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/etc/sysconfig/clock
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TIMEZONE="Asia/Beijing"
DEFAULT_TIMEZONE="Asia/Beijing"
#ͬʱȷ±£ /etc/localtimeÎļþÊÇ/usr/share/zoneinfo/Asia/BeijingµÄ¿½±´
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10 5 * * * root /usr/sbin/ntpdate 221.139.48.11 && /sbin/hwclock -w
#±£Ö¤Ã¿ÌìÔçÉÏ5:10·ÖʱÓë ntp·þÎñÆ÷ 221.139.48.11½øÐиüÐÂ,ͬʱдÈëµ½bios
2£ºranlibºÍar
±¾ÎÄת×Ô£ºhttp://blog.ixpub.net/html/53/t-1033153.html
ranlib ¾ÍÊÇΪ .a µµ°¸ÎļþÖеÄÿ¸ö.oÄ¿±êÎļþµÄ·ûºÅ½¨Á¢Ò»¸öË÷Òý,ÒÔ´ËÀ´¼Ó¿ì¿âµÄ²éѯºÍÁ¬½ÓËÙ¶È.
GNU ranlib ÍêÈ«µÈͬÓÚ  ar -s. µäÐÍÔËÓÃÓÚ°ÑһϵÁÐ .o´ò³ÉÒ»¸ö .a ¾²Ì¬¿â.
Äã¿ÉÒÔÓà nm -s
 À´¿´ÆäË÷Òý.
ar -rc  libmy.a test.o test1.o
ranlib libmy.a
nm -s libmy.a
ÆäÖÐÔÚGNU ar, ¿ÉÒÔÓÃ ar -rcs  libmy.a test.o test1.oÀ´´úÌæ
ar -rc  libmy.a test.o test1.o
ranlib libmy.a
3:¹²ÏíÉÏÍø
iptables -t nat -A POSTROUTE -s 192.168.0.0/16 -o eth0 -j -SNAT --to-source 10.3.198.108
echo 1 > /proc/sys/net/ipv4/ip_forward
µÚÒ»¾äÖÐ
-t nat ÖÆ¶¨²Ù×÷nat ±í
-A POSTROUTE Ö¸¶¨Ôö¼Ó×îºóµÄ³ö¹æÔò
-s 192.168.0.0/16Ö¸¶¨À´Ô´ÍøÂç
-o eth0 Ö¸¶¨Õë¶ÔÄĸöÍø¿¨
-j  jump
-SNAT --to-source 10.3.198.108 Ö¸¶¨½«Ô´µØÖ·ÐÞ¸ÄΪ10.3.198.108
#ÕâÑù±£Ö¤ËùÓÐÔÚ192.168.0.0/16Öз¢Ïòeth0µÄÊý¾ÝÔ´µØÖ·½«±»ÐÞ¸ÄΪ10.3.198.108
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4£ºmartian source ½â¾ö
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Jan 12 14:52:50 node2 kernel: martian source 255.255.255.255 from 10.3.198.111, on dev eth1
Jan 12 14:52:50 node2 kernel: ll header: ff:ff:ff:ff:ff:ff:00:22:68:85:22:2e:08:00
Jan 12 14:52:54 node2 kernel: martian source 255.255.255.255 from 10.3.198.111, on dev eth1
Jan 12 14:52:54 node2 kernel: ll header: ff:ff:ff:ff:ff:ff:00:22:68:85:22:2e:08:00
Jan 12 14:52:58 node2 kernel: martian source 10.3.198.23 from 10.3.198.1, on dev eth1
Jan 12 14:52:58 node2 kernel: ll header: ff:ff:ff:ff:ff:ff:00:d0:f8:86:86:62:08:06
Jan 12 14:53:00 node2 kernel: printk:


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