====== Configure A System To Use Time Services ======

**General Information**

Managing time using different methods. 

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===== Time Options =====

  * ntpd => the default in RHEL 5/6
  * chronyd => the default in RHEL 7 (ntpd can still be used instead)
    * Chronyd has faster time sync than ntpd and can recover from network connection problems faster.

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===== 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>

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View available timezones
<code bash>
timedatectl list-timezones
</code>

\\
Set timezone
<code bash>
timedatectl set-timezone America/Chicago
</code>

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Set system clock to 12:30pm and 10 seconds:
<code bash>
timedatectl set-time 12:30:10
</code>

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Enable the use of NTP for time
<code bash>
timedatectl set-ntp true
</code>

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NTP service config file (chronyd)
  * /etc/chrony.conf

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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

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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>

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