Time problems when dual booting Ubuntu Linux and Windows 10

Some OS like Linux set the hardware clock to UTC.  Others like Windows use Local time.  There are several ways to work around this issue but the easiest for me is below:

Change Windows 10:

Windows Registry Editor Version 5.00



Make Linux use 'Local' time

To tell your Ubuntu system that the hardware clock is set to 'local' time:

Pre-Ubuntu 15.04 systems (e.g. Ubuntu 14.04 LTS):

  1. edit /etc/default/rcS
  2. add or change the following section
    # Set UTC=yes if your hardware clock is set to UTC (GMT)

Ubuntu 15.04 systems and above (e.g. Ubuntu 16.04 LTS):

  1. open a terminal and execute the following command
    timedatectl set-local-rtc 1

systemd upstart sysvinit start stop service

So you have lots of Linux servers and want a quick way to know if the one you are on at the moment is running systemd or upstart or sysvinit.  How should you start / stop / that service? It can be confusing with all the distro variations out there but perhaps some of these will help:

Perhaps this will help:

/usr/lib/systemd tells you you're on a systemd based system.
/usr/share/upstart is a pretty good indicator that you're on an Upstart-based system.
/etc/init.d tells you the box has SysV init in its history

The init process is always assigned PID 1. The /proc filesystem provides a way to obtain the path to an executable given a PID.

In other words:

nathan@nathan-desktop:~$ sudo stat /proc/1/exe
  File: '/proc/1/exe' -> '/sbin/upstart'
As you can see, the init process on my Ubuntu 14.10 box is Upstart. Ubuntu 15.04 uses systemd, so running that command instead yields:

nathan@nathan-gnome:~$ sudo stat /proc/1/exe
  File: '/proc/1/exe' -> '/lib/systemd/systemd'
If the system you're on gives /sbin/init as a result, then you'll want to try statting that file:

nathan@nathan-gnome:~$ sudo stat /proc/1/exe
  File: '/proc/1/exe' -> '/sbin/init'
nathan@nathan-gnome:~$ stat /sbin/init
  File: ‘/sbin/init’ -> ‘/lib/systemd/systemd’
You can also execute it to find out more:

[user@centos ~]$ /sbin/init --version
init (upstart 0.6.5)

So this is the newer in Ubuntu:

Starting with Ubuntu 15.04, Upstart will be deprecated in favor of Systemd. With Systemd to manage the services we can do the following:

systemctl start SERVICE - Use it to start a service. Does not persist after reboot

systemctl stop SERVICE - Use it to stop a service. Does not persist after reboot

systemctl restart SERVICE - Use it to restart a service

systemctl reload SERVICE - If the service supports it, it will reload the config files related to it without interrupting any process that is using the service.

systemctl status SERVICE - Shows the status of a service. Tells whether a service is currently running.

systemctl enable SERVICE - Turns the service on, on the next reboot or on the next start event. It persists after reboot.

systemctl disable SERVICE - Turns the service off on the next reboot or on the next stop event. It persists after reboot.

systemctl is-enabled SERVICE - Check if a service is currently configured to start or not on the next reboot.

systemctl is-active SERVICE - Check if a service is currently active.

systemctl show SERVICE - Show all the information about the service.

sudo systemctl mask SERVICE - Completely disable a service by linking it to /dev/null; you cannot start the service manually or enable the service.

sudo systemctl unmask SERVICE - Removes the link to /dev/null and restores the ability to enable and or manually start the service.