
ping: invalid option -- a
Usage: ping [-LRUbdfnqrvV] [-c count] [-i interval] [-w wait]
        [-p pattern] [-s packetsize] [-t ttl] [-I interface address]
        [ -T timestamp option ] [ -Q tos ] host
lsattr: invalid option -- E
Usage: lsattr [-RVadlv] [files...]
/home/username/usc/scripts/usc_main: lscfg: command not found
ping: invalid option -- a
Usage: ping [-LRUbdfnqrvV] [-c count] [-i interval] [-w wait]
        [-p pattern] [-s packetsize] [-t ttl] [-I interface address]
        [ -T timestamp option ] [ -Q tos ] host
/home/username/usc/scripts/usc_main: /usr/sbin/prtconf: No such file or directory
/home/username/usc/scripts/usc_main: /usr/sbin/psrinfo: No such file or directory
username@ranger's password:
ranger

The text file being read in contains 2 lines:
LIGHTNING2
RANGER

I'm running the script on RH, under the korn and/or bash.

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October 22nd, 2004, 09:18 AM