[SOLVED] ISO Simple, dependable way to monitor ISP's down time

Ml9xLi6kvpVZ09r · 02-04-2022, 02:06 PM

With this winter weather my ISP service can go to crap some days. I'm a very amateur BASH script butcherer and I decided to put something together to record my connection down-time. Here's what I've got so far. It seems to work OK. So far today my WIFI has dropped for a brief second or so three times. I tossed the script onto my wife's PC and I'll check it later to see how it does on her's. I'm on an ASUS laptop with WIFI only and my wife is on an All-In_One on just ethernet.
Anyone see any problems with this or ways to do it better or to make this work better?

Code:

while [ 1 ]
do
wget -q --spider 'https://www.google.com/'
status=$?
# 0 is UP, 4 is DOWN
[ $status -eq 4 ] && TIME_NOW=`date -R` && echo "   DOWN    $TIME_NOW"  >> ""${HOME}"/Bash_Scripts/IP-Up-Down_Time.log"
sleep 5
done;

michaelk · 02-04-2022, 07:03 PM

I would just use fping or ping to check connectivity versus wget but the result is the same.

Ml9xLi6kvpVZ09r · 02-04-2022, 10:14 PM

Quote:

Originally Posted by michaelk

I would just use fping or ping to check connectivity versus wget but the result is the same.

Thank you, I'll take a look at ping.

teckk · 02-05-2022, 08:30 AM

Code:

while :; do
    ping -c1 8.8.8.8
    if [ "$?" == 0 ]; then
        echo "Good"
    else echo -e "Down at:\n$(date -R)\n" >> file.log
    fi
    sleep 60
done

You could test that with 8.8.8.9

I would not ping google every 5 seconds.

uteck · 02-05-2022, 08:49 AM

I used a tool to log outages and do a traceroute, but I forgot the name. Did some googling and found MTR which looks closes to what I was using. https://en.wikipedia.org/wiki/MTR_%28software%29

edit: looks like it is in Debian repos, so "apt install mtr"