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How do I check that the GPS is working and acting as an NTP server?

April 26, 2017acting GPS NTP server working

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How do I check that the GPS is working and acting as an NTP server?

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• Switch to root command screen by pressing • Stop the NTP server: ‘/etc/init.d/ntp-server stop’ • Display debugging information for NTP: ‘ntpd -dd’ • Stop the NTP debugging output by pressing C after 5-10 seconds. • Start the NTP server: ‘/etc/init.d/ntp-server start’ • Examine the debugging output. If the GPS is working properly, you should get several lines of output per second. Lines that begin with “refclock_gtlin:” indicate that NTP is getting clock sync information from the GPS. If you get a few lines of output when you start the program, but nothing more after that, it indicates that the computer isn’t talking to the GPS receiver. Possible causes are an unplugged serial cable, unplugged power supply, or broken hardware (GPS receiver, serial port, power supply).