Setting Date and Time

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See also [[Timezone]] for instructions on changing the time zone.
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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.
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See [[Timezone]] for instructions on changing the time zone.
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For more information on Linux timekeeping, see [http://www.linuxsa.org.au/tips/time.html 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" ==
 
== Setting the date/time using "date" ==
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== Setting date/time from your linux box ==
 
== Setting date/time from your linux box ==
  
   ssh root@openmoko "date -s `date +%m%d%H%M%Y.%S`"  
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   ssh root@openmoko "date -s `date --utc +%m%d%H%M%Y.%S`"
  
 
== Setting the date/time automatically with NTP ==
 
== Setting the date/time automatically with NTP ==

Revision as of 06:45, 19 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.)

Contents

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

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:

hwclock --systohc

Future Work

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.

Personal tools

See also Timezone for instructions on changing the time zone.

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 +%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

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:

hwclock --systohc

Future Work

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.