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1¡¢±àÒë°²×°ntp server
wget http://www.eecis.udel.edu/~ntp/ntp_spool/ntp4/ntp-4.2.4p4.tar.gz
tar zxvf ntp-4.2.4p4.tar.gz
cd ntp-4.2.4p4
./configure --prefix=/usr/local/ntp --enable-all-clocks --enable-parse-clocks
make && make install
×¢£ºÈçÒÔÉÏÏÂÔصØÖ·ÎÞ·¨·ÃÎÊ£¬Çë´Óntp¹Ù·½ÏÂÔØÍøÒ³£¨http://www.ntp.org/downloads.html£©Ñ°ÕÒÏÂÔصØÖ·¡£
2¡¢ÐÞ¸Äntp.confÅäÖÃÎļþ
vi /etc/ntp.conf
¢Ù¡¢µÚÒ»ÖÖÅäÖãºÔÊÐíÈκÎIPµÄ¿Í»§»ú¶¼¿ÉÒÔ½øÐÐʱ¼äͬ²½
½«“restrict default nomodify notrap noquery”ÕâÐÐÐ޸ijɣº
restrict default nomodify
ÅäÖÃÎļþʾÀý£º/etc/ntp.conf
¢Ú¡¢µÚ¶þÖÖÅäÖãºÖ»ÔÊÐí192.168.18.***Íø¶ÎµÄ¿Í»§»ú½øÐÐʱ¼äͬ²½
ÔÚrestrict default nomodify notrap noquery£¨±íʾĬÈϾܾøËùÓÐIPµÄʱ¼äͬ²½£©Ö®ºóÔö¼ÓÒ»ÐУº
restrict 192.168.18.0 mask 255.255.255.0 nomodify
ÅäÖÃÎļþʾÀý£º/etc/ntp.conf
3¡¢ÒÔÊØ»¤½ø³ÌÆô¶¯ntpd
/usr/local/ntp/bin/ntpd -c /etc/ntp.conf -p /tmp/ntpd.pid
4¡¢ntpdÆô¶¯ºó£¬¿Í»§»úÒªµÈ¼¸·ÖÖÓÔÙÓëÆä½øÐÐʱ¼äͬ²½£¬·ñÔò»áÌáʾ“no server suitable for synchronization found”´íÎó¡£
¶þ¡¢ÅäÖÃʱ¼äͬ²½¿Í»§»ú
vi /var/spool/cron/root
Ôö¼ÓÒ»ÐУ¬ÔÚÿÌìµÄ5µã13·Ö¡¢9µã13·Ö¡¢14µã13·Ö¡¢19µã13·ÖÓëʱ¼äͬ²½·þÎñÆ÷½øÐÐͬ²½
13 5,9,14,19 * * * /usr/sbin/ntpdate 192.168.18.2
±¸×¢£ºÈç¹û¿Í»§»úûÓÐntpdate£¬¿ÉÒÔÏÂÔØntpdate.tar.gzµ½/usr/sbin/Ŀ¼£¬È»ºó½âѹ£º
wget http://blog.s135.com/attachment/200708/ntdate.tar.gz
cd /usr/sbin/
tar zxvf ntpdate.tar.gz


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