Changes between Version 11 and Version 12 of ubuntu

Timestamp:

12/13/2018 08:46:38 PM (5 years ago)

Author:

Tim Harvey

Comment:

added RTC details

ubuntu

@@ -258 +258 @@
 
 [=#time]
-== Network Time Configuration
+== Network Time Protocol (NTP) Configuration
 Network Time can set your system time based on network time servers:
  * bionic:
@@ -267 +267 @@
 {{{#!bash
 apt-get install ntp
+}}}
+
+
+[=#rtc]
+== Real Time Clock (RTC) Configuration
+System Time can be set from a Real Time Clock such as the DS1672 that the Gateworks System Controller emulates but this does not seem to work on modern Ubuntu out of the box. While the {{{util-linux}}} package that provides {{{hwclock}}} installs a service {{{/etc/init.d/hwclock.sh}}} it won't run because {{{systemd}}} is installed and the service is masked.
+
+You can work around this by installing a hwclock.service:
+{{{#!bash
+cat << EOF > /etc/systemd/system/hwclock.service
+[Unit]
+Description=Hardware clock synchronization
+[Service]
+Type=oneshot
+ExecStart=/sbin/hwclock --hctosys --utc --adjfile=/etc/adjtime
+ExecStop=/sbin/hwclock --systohc --utc --adjfile=/etc/adjtime
+[Install]
+WantedBy=multi-user.target
+EOF
+systemctl enable hwclock
 }}}