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Full Discussion: comparing time stamps
Top Forums UNIX for Dummies Questions & Answers comparing time stamps Post 302336050 by RSC1985 on Tuesday 21st of July 2009 05:30:46 AM
Old 07-21-2009
comparing time stamps

Hello All,

I'm generating timestamps (file creation timestamps) for all the files in a directory. I need to compare all the timestamps.
for example if i have 4 files and their timestamps are 20091125114556,
20091125114556,20091125114556,20091125114556 respectively.

I need to differentiate atleast secs portion to recognize the file. So what i'm going to do is if all timestamps are same then i will modify seconds portion. But my question here is how to compare these timestamps respect to their corresponding files.?

Please suggest a way but not the solution.

Thanks in advance,

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CLOCKDIFF(8)						 System Manager's Manual: iputils					      CLOCKDIFF(8)

clockdiff - measure clock difference between hosts SYNOPSIS
clockdiff [-o] [-o1] destination DESCRIPTION
clockdiff Measures clock difference between us and destination with 1 msec resolution using ICMP TIMESTAMP [2] packets or, optionally, IP TIMESTAMP option [3] option added to ICMP ECHO. [1] OPTIONS
-o Use IP TIMESTAMP with ICMP ECHO instead of ICMP TIMESTAMP messages. It is useful with some destinations, which do not support ICMP TIMESTAMP (f.e. Solaris <2.4). -o1 Slightly different form of -o, namely it uses three-term IP TIMESTAMP with prespecified hop addresses instead of four term one. What flavor works better depends on target host. Particularly, -o is better for Linux. WARNINGS
o Some nodes (Cisco) use non-standard timestamps, which is allowed by RFC, but makes timestamps mostly useless. o Some nodes generate messed timestamps (Solaris>2.4), when run xntpd. Seems, its IP stack uses a corrupted clock source, which is synchro- nized to time-of-day clock periodically and jumps randomly making timestamps mostly useless. Good news is that you can use NTP in this case, which is even better. o clockdiff shows difference in time modulo 24 days. SEE ALSO
ping(8), arping(8), tracepath(8). REFERENCES
[1] ICMP ECHO, RFC0792, page 14. [2] ICMP TIMESTAMP, RFC0792, page 16. [3] IP TIMESTAMP option, RFC0791, 3.1, page 16. AUTHOR
clockdiff was compiled by Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>. It was based on code borrowed from BSD timed daemon. It is now main- tained by YOSHIFUJI Hideaki <yoshfuji@skbuff.net>. SECURITY
clockdiff requires CAP_NET_RAWIO capability to be executed. It is safe to be used as set-uid root. AVAILABILITY
clockdiff is part of iputils package and the latest versions are available in source form at http://www.skbuff.net/iputils/iputils-cur- rent.tar.bz2. iputils-101006 12 April 2011 CLOCKDIFF(8)

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