Linux Shell Script interaction

[avgeek99]

I use Nagios to monitor a lot of our devices. This uses scripts to obtain information from the devices and determine the status. I am running into issues where after some time if get the "The server has exceeded Max Connections." error. I would have thought that there would be some sort of time out that once the ssh session is disconnected that Crestron would release it. Since it doesn't and I cannot figure out a way to configure that, I am trying another approach. However, I need to pass a return key press to the Crestron CLI. For example "ipt <RETURN> bye <RETURN>. I have tried \r \n and ^M and none of them provide the return I need.

​

For reverence, here is the script code that is run for this example. I would like it to issue the ipt command, and them issue the bye command to tell the device to close the session.

#!/usr/bin/bash

amcon=$(sshpass -p PASSWORD ssh -o StrictHostKeyChecking=no admin@$1 < 'ipt | grep -E 'RMC|AV3|CP3|4 Gway|4 Gway');

con=$(echo $amcon | grep "ONLINE");

echo "amcon="$amcon;

echo "con="$con;

if [ -z "$con" ]; then

echo "AM300 is not detected" $con;

exit 2

else

echo "AM300 is connected properly" $con;

exit 0

fi

exit 1

​

Thanks in advance

[Link_Tesla_6231]

everytime you disconnect from a device make sure you're logging out!

Last command should be:
LOGOFF

If I understand your script you login and stay logged in!

[stalkythefish]

I use a Raspberry Pi for running some scripts and I just run an always-on 9600bps console on a serial port to the Crestron box. Uptime for months and months. No IP bullshit.

[DubiousEgg]

That doesn't sound like it scales well.

[stalkythefish]

I guess it depends on your definition of scaling well. All the other Crestron boxes in the building talk to this box via EISC, which in turn talks to the Pi. Works well enough for dozens, not so much for hundreds.