TIMEMASTER(8) System Manager's Manual TIMEMASTER(8) (NAME) timemaster - NTP PTP (SYNOPSIS) timemaster [ -nmqv ] [ -l print-level ] -f file (DESCRIPTION) timemaster ptp4l phc2sys chronyd ntpd NTP PTP . PTP phc2sys ptp4l SOCK chronyd SHM ntpd . timemaster NTP PTP PTP (PHC) ptp4l chronyd/ntpd ptp4l phc2sys chronyd/ntpd . . (OPTIONS) -f file timemaster . -n . -l level syslog (syslog) . 6 (LOG_INFO) . -m . -q . -v . -h . (CONFIGURATION FILE) . . . # . . [timemaster] ntp_program NTP . chronyd ntpd . chronyd . timemaster (NOTES) . rundir chronyd ntpd ptp4l . . /var/run/timemaster . first_shm_segment (SHM) ptp4l phc2sys . 0 . timemaster ( gpsd 0 1 ) . restart_processes timemaster . chronyd ntpd timemaster ( ) . timemaster . 1 () . use_vclocks . timemaster PTP . ptp4l . -1 5.18 . [ntp_server address] ntp_server NTP . . minpoll maxpoll NTP . 6 (64 ) 10 (1024 ) . NTP ( NTP ). NTP (LAN) 4 (16 ) . iburst NTP . 1 0 . 0 () . ntp_options server NTP . . [ptp_domain number] ptp_domain PTP . PTP . ptp4l clientOnly . interfaces . interfaces PTP . ptp4l PHC . . PTP ptp4l PTP . ntp_poll SOCK/SHM ptp4l phc2sys . . 2 (4 ) . phc2sys_poll phc2sys PTP ptp4l SOCK/SHM chronyd/ntpd . . 0 (1 ) . delay PTP . chronyd (falsetickers) . 1e-4 (100 ) . ntpd tos mindist . ntp_options refclock server NTP . . ptp4l_option ptp4l PTP ptp4l . ptp_domain . [chronyd] path chronyd . chronyd PATH . options chronyd . . [chrony.conf] chronyd . timemaster : makestep 1 3 chronyd (offset) 1 (step) . [ntpd] path ntpd . ntpd PATH . options ntpd . . [ntp.conf] ntpd . timemaster : restrict default nomodify notrap nopeer noquery restrict 127.0.0.1 restrict ::1 ntpd . [phc2sys] path phc2sys . phc2sys PATH . options phc2sys . -l 5 . [ptp4l] path ptp4l . ptp4l PATH . options ptp4l . -l 5 . [ptp4l.conf] (global) ptp4l . . ( [unicast_master_table]) > timemaster . (NOTES) chronyd ntpd . NTP timemaster . chronyd : 1.31 8 . PHC PTP . ( minpoll maxpoll ntp_poll) 2 (4 ) 1.30 . 1.30 0 1 NTP PTP (ntp_poll) . ntpd : 4.2.8p1 SHM ntpd - (owner-only) . (world access) . 4.2.8p1 mode timemaster - . 3 (8 ) . SHM 4.2.7p303 . (EXAMPLES) NTP PTP : [ntp_server 10.1.1.1] [ptp_domain 0] interfaces eth0 [ptp_domain 1] interfaces eth1 timemaster : [ntp_server 10.1.1.1] minpoll 3 maxpoll 4 iburst 1 ntp_options key 12 [ptp_domain 0] interfaces eth0 eth1 ntp_poll 0 phc2sys_poll -2 delay 10e-6 ntp_options prefer ptp4l_option clock_servo linreg ptp4l_option delay_mechanism P2P [timemaster] ntp_program chronyd rundir /var/run/timemaster first_shm_segment 1 restart_processes 0 use_vclocks 0 [chronyd] path /usr/sbin/chronyd options [chrony.conf] makestep 1 3 logchange 0.5 rtcsync driftfile /var/lib/chrony/drift [ntpd] path /usr/sbin/ntpd options -u ntp:ntp [ntp.conf] restrict default nomodify notrap nopeer noquery restrict 127.0.0.1 restrict ::1 driftfile /var/lib/ntp/drift [phc2sys] path /usr/sbin/phc2sys options -l 5 [ptp4l] path /usr/sbin/ptp4l options [ptp4l.conf] logging_level 5 (SEE ALSO) chronyd(8), ntpd(8), phc2sys(8), ptp4l(8) linuxptp January 2021 TIMEMASTER(8)