bash script report errors on interfaces

Hi, I need assistance with my script, I am basically quering the system for all of the active interfaces and then I am searching for all different types of errors on collisions, dropped packets overruns, carrier, frame, if any other number than zero appers it will send me an email. So far this is what I have, but I am getting errors.

The joint 1 file looks like
eth0 errors:1 dropped:0 overruns:0 carrier:0
eth1 errors:0 dropped:0 overruns:0 carrier:0

Thank you for your assistance.

Mike

#!/bin/bash
 
LIMIT="0"
SUBJECT="Network error on $hostname"
ADMINS=myemail@gmail.com
 
#The interface will be displayed
ETH=$(ifconfig | awk '/(eth)/ { print $1 }' | cut -d':' -f2 | head -4 > /root/eth)
 
TX=$(ifconfig | grep "TX packets" > /root/tx)
 
paste /root/eth /root/tx > /root/joint
 
COMPARE=$(awk '{print $1, $4, $5, $6, $7}' /root/joint | grep -Ev "TX|0" > joint1)            
 
if [ $COMPARE -ge  $LIMIT]
   echo "Error on interface
fi

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