# Use public servers from the pool.ntp.org project.     # Please consider joining the pool (http://www.pool.ntp.org/join.html).     server 192.168.17.234 iburst 配置上层时钟源，不能为本机       # Ignore stratum in source selection.     stratumweight 0     # Record the rate at which the system clock gains/losses time.     driftfile /var/lib/chrony/drift 配置drift文件路径       # Enable kernel RTC synchronization.     rtcsync 自动同步系统时间到硬件时间       # In first three updates step the system clock instead of slew     # if the adjustment is larger than 10 seconds.     makestep 10 3       # Allow NTP client access from local network.     #allow 192.168/16     allow 192.168.17/24配置下层客户端的访问权限       # Listen for commands only on localhost.     bindcmdaddress 127.0.0.1     bindcmdaddress ::1       # Serve time even if not synchronized to any NTP server.     #local stratum 10       keyfile /etc/chrony.keys       # Specify the key used as password for chronyc.     commandkey 1     # Generate command key if missing.     generatecommandkey       # Disable logging of client accesses.     noclientlog       # Send a message to syslog if a clock adjustment is larger than 0.5 seconds.     logchange 0.5       logdir /var/log/chrony     #log measurements statistics tracking

# chronyc sources -v     210 Number of sources = 1     .-- Source mode  '^' = server, '=' = peer, '#' = local clock.     / .- Source state '*' = current synced, '+' = combined , '-' = not combined,     | /   '?' = unreachable, 'x' = time may be in error, '~' = time too variable.     ||                                                 .- xxxx [ yyyy ] +/- zzzz     ||                                                /   xxxx = adjusted offset,     ||         Log2(Polling interval) -.             |    yyyy = measured offset,     ||                                  \            |    zzzz = estimated error.     ||                                   |           |     MS Name/IP address         Stratum Poll Reach LastRx Last sample     ===============================================================   ================     ^* 192.168.17.234                6   7   377   128  -1712ns[-2000ns] +/-   11ms

# Use public servers from the pool.ntp.org project.     # Please consider joining the pool (http://www.pool.ntp.org/join.html).     server 192.168.17.215配置上层时钟源，不能为本机       # Ignore stratum in source selection.     stratumweight 0       # Record the rate at which the system clock gains/losses time.     driftfile /var/lib/chrony/drift配置drift文件路径       # Enable kernel RTC synchronization.     rtcsync自动同步系统时间到硬件时间       # In first three updates step the system clock instead of slew     # if the adjustment is larger than 10 seconds.     makestep 10 3       # Allow NTP client access from local network.     # Listen for commands only on localhost.     bindcmdaddress 127.0.0.1     bindcmdaddress ::1       # Serve time even if not synchronized to any NTP server.     #local stratum 10       keyfile /etc/chrony.keys     # Specify the key used as password for chronyc.     commandkey 1       # Generate command key if missing.     generatecommandkey       # Disable logging of client accesses.     noclientlog       # Send a message to syslog if a clock adjustment is larger than 0.5 seconds.     logchange 0.5       logdir /var/log/chrony     #log measurements statistics tracking