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--- userdoc:tt_ntp_client_server [2016/12/03 00:38] – [Custom Configuration] abelbeck
+++ userdoc:tt_ntp_client_server [2016/12/09 18:24] (current) – [Statistics and Debugging Commands] abelbeck
@@ Line 4: / Line 4: @@
 It can synchronize the system clock with NTP servers, and can also operate as an NTPv4 (RFC 5905) server and peer to provide a time service to other computers in the network.
-!!Note: AstLinux 1.2.9 or later is required!!
+!!Note: AstLinux 1.2.9 or later is required for 'chrony' specific features!!
 ===== NTP Client Configuration =====
@@ Line 12: / Line 12: @@
 Locate the "NTP Server" entry within **Network Time Settings:**
-Enter user defined NTP Servers or select a regional "pool" server, “Save Settings”, then "Restart NTP Time" to apply.
+Enter user defined NTP Servers (space separated) or select a regional "pool" server, “Save Settings”, then "Restart NTP Time" to apply.
 !!Tip ->!! Any changes to the "Timezone" selection within this entry requires a System Reboot to apply.
 ===== NTP Server Configuration =====
@@ Line 21: / Line 20: @@
 Nothing additional to configure, any local LAN interface device can use the LAN gateway address as an NTP server (UDP 123).
-!!Tip ->!! By default, the DHCP "ntp-server" options field provides the NTP server for each network segment.
+!!Tip ->!! By default, the DHCP "ntp-server" options field provides the NTP server for each DHCP configured network segment.
 ===== Custom Configuration =====
-By default a ''/etc/chrony.conf'' file is automatically generated from web interfaces settings.  For most users this is sufficient.
+By default a ''/etc/chrony.conf'' file is automatically generated from web interface settings.  For most users this is sufficient, and recommended, providing automatic ''/etc/chrony.conf'' configuration tweaks over time.
-For advanced users who want addition control of the ''/etc/chrony.conf'' configuration, they can create a persistent ''/mnt/kd/chrony.conf'' file that will be automaticly sym-linked to ''/etc/chrony.conf''.
+For advanced users who want addition control of the ''/etc/chrony.conf'' configuration, they can create a persistent ''/mnt/kd/chrony.conf'' file that will be automatically sym-linked to ''/etc/chrony.conf''.
-Using the CLI, here is a brief how-to to generate a custom configuration for chrony.
+Using the CLI, here is a brief how-to on generating a custom configuration for chrony.
 Create a persistent ''/mnt/kd/chrony.conf'' file from the current automatically generated version:
@@ Line 35: / Line 34: @@
   cp /etc/chrony.conf /mnt/kd/chrony.conf
-Now edit ''/mnt/kd/chrony.conf'' to your liking, probably delete the "Autogenerated" first line.
+Now edit ''/mnt/kd/chrony.conf'' to your liking, probably delete the "Autogenerated" first line so it won't confuse you later.
-Now restart the NTP daemon with the new file:
+Now restart the NTP daemon with the new ''/mnt/kd/chrony.conf'' file:
   service ntpd stop
   service ntpd init
-!!Tip ->!! The Network tab will support editing the ''/mnt/kd/chrony.conf'' file if it exists.
+!!Tip ->!! The web interface Network and Edit tab will support editing the ''/mnt/kd/chrony.conf'' file if it exists.
+If you want to specify a persistent driftfile, the destination directory must have ''ntp:ntp'' user/group privileges.  For example:
+  mkdir /mnt/kd/ntp
+  chown ntp:ntp /mnt/kd/ntp
+Then in your custom ''/mnt/kd/chrony.conf'' file, edit the driftfile line to:
+  driftfile /mnt/kd/ntp/chrony.drift
+Then restart the NTP daemon (as above) to apply the change.
 [[https://chrony.tuxfamily.org/documentation.html|Chrony Documentation]]
 ===== Statistics and Debugging Commands =====
-The ''chronyc'' command connects to the ''chronyd'' daemon to retrieve useful information.  If ''chronyc'' is entered by itself you will enter an interactive mode with a ''chronyc>'' prompt.  Or just enter ''chronyc'' commands on the command line.
+The ''chronyc'' command connects to the ''chronyd'' daemon to retrieve useful information.  If ''chronyc'' is entered by itself you will enter an interactive mode with a ''chronyc>'' prompt //(supports tab-completion of commands)//.  Or just enter ''chronyc'' commands on the command line.
 !!Note ->!! Some ''chronyc'' commands can actively change the ''chronyd'' operation, so carefully choose what commands you issue.  Below are some //safe// examples.