I am trying to set up my GPS to sync ntpd.

I know my GPS works as I can see the 4800 baud data on the serial port using gtkterm.

I set my ntp.conf:

server 127.127.20.0 mode 1 version 4 prefer
fudge 127.127.20.0 refid PPS flag2 1 flag3 time1 0.000 stratum 1

Okay I then made a symlink for /dev/gps0 to /dev/ttyS0

Its got full permissions

When I restart ntpd I get this error in the logs:

/dev/gps0 permission denied

It then freezes ntpd. I have to remove the symlink of /dev/gps0 and restart ntpd, I then get a plain it can't find /dev/gps0 and ntpd starts up.

I read somewhere someone said it is selinux. If it is what option do I need to modify in selinux to get ntpd and gps working?

Thanks!

As a test you can disable selinux completely by adding selinux=0 as a kernel command line option.

BTW what is the make / model of your GPS receiver and does it really have a 1 pulse per second output?

Thanks for the reply!

I don't want to disable selinux, so I will opt to run gpsd.

But now I got a different quuestion so I better post as a new topic.

Thanks again!