Raspberry pi won't update time

iFunction · 12-14-2015, 07:06 AM

Hi there,

This is really annoying, there is a lot about this issue, but all refer to editing "rc.conf" which Raspbian Jessie (December 2015) does not seem to have.

Can anyone explain how I can get it to update the time from an NTP server please. I have also tried using:

Code:

sudo ntpd -gq

Which does absolutely nothing at all.

Please help this is quite frustrating and is the only task that is essential in this particular build.

Kind regards
iFunc

Soadyheid · 12-14-2015, 07:25 AM

I may have the wrong end of the stick but I don't believe the Raspberry Pi has a RTC to update.

Play Bonny!

michaelk · 12-14-2015, 07:50 AM

That does not mean you can not run ntp to set the system clock.

How is your network currently configured? Is this a master or slave?
Does the Pi acquire an IP address?
Can it ping the internet i.e ping 8.8.8.8? (google)

Soadyheid · 12-14-2015, 08:05 AM

Quote:

That does not mean you can not run ntp to set the system clock.

Thanks for the clarification michael I wasn't sure.

Play Bonny!

iFunction · 12-14-2015, 08:24 AM

Hi there,

Currently, the pi I am playing with is stand alone until I can fix this issue. So:
The pi is currently connected to the internet at work (Though to be fair it was updating on my home network...?)

Ah... does the time update through a different port than the internet. Yes it does, it uses port 123 which i won't be allowed to access.

Ok change of question then, how can I get the time to update through port 80 in the event that port 123 is blocked?

Kind regards
iFunc

onebuck · 12-14-2015, 09:21 AM

Hi,

From https://www.raspberrypi.org/forums/v...it=RTC#p861950

Quote:

How much is your Pi off? Minutes, hours, days?

If you have a permanent internet connection you don't need an RTC, NTP will synchronize the time with the internet. Raspbian has NTP installed by default, but if you don't have it, it is easy to install.

EDIT: I use a cron.hourly script called time;

Code:

#!/bin/sh
#11-06-06 gws use ntp
 /usr/sbin/ntpdate -v north-america.pool.ntp.org 1.north-america.pool.ntp.org 2.north-america.pool.ntp.org 3.north-america.pool.ntp.org &&hwclock --systohc

You can use a RTC shield or just change the script to set the time & date

Hope this helps.
Have fun & enjoy!

michaelk · 12-14-2015, 09:22 AM

Are the Pis always going to be setup at your place of work?

I've seen some posts on running ntp via a VPN but that might not be practical in your case.

suicidaleggroll · 12-14-2015, 10:35 AM

Quote:

Originally Posted by iFunction

Ok change of question then, how can I get the time to update through port 80 in the event that port 123 is blocked?

ntp uses port 123, port 80 is http. In order to use ntp over port 80, you'd need to be connecting to a server that runs an ntp server that listens on port 80, which is HIGHLY unlikely.

You could use an ssh tunnel to route your ntp requests outside of your network, but the real question is why on earth your work blocks OUTGOING connections on 123? Is it because they run their own local NTP server they want everyone to use? How is NTP configured on your desktops/workstations?