Setting Date and Time
(advise to allow firewall traffic on port 123)
m (→Syncing the hardware clock: added info on how to set the hw clock on ASU)
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== Future Work ==
== Future Work ==
Revision as of 12:18, 27 July 2008
Linux systems (such as the Freerunner) prefer that the system clock be set to universal time (UTC). Then, you will need to configure the timezone to display the time adjusted to local time.
See Timezone for instructions on changing the time zone.
For more information on Linux timekeeping, see Linux, Clocks, and Time. (But ignore mentions of /etc/sysconfig/clock. That doesn't apply to the Openmoko environment.)
Setting the date/time using "date"
To change the date on your Freerunner, issue one of the following commands:
date -s MMDDhhmm date -s MMDDhhmmYYYY date -s MMDDhhmmYYYY.ss
where MM is the month, 01-12; DD is the day, 01-31; hhmm is the time, 0000-2359; YYYY is the optional year, and .ss is the optional seconds.
Setting date/time from your linux box
ssh root@openmoko "date -s `date --utc +%m%d%H%M%Y.%S`"
Setting the date/time automatically with NTP
If your Freerunner is connected to the internet, you can instead set the time automatically:
opkg install ntpclient ntpclient -s -h pool.ntp.org
If your Freerunner is connecting to the internet through a USB host, make sure you allow UDP traffic to pass through on port 123 (NTP) on your host machine or you may get a "no route to host" error from ntpclient.
Syncing the hardware clock
No matter which method you used above, sync the hardware clock with the system time to make your change persist over reboots:
Note: if you run the ASU image, hwclock will not work. Instead you can use:
echo "W\n" > /var/spool/at/trigger
Presumably it might also be possible to use gpspipe (or something else) to set the date once you have a gps fix? In addition, the phone stack should set the date, time, and timezone once connected to a network.