Difference between revisions of "Set Up Chrony For Accurate System Time"

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It's important that your Funtoo Linux system has an accurate clock. NTP (network time protocol) can ensure your clock is accurate at all time.
 
It's important that your Funtoo Linux system has an accurate clock. NTP (network time protocol) can ensure your clock is accurate at all time.
  
My favorite and recommended NTP client/server is '''{{Package|net-misc/chrony}}'''. It is recommended for Funtoo systems:
+
The recommended NTP client/server is '''{{Package|net-misc/chrony}}'''.
  
 
<console>
 
<console>
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</console>
 
</console>
  
Use something like the following for your <tt>/etc/chrony/chrony.conf</tt>:
+
Use something like the following for your <code>/etc/chrony/chrony.conf</code>:
  
<pre>
+
<console>
 +
###i## nano /etc/chrony/chrony.conf
 
server time.apple.com
 
server time.apple.com
 
maxupdateskew 100
 
maxupdateskew 100
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sched_priority 1
 
sched_priority 1
 
lock_all
 
lock_all
</pre>
+
</console>
  
Chronyd can then be started immediately by running <tt>rc</tt> to start all new services:
+
Chronyd can then be started immediately by running <code>rc</code> to start all new services:
  
 
<console>
 
<console>
# ##i##rc
+
###i## rc
 
</console>
 
</console>
  
Because Funtoo Linux starts network daemons without waiting for an Internet connection to become available, and because chrony will attempt to synchronize the clock over the Internet when it first starts, you must manually configure chronyd to be dependent on whatever method you use to enable your outbound network connectivity. For example, if using <tt>dhcpcd</tt>, add the following to <tt>/etc/conf.d/chronyd</tt>:
+
Because Funtoo Linux starts network daemons without waiting for an Internet connection to become available, and because chrony will attempt to synchronize the clock over the Internet when it first starts, you must manually configure chronyd to be dependent on whatever method you use to enable your outbound network connectivity. For example, if using <code>dhcpcd</code>, add the following to <code>/etc/conf.d/chronyd</code>:
  
<pre>
+
<console>
 +
###i## nano /etc/conf.d/chronyd
 
rc_need=dhcpcd
 
rc_need=dhcpcd
</pre>
+
</console>
 +
 
 +
You should notice a marked improvement in your system clock's accuracy. If your system time was off by a significant amount, <code>chronyd</code> will gradually correct your clock while the system runs.
  
You should notice a marked improvement in your system clock's accuracy. If your system time was off by a significant amount, <tt>chronyd</tt> will gradually correct your clock while the system runs.
 
 
[[Category:System]]
 
[[Category:System]]

Revision as of 00:11, 11 January 2014

Accurate System Time (NTP)

It's important that your Funtoo Linux system has an accurate clock. NTP (network time protocol) can ensure your clock is accurate at all time.

The recommended NTP client/server is net-misc/chrony (package not on wiki - please add).

# emerge chrony
# rc-update add chronyd default

Use something like the following for your /etc/chrony/chrony.conf:

# nano /etc/chrony/chrony.conf
server time.apple.com
maxupdateskew 100
driftfile /etc/chrony/chrony.drift
keyfile /etc/chrony/chrony.keys
commandkey 1
dumponexit
dumpdir /var/log/chrony
initstepslew 10 time.apple.com
logdir /var/log/chrony
log measurements statistics tracking
logchange 0.5
mailonchange me@emailprovider.com 0.5
rtcfile /etc/chrony/chrony.rtc
rtconutc
sched_priority 1
lock_all

Chronyd can then be started immediately by running rc to start all new services:

# rc

Because Funtoo Linux starts network daemons without waiting for an Internet connection to become available, and because chrony will attempt to synchronize the clock over the Internet when it first starts, you must manually configure chronyd to be dependent on whatever method you use to enable your outbound network connectivity. For example, if using dhcpcd, add the following to /etc/conf.d/chronyd:

# nano /etc/conf.d/chronyd
rc_need=dhcpcd

You should notice a marked improvement in your system clock's accuracy. If your system time was off by a significant amount, chronyd will gradually correct your clock while the system runs.