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Full Discussion: Need help with Crontab
Operating Systems Linux Need help with Crontab Post 302509762 by Nasasdge on Thursday 31st of March 2011 04:14:49 PM
Old 03-31-2011
Need help with Crontab

Im setting up crontab to run a command at 0800
my current crontab entry is:

Code:
0 8 * * 1,2,3,4,5 tcpdump -s2000 -w'flowroute-%H%M.pcap' -G900 -W34

This should start the script at 800am monday through friday as i understand it.
I have tested this a couple times and it does not start as planned.
If this needs to be written into a script, I have tried that with this script

Code:
#!/bin/bash

#capture packets in 15 min segments and stops after 36 segments

tcpdump -s2000 -w'flowroute-%H%M.pcap' -G900 -W36

I have had no luck with both.

Any suggestions would be much appreciated.
 

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PCAP_SET_TSTAMP_TYPE(3PCAP)											       PCAP_SET_TSTAMP_TYPE(3PCAP)

NAME
pcap_set_tstamp_type - set the time stamp type to be used by a capture device SYNOPSIS
#include <pcap/pcap.h> int pcap_set_tstamp_type(pcap_t *p, int tstamp_type); DESCRIPTION
pcap_set_tstamp_type() sets the the type of time stamp desired for packets captured on the pcap descriptor to the type specified by tstamp_type. It must be called on a pcap descriptor created by pcap_create() that has not yet been activated by pcap_activate(). pcap_list_tstamp_types() will give a list of the time stamp types supported by a given capture device. See pcap-tstamp(7) for a list of all the time stamp types. RETURN VALUE
pcap_set_tstamp_type() returns 0 on success if the specified time stamp type is expected to be supported by the capture device, PCAP_WARN- ING_TSTAMP_TYPE_NOTSUP if the specified time stamp type is not supported by the capture device, PCAP_ERROR_ACTIVATED if called on a capture handle that has been activated, and PCAP_ERROR_CANTSET_TSTAMP_TYPE if the capture device doesn't support setting the time stamp type. SEE ALSO
pcap(3PCAP), pcap_list_tstamp_types(3PCAP), pcap_tstamp_type_name_to_val(3PCAP), pcap-tstamp(7) 5 December 2014 PCAP_SET_TSTAMP_TYPE(3PCAP)
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