Setting of ntpd on my linux box

サーバの各種のログを監査するためにも、正確な時刻を保持することは大切です。

ntp 4.2.8p13

• tar xvzf ntp-4.2.8p13.tar.gz
• cd ntp-4.2.8p13
• ./configure --with-openssl-libdir=/usr/local/ssl/lib --with-openssl-incdir=/usr/local/ssl/include
• make
• make install

ntp 4.3.93

• tar xvzf ntp-4.3.93.tar.gz
• cd ntp-4.3.93
• patch for ./ntpd/refclock_gpsdjson.c

  *** ./ntpd/refclock_gpsdjson.c.ORG      2015-11-15 01:50:49.000000000 +0900
  --- ./ntpd/refclock_gpsdjson.c  2015-11-15 01:54:48.000000000 +0900
  ***************
  *** 79,84 ****
  --- 79,87 ----
    #include <config.h>
    #endif
    
  + #define LLONG_MIN    LONG_LONG_MIN
  + #define LLONG_MAX    LONG_LONG_MAX
  + 
    #include "ntp_types.h"
    
    #if defined(REFCLOCK) && defined(CLOCK_GPSDJSON) && !defined(SYS_WINNT)
    

• ./configure
• make
• make install

Configure

• vi /etc/ntp.conf
• vi /etc/rc.d/rc.local

  if [ -x /usr/local/bin/ntpd ]
  then
      /usr/local/bin/ntpd
      echo ' ntpd '
  fi
    

ntpq -p

     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
 tusns.tus.ac.jp .INIT.          16 u    - 1024    0    0.000    0.000   0.000
*clock.nc.fukuok .GPS.            1 u  989 1024  377   48.582    2.394  25.513
+clock.tl.fukuok .GPS.            1 u  902 1024  377   48.282    2.376 109.332
+ns.hiroshima-u. 133.41.4.1       2 u   71 1024  377   38.102    1.678   0.302
 LOCAL(0)        .LOCL.          10 l    9   64  377    0.000    0.000   0.002