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--- linux_wiki:configure_a_system_to_use_time_services [2016/03/03 23:05]
billdozor
+++ linux_wiki:configure_a_system_to_use_time_services [2019/05/25 23:50]
@@ Line 1: / Line 1: @@
-====== Configure A System To Use Time Services ======
-**General Information**
-Managing time using different methods.
-----
-===== Time Options =====
-  * ntp => the default in RHEL 5/6
-  * chrony => the default in RHEL 7 (ntp can still be used instead)
-    * Chrony has faster time sync than ntp and can recover from network connection problems faster.
-----
-===== Chrony =====
-Two new RHEL 7 tools:
-  * chronyd - new red hat 7 time daemon (ntpd was previous daemon)
-  * timedatectl - time and date settings information
-\\
-View current detailed time information
-<code bash>
-timedatectl
-</code>
-\\
-View available timezones
-<code bash>
-timedatectl list-timezones
-</code>
-\\
-Set timezone
-<code bash>
-timedatectl set-timezone America/Chicago
-</code>
-\\
-Set system clock to 12:30pm and 10 seconds:
-<code bash>
-timedatectl set-time 12:30:10
-</code>
-\\
-Enable the use of NTP for time
-<code bash>
-timedatectl set-ntp true
-</code>
-\\
-NTP service config file (chronyd)
-  * /etc/chrony.conf
-\\
-NTP server entry examples in /etc/chrony.conf
-<code bash>
-server 0.pool.ntp.org iburst
-server 1.pool.ntp.org iburst
-server 2.pool.ntp.org iburst
-server 3.pool.ntp.org iburst
-</code>
-  * If you make any changes, chronyd service must be restarted
-\\
-Check status of NTP service, Restart it
-<code bash>
-systemctl status chronyd
-systemctl restart chronyd
-</code>
-\\
-View NTP sources
-<code bash>
-chronyc sources -v
-</code>
-----