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Full Discussion: Log of lost internet connections
Top Forums Shell Programming and Scripting Log of lost internet connections Post 303028686 by bakunin on Saturday 12th of January 2019 05:18:40 PM
Old 01-12-2019
Quote:
Originally Posted by drew77
I would like for it to only log pings that generate 100% packet loss. Thanks..

Code:
while true; do

date >> Internet_Connection_Log.txt
echo >> Internet_Connection_Log.txt
ping  47.182.239.232 -c 1 >> Internet_Connection_Log.txt
echo >> Internet_Connection_Log.txt
sleep 180
done

Make the logging dependent on the RC of ping:

Code:
while : ; do
     if ! ping  -c 1 47.182.239.232 ; then
          printf "\n%s\n" "ping failed at $(date)" >> Internet_Connection_Log.txt
     fi
     sleep 180
done

But wouldn't a log with start- and end-times of failures be better? Note that this makes sense only if the blocks of good and failing internet connections are longer - if it works 10 minutes, then fails for 10 minutes this would make sense, if every second ping fails but every other packet gets through this would create a very large log:

Code:
lFail=0
while : ; do
     if (( lFail )) ; then
          if ping  -c 1 47.182.239.232 ; then
               printf "\n%s\n" "ping worked again at $(date)" >> Internet_Connection_Log.txt
               lFail=0
          fi
     else
          if ! ping  -c 1 47.182.239.232 ; then
               printf "\n%s\n" "ping stopped working at $(date)" >> Internet_Connection_Log.txt
               lFail=1
          fi
     fi
     sleep 1
done

I hope this helps.

bakunin
 

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LEARN ABOUT DEBIAN

macping

MACPING(1)						      General Commands Manual							MACPING(1)

NAME

       macping - A tool for pinging other RouterOS or mactelnetd devices

SYNOPSIS

       mactelnet [options] <MAC-Address|hostname>

DESCRIPTION

       This  tool  enables  you to ping other RouterOS or MAC-Telnetd enabled devices. You can ping either a hostname or a MAC address.  If speci-
       fied, the hostname (identity) will be looked up via MNDP discovery.

OPTIONS

       These programs follow the usual GNU command line syntax.  A summary of options is included below.

       -f     Fast mode, do not wait before sending next ping request. The next ping will be sent immediately when the last ping is received. This
	      cannot be used with -c 0

       -s     Specify the amount of bytes to send in each ping packet, up to ~1400 bytes.

       -c     Number of packets to send before exiting. A value of 0 means unlimited packets and the tool must be exited with Control + C.

       -h     Show summary of options.

       -v     Show version of program.

SEE ALSO

       mndp(1), mactelnet(1), mactelnetd(1).

AUTHOR

       macping was written by Hakon Nessjoen <haakon.nessjoen@gmail.com>.

       This manual page was written by Hakon Nessjoen <haakon.nessjoen@gmail.com>, for the Debian project (and may be used by others).

								 February 27, 2011							MACPING(1)
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