check_errors.sh

#!/bin/bash

ETHTOOL=/sbin/ethtool
NETWORK_INTERFACE=eth0

ERROR_STATS=$($ETHTOOL -S $NETWORK_INTERFACE | grep errors | tr -d " ")

for STAT in $ERROR_STATS
do
    KEY=$(echo $STAT | awk -F ':' '{print $1}')
    VALUE=$(echo $STAT | awk -F ':' '{print $2}')
    if [[ $VALUE != 0 ]]
    then
        echo "$KEY has non-zero value of $VALUE."
        exit 1
    else
        echo "$KEY has value $VALUE."
    fi
done