Forum Discussion

Nimbostratus

Jul 19, 2011

Running long-living tcpdumps on BigIP

Hi guys, I'm not quite sure if this is the right forum to post the question, but I couldn't find a more suitable one... I often need the possibility to monitor specific client conn...

config

design

RiverFish

Altostratus

Nov 21, 2014

Unfortunately I've never created a cron job, could you break it down for me please? Let's say I wanted the tcpdump job to kick off at 10:30 PM and run until 3:00 AM.

nitass
Employee
Nov 23, 2014
>Unfortunately I've never created a cron job Schedule Tasks on Linux Using Crontab http://kvz.io/blog/2007/07/29/schedule-tasks-on-linux-using-crontab/ it is just tcpdump and killall commands. you are aware that W option will overwrite old file, aren't you? e.g. [root@ve11a:Active:In Sync] config crontab -l cron tab for root 1-59/10 * * * * /usr/bin/diskmonitor MAILTO="" 51 * * * * /usr/bin/copy_rrd save 27 21 * * * /usr/sbin/tcpdump -nni 0.0:nnn -s0 -C 1 -W 10 -w /var/tmp/test 30 21 * * * killall tcpdump [root@ve11a:Active:In Sync] config ls -l /shared/tmp/|grep test -rw-r--r-- 1 pcap pcap 1000011 Nov 23 21:29 test0 -rw-r--r-- 1 pcap pcap 1000028 Nov 23 21:29 test1 -rw-r--r-- 1 pcap pcap 1000171 Nov 23 21:29 test2 -rw-r--r-- 1 pcap pcap 710416 Nov 23 21:30 test3 -rw-r--r-- 1 pcap pcap 1000020 Nov 23 21:29 test4 -rw-r--r-- 1 pcap pcap 1000147 Nov 23 21:29 test5 -rw-r--r-- 1 pcap pcap 1000119 Nov 23 21:29 test6 -rw-r--r-- 1 pcap pcap 1000237 Nov 23 21:29 test7 -rw-r--r-- 1 pcap pcap 1000086 Nov 23 21:29 test8 -rw-r--r-- 1 pcap pcap 1000256 Nov 23 21:29 test9