topic Re: script to change date in my crontab in Operating System - HP-UX

script to change date in my crontab

aretana — Mon, 19 Dec 2005 19:16:26 GMT

i have a script in the crontab to change the system date, but not work because is waiting for the answer to response... my script is as follows:

##############
month=12
day=19
hour=`date |cut -c 12-13`
min=`date |cut -c 15-16`
min=`expr $min - 5`
year=2005
chardate=$month$day$hour$min$year
date $chardate
##############

how to make to date command not ask for time backwards?

date: do you really want to run time backwards?[yes/no]Only "yes" will make it take!

thanks

Re: script to change date in my crontab

Sanjay_6 — Mon, 19 Dec 2005 19:18:42 GMT

hi,

why do you want to change the date / time using the cron.

Thanks

Re: script to change date in my crontab

aretana — Mon, 19 Dec 2005 19:20:35 GMT

because i have to synchronize my system with other box after the cold backup (at 4:15 a.m)

Re: script to change date in my crontab

Bill Hassell — Mon, 19 Dec 2005 19:23:52 GMT

The question is asked for a good reason...setting the date/time backwards can break a lot of date-dependent functions including cron and especially database applications. Changing time/date is so disruptive for many applications that many system adminstrators disable date changes with a command wrapper. Perhaps you can explain the reason to change the time/date at all.

Re: script to change date in my crontab

James R. Ferguson — Mon, 19 Dec 2005 19:32:20 GMT

Hi:

To keep your servers with consistent, correct time, use 'xntpd' (NTP = Network Time Protocol).

You can configure this via SAM or by editing a few simple configuration files.

There is an excellent guide in the "Installing and Administering Internet
Services" manual in chapter-7.

You can find an external source to which to synchronize your server, here:

http://ntp.isc.org/bin/view/Servers/WebHome

Regards!

...JRF...

Re: script to change date in my crontab

Yogeeraj_1 — Mon, 19 Dec 2005 23:22:38 GMT

hi,

Time Server is the way to go!

YOu must configure you servers to synchronize their date/times with that of the Time Server.

You will be more accurate/scientific

kind regards
yogeeraj

Re: script to change date in my crontab

Yogeeraj_1 — Mon, 19 Dec 2005 23:35:22 GMT

hi again,

see also:
http://www.ntp.org

kind regards
yogeeraj

Re: script to change date in my crontab

Muthukumar_5 — Tue, 20 Dec 2005 00:58:50 GMT

You got the problem when changing the time in the machine using cron tab? If you want to do after that then,

##############
month=12
day=19
hour=`date |cut -c 12-13`
min=`date |cut -c 15-16`
min=`expr $min - 5`
year=2005
chardate=$month$day$hour$min$year
date $chardate<<-EOF
yes
EOF
##############

will do it.

-Muthu

Re: script to change date in my crontab

aretana — Tue, 20 Dec 2005 08:53:59 GMT

Muthu, this is exactly what i want...
thank yuo all for the comments and solutions

Re: script to change date in my crontab

aretana — Tue, 20 Dec 2005 09:08:20 GMT

the reason for make the script is because the server are advanced 5 minuts of the other server, and have a database store procedure that insert data in the other server, but the store procedure validates that the date is not going to be greater than the system date.
This script only will be executed one time, after will be removed from crontab...