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Old 02-09-2019, 11:06 AM   #1
Christopher Wylie
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Registered: Mar 2018
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VM`s in VirtualBox show wrong time after some time


I have some VM on VirtualBox. They recently do not show the right date or time, I think it is the time from the last time the VM was running.
I searched some on the Internet, but I find only Guest Addition is required.
Is it possible to fix time without Guest Addition?
I have 10 different VM.

I think this is new, was not happening before.

Thank You.
Old 02-09-2019, 12:07 PM   #2
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Distribution: Linux Mint 19.1 MATE
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What is your host operating system and what are your guest operating systems?

Does the issue replicate itself across all guests?

Which version of VirtualBox are you using?

Why don't you want to install Guest Additions?
Old 02-09-2019, 02:48 PM   #3
Registered: Apr 2009
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I run my VMs in VMWare, not sure if it's different from VBox
If you run this command: timedatectl, you should get something similar to the output below:
[jo@localhost ~]$ timedatectl
               Local time: Sat 2019-02-09 12:24:34 MST
           Universal time: Sat 2019-02-09 19:24:34 UTC
                 RTC time: Sat 2019-02-09 19:24:25
                Time zone: America/North Pole (MST, -0700)
System clock synchronized: yes
              NTP service: active
          RTC in local TZ: no
All my VMs have "System clock synchronized: yes", and "RTC in local TZ: no". But when I install directly to the HDD instead of in VMWare, it's the opposite for System clock synchronized, it will be "no", this changes the hardware clock to UTC which throws it off a few hours due to my timezone and the time displayed in all OSs including Windows is out by a few hours.
To rectify this in the Linux installed to the HDD, I change "RTC in local TZ" to "yes" with this command: timedatectl set-local-rtc 1.
Basically, they should be opposite where if System clock synchronized is set to "yes", RTC in local TZ should be set to "no", if System clock synchronized is set to "no", RTC in local TZ should be set to "yes", this appears to keep my hardware clock to correct local time and all OSs be it VMs or HDD installs display correct time.
You can learn more about this over here.

Last edited by Brains; 02-09-2019 at 02:50 PM.


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