Linux/AM5728: Timezone change

user4652979

Part Number: AM5728

Tool/software: Linux

I want to change the system time by ntp but the system timezone is wrong. And I didn't find /etc/timezone in the filesystem. Where is it? Or there is other file which need to be change?

over 6 years ago

0 Kemal R. Shakir over 6 years ago

TI__Guru 55345 points

Hello user4652979,

You need to install tzdata package to have the Time Zone data on your board. You can get it by OE build system and install it with opkg. Later change the time zone by using timedatectl command. Here I am attaching you one https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/791/tzdata_5F00_2018f_2D00_r0_5F00_all.ipk package for reference.

root@am57xx-evm:~# opkg install tzdata_2018f-r0_all.ipk

Best regards,
Kemal

0 Kemal R. Shakir over 6 years ago in reply to Kemal R. Shakir

TI__Guru 55345 points

Hello user4652979,

Were you able to resolve your issue?

Best regards,
Kemal

0 user4652979 over 6 years ago in reply to Kemal R. Shakir

Expert 1860 points

Yes, I can change the timezone. And I use "timedatectl set-ntp true" to enable the ntp. But the time didn't changed.

And I also found "ntpd -dsS" in the /usr/sbin. The command is different from the ondinary ntpd. If I want update the time after boot automaticly, can I use this command?

0 Kemal R. Shakir over 6 years ago in reply to user4652979

TI__Guru 55345 points

user4652979 said:
And I use "timedatectl set-ntp true" to enable the ntp. But the time didn't changed.

Did you wait at least 11 minutes?

0 user4652979 over 6 years ago in reply to Kemal R. Shakir

Expert 1860 points

Yes, but the time didn't change.

And I use "timedatectl status" to check the status which as follows:

Sat Apr  6 10:02:50 CST 2019
root@am57xx-evm:~# timedatectl
      Local time: Sat 2019-04-06 10:02:54 CST
  Universal time: Sat 2019-04-06 02:02:54 UTC
        RTC time: n/a
       Time zone: Asia/Shanghai (CST, +0800)
 Network time on: yes
NTP synchronized: no
 RTC in local TZ: no

May be the time update period is too long. So, can I chage the period? I want to update the time when the system boot finished

0 Kemal R. Shakir over 6 years ago in reply to user4652979

TI__Guru 55345 points

The date and time should be updated once you enable the NTP with "timedatectl set-ntp true". Please, see this thread. What is the status of systemctl status systemd-timesyncd.service command?

0 user4652979 over 6 years ago in reply to Kemal R. Shakir

Expert 1860 points

After useing the command, the log is following:

[[0;1;32m●[[0m systemd-timesyncd.service - Network Time Synchronization
   Loaded: loaded (/lib/systemd/system/systemd-timesyncd.service; enabled; vendor preset: enabled)
   Active: [[0;1;32mactive (running)[[0m since Sat 2019-04-06 09:53:13 CST; 28min ago
     Docs: man:systemd-timesyncd.service(8)
 Main PID: 801 (systemd-timesyn)
   Status: "Idle."
    Tasks: 2 (limit: 4915)
   CGroup: /system.slice/systemd-timesyncd.service
           └─801 /lib/systemd/systemd-timesyncd

Apr 06 09:53:13 am57xx-evm systemd[1]: Starting Network Time Synchronization...
Apr 06 09:53:13 am57xx-evm systemd[1]: Started Network Time Synchronization.

So, the service stated, but the time didn't sync?

0 Kemal R. Shakir over 6 years ago in reply to user4652979

TI__Guru 55345 points

Are you booting your board through NFS?

0 user4652979 over 6 years ago in reply to Kemal R. Shakir

Expert 1860 points

No, it boots from emmc.

0 Kemal R. Shakir over 6 years ago in reply to user4652979

TI__Guru 55345 points

What is the size of your eMMC? Which arago-base-tisdk-image-am57xx-evm.tar.xz or tisdk-rootfs-image-am57xx-evm.tar.xz rootfs you are using?

0 user4652979 over 6 years ago in reply to Kemal R. Shakir

Expert 1860 points

I have just found the reason which is wrong ntp sync IP. After I change the IP address, the ntp-sync works properly.

0 Kemal R. Shakir over 6 years ago in reply to user4652979

TI__Guru 55345 points

That is a good news.

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Linux/AM5728: Timezone change