John Mort wrote:
Can anyone recommend a tool to track network uptime? Some work was
done on one of my building's network connection and users are
reporting that there are intermittent outages. I'd like some way of
pinging a location once a second or minute or so and tracking that
over a long period of time like a few days or a week to see if there
are any patterns to the outages and how long/often they are occurring.
My simple-minded solution evolved into the following bash script. I
start it manually as an ordinary user with "nice -19 scriptname &". It
only logs anything if 'ping' has returned nonzero. When it does log
anything, it also logs a couple of other things that may or not be
related. Modify it however you want, especially the "sleep 15s" at the
end. If you come up with any improvements, would you be able to post
them here? Be sure to make LOGFILE writable by the user running the script.
#!/bin/bash
LOGFILE=/mnt/vm/$(basename $0).log
TEMPFILE=~/tmp/$(basename $0).tmp
while true ; do
/bin/ping -c 2 -w 8 206.46.230.44 > "$TEMPFILE"
RC=$?
if [ $RC -ne 0 ] ; then
date >> "$LOGFILE"
cat "$TEMPFILE" >> "$LOGFILE"
echo >> "$LOGFILE"
echo \"ping\" return code: $RC >> "$LOGFILE"
/sbin/arp -a >> "$LOGFILE"
echo "router reports:" $(wget -qO -
http://dslrouter/indexHiddenVZ.htm | grep -E
'ipaddress.*[[:digit:]].*;') >> "$LOGFILE"
echo "icanhazip.com reports IP = $(wget -qO -
icanhazip.com)" >> "$LOGFILE"
# latest time, in case preceding two lines took a while to time out
date >> "$LOGFILE"
echo '========================================' >>
"$LOGFILE"
fi
sleep 15s
done
I also have a similar script that does a 'traceroute' once a minute but
only logs it if the output contains a bang or a splat. I also have two
tasks in cron.hourly -- one gets the latest system log from my router
and appends it to a file, the other uses 'wget' to grab a file from my
own website and record the download speed.
Adam
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