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Diffstat (limited to 'network/chrony/README')
| -rw-r--r-- | network/chrony/README | 49 |
1 files changed, 40 insertions, 9 deletions
diff --git a/network/chrony/README b/network/chrony/README index b34ffa30b9..23bbc1c4ee 100644 --- a/network/chrony/README +++ b/network/chrony/README @@ -1,12 +1,43 @@ -Chrony is a pair of programs which are used to maintain the accuracy -of the real time clock on a computer via the NTP protocol. +chrony is a versatile implementation of the Network Time Protocol (NTP). It +can synchronise the system clock with NTP servers, reference clocks (e.g. +GPS receiver), and manual input using wristwatch and keyboard. It can also +operate as an NTPv4 (RFC 5905) server and peer to provide a time service to +other computers in the network. -Chrony can serve as both an NTP client for a single computer and as an NTP -server for other computers. +It is designed to perform well in a wide range of conditions, including +intermittent network connections, heavily congested networks, changing +temperatures (ordinary computer clocks are sensitive to temperature), and +systems that do not run continuously, or run on a virtual machine. -See http://chrony.tuxfamily.org/ for more details. +Two programs are included in chrony, chronyd is a daemon that is started at +boot time and chronyc is a command-line interface program which can be used +to monitor chronyd's performance and to change various operating parameters +whilst it is running. -Note: Because each installation's configuration will differ, the SlackBuild -script does not build or install configuration files. See the man pages for -chronyd and chrony.conf (and the contrib and examples directories) for -relevant configuration information. +Note 1: +You must have the 'chrony' group and user to run this script: + $ groupadd -g 354 chrony + $ useradd -u 354 -d /var/lib/chrony -s /bin/false -g chrony chrony +Feel free to use a different uid and gid if desired, but 354 is recommended +to avoid conflicts with other stuff from SlackBuilds.org. + +Note 2: +If you are upgrading from previous version, where the daemon was running +under 'root' user as opposed to 'chrony' user, you need to ensure correct +permissions for /var/run/chrony directory and files under /var/lib/chrony +directory. + +If possible (i.e. you don't have any precious files there), before starting +the daemon, remove /var/run/chrony directory (cronyd will recreate it) and +remove files under /var/lib/chrony directory (cronyd will recreate them). + +Note 3: +The provided configuration file sets up chrony to operate in the most common +scenario, that is NTP client for synchronising local machine time with the +remote NTP server(s) time (using pool.ntp.org by default). See the man pages +for chronyd and chrony.conf (and the contrib and examples directories) for +more details on possible configuration options. + +Note 4: +The provided /etc/rc.d/rc.chrony script can be used to launch the daemon at +boot and to stop it at shutdown. |