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Top Forums UNIX for Dummies Questions & Answers ksh to check second time difference between two servers Post 302814147 by depam on Tuesday 28th of May 2013 09:15:07 PM
Old 05-28-2013
ksh to check second time difference between two servers

I am currently setting up a public key authentication between servers. The goal is to get the date via `ssh hostname date` on all the 4 remote servers , put the value in a text file on the central server and compare the date (specifically seconds) for each server date output to check if time is actually sync. I know there will be a second interval while logging in to the system via ssh and retrieving the time. But I am thinking of a margin like 3 - 5 seconds.

Is there any specific script to compare the output of date command and get the difference of seconds. I am thinking of creating a script to get the seconds via 'cut' command but it easily breaks if it reaches ":00" and the result will be inaccurate.

Thanks.

Last edited by Scott; 06-01-2013 at 03:50 AM.. Reason: Moved thread - Not an AIX issue
 

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DATE(1) 						      General Commands Manual							   DATE(1)

NAME
date - print or set the date and time SYNOPSIS
date [-qsu] [[MMDDYY]hhmm[ss]] [+format] OPTIONS
-q Read the date from stdin -s Set the time (implicit for -q or a date string) -u Print the date as GMT -t Use this number of seconds instead of current time EXAMPLES
date # Print the date and time date 0221921610 # Set date to Feb 21, 1992 at 4:10 p.m. DESCRIPTION
With the -q flag or a numeric argument, date sets the GMT time and date. MMDDYY refers to the month, day, and year; hhmmss refers to the hour, minute and second. Each of the six fields must be exactly two digits, no more and no less. date always display the date and time, with the default format for the system. The -u flag request GMT time instead of local time. A format may be specified with a + followed by a printf-like string with the following options: %% % character %A Name of the day %B Name of the month %D mm/dd/yy %H Decimal hour on 2 digits %I Decimal hour modulo 12 on 2 digits %M Decimal minute on 2 digits %S Decimal seconds on 2 digits %T HH:MM:SS %U Decimal week number, Sunday being first day of week %W Decimal week number, Monday being first day of week %X Same as %T %Y Decimal year on 4 digits %Z Time Zone (if any) %a Abbreviated name of the day %b Abbreviated name of the month %c Appropriate date & time (default format) %d Decimal day of the month on 2 digits %e Same as %d, but a space replaces leading 0 %h Same as %b %j Decimal dey of the year on 3 digits %m Decimal month on 2 digits %n Newline character %p AM or PM %r 12-hour clock time with AM/PM %s Number of seconds since the epoch %t Tab character %w Decimal day of the week (0=Sunday) %x Same as %D %y Decimal year on 2 digits SEE ALSO
time(2), ctime(3), readclock(8). DATE(1)
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