.TH timed 8

'''

.SS NAME

\fBtimed\fR \- time synchronization service (SNTP)

'''

.SS DESCRIPTION

This service polls a remote NTP server on regular intervals (15 minutes

to 1 hour) and adjusts system clock to match.

'''

.SS USAGE

The service starts idle. Set up the system so that once network becomes

available, \fBtictl\fR would be called to supply \fBtimed\fR with server

addresses to use. It is fine to supply multiple servers; \fBtimed\fR will

pick the closest.

.P

Once the server has been chosen, \fBtimed\fR should step the clock instantly

to bring it within 0.5s from the refence time. Past that point, unless sudden

jumps in time are detected, adjustments will be done slowly over periods of

around half an hour.

.P

In case the primary server stops responding, \fBtimed\fR will try to switch

to one of the spares. Servers added while the primary server is still usable

will be stored, but no attempts will be made to poll them until the primary

fails. It is generally a good idea to keep supplying new addresses occasionally

while \fBtimed\fR is running, to make sure it has some spares ready.

'''

.SH FILES

.IP "/run/ctrl/timed" 4

Control socket.

.P

\fBtimed\fR does not store anything in the file system, and does not need

any file access rights except for \fBbind\fR(2) on its control socket.

'''

.SH SEE ALSO

\fBtictl\fR(1), \fBadjtimex\fR(2).