Chrony

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net-misc/chrony


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Summary: Chrony is a pair of programs (chronyd and chronyc) which are used to maintain the accuracy of the system clock on a computer. chronyd has been specifically written to work well for systems which have only an intermittent (e.g. dial-up) connection to the network where the NTP servers are. It still works well in a "permanently connected" mode.

Use Flags

rtc
Include support for the Linux Real Time Clock interface

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Chrony

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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 Chrony.

# emerge chrony
# rc-update add chronyd default


Use something like the following for your /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:

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.