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| author | Daniel Mack <github@zonque.org> | 2015-08-17 10:09:16 +0200 |
|---|---|---|
| committer | Daniel Mack <github@zonque.org> | 2015-08-17 10:09:16 +0200 |
| commit | 4fe66a7155a183308d5e323d303f494d7b135b87 (patch) | |
| tree | fa368cb292447a433e15fb8eee4d3864c3b3bffb /man/timedatectl.xml | |
| parent | 2f258a317d55890bbb7f613df4c884154be3fad0 (diff) | |
| parent | 8731be1a529272e8010505627316161adb476842 (diff) | |
Merge pull request #970 from poettering/timedatectl-set-netp
man: extend documentation for timedatectl's set-ntp command
Diffstat (limited to 'man/timedatectl.xml')
| -rw-r--r-- | man/timedatectl.xml | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/man/timedatectl.xml b/man/timedatectl.xml index 2d42b41d5e..9a86c4126a 100644 --- a/man/timedatectl.xml +++ b/man/timedatectl.xml @@ -166,12 +166,27 @@ <term><command>set-ntp [BOOL]</command></term> <listitem><para>Takes a boolean argument. Controls whether - network time synchronization is enabled (if available). This - enables or disables the - <filename>systemd-timesyncd.service</filename> unit. Note that - even if this command turns time synchronization off a - different system service might still synchronize the clock - with the network.</para></listitem> + network time synchronization is active and enabled (if + available). This enables and starts, or disables and stops the + <filename>systemd-timesyncd.service</filename> unit. It does + not affect the state of any other, unrelated network time + synchronization services that might be installed on the + system. This command is hence mostly equivalent to: + <command>systemctl enable --now + systemd-timesyncd.service</command> and <command>systemctl + disable --now systemd-timesyncd.service</command>, but is + protected by a different access policy.</para> + + <para>Note that even if time synchronization is turned off + with this command another, unrelated system service might + still synchronize the clock with the network. Also note that + strictly speaking + <filename>systemd-timesyncd.service</filename> does more than + just network time synchronization as it ensures a monotonic + clock on systems without RTC even if no network is + available. See + <citerefentry><refentrytitle>systemd-timesyncd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry> + for details about this.</para></listitem> </varlistentry> </variablelist> |