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  Ê×ÏȽéÉÜһϠdiff ºÍ patch¡£ÔÚÕâÀï²»»á°Ñ man ÔÚÏßÎĵµÉÏËùÓеÄÑ¡Ïî¶¼½éÉÜÒ»ÏÂ,ÄÇÑùҲû
ÓбØÒª¡£ÔÚ 99%µÄʱ¼äÀï,ÎÒÃÇÖ»»áÓõ½¼¸¸öÑ¡Ïî¡£ËùÒÔ±ØÐëѧ»áÕ⼸¸öÑ¡Ïî¡£
1¡¢diff
--------------------
NAME
   diff - find differences between two files
SYNOPSIS
   diff [options] from-file to-file
--------------------
¼òµ¥µÄ˵,diff µÄ¹¦ÄܾÍÊÇÓÃÀ´±È½ÏÁ½¸öÎļþµÄ²»Í¬,È»ºó¼Ç¼ÏÂÀ´,Ò²¾ÍÊÇËùνµÄ diff ²¹¶¡¡£Óï·¨
¸ñʽ:diff ¡¾Ñ¡Ïî¡¿ Ô´Îļþ(¼Ð) Ä¿µÄÎļþ(¼Ð),¾ÍÊÇÒª¸øÔ´Îļþ(¼Ð)´ò¸ö²¹¶¡,ʹ֮±ä³ÉÄ¿
µÄÎļþ(¼Ð),ÊõÓïÒ²¾ÍÊÇ“Éý¼¶”¡£ÏÂÃæ½éÉÜÈý¸ö×îΪ³£ÓÃÑ¡Ïî:
-r ÊÇÒ»¸öµÝ¹éÑ¡Ïî,ÉèÖÃÁËÕâ¸öÑ¡Ïî,diff »á½«Á½¸ö²»Í¬°æ±¾Ô´´úÂëĿ¼ÖеÄËùÓжÔÓ¦ÎļþÈ«²¿¶¼½ø
ÐÐÒ»´Î±È½Ï,°üÀ¨×ÓĿ¼Îļþ¡£
-N Ñ¡ÏîÈ·±£²¹¶¡Îļþ½«ÕýÈ·µØ´¦ÀíÒѾ­´´½¨»òɾ³ýÎļþµÄÇé¿ö¡£
-u Ñ¡ÏîÒÔͳһ¸ñʽ´´½¨²¹¶¡Îļþ,ÕâÖÖ¸ñʽ±Èȱʡ¸ñʽ¸ü½ô´ÕЩ¡£
2¡¢patch
------------------
NAME
     patch - apply a diff file to an original
SYNOPSIS
     patch [options] [originalfile [patchfile]]
     but usually just
     patch -pnum <patchfile>
------------------
¼òµ¥µÄ˵,patch ¾ÍÊÇÀûÓà diff ÖÆ×÷µÄ²¹¶¡À´ÊµÏÖÔ´Îļþ(¼Ð)ºÍÄ¿µÄÎļþ(¼Ð)µÄת»»¡£ÕâÑù˵
¾ÍÒâζ×ÅÄã¿ÉÒÔÓÐÔ´Îļþ(¼Ð)¨D¨D>Ä¿µÄÎļþ(¼Ð),Ò²¿ÉÒÔÄ¿µÄÎļþ(¼Ð)¨D¨D>Ô´Îļþ(¼Ð)¡£
ÏÂÃæ½éÉܼ¸¸ö×î³£ÓÃÑ¡Ïî:
-p0 Ñ¡ÏîÒª´Óµ±Ç°Ä¿Â¼²éÕÒÄ¿µÄÎļþ(¼Ð)
-p1 Ñ¡ÏîÒªºöÂÔµôµÚÒ»²ãĿ¼,´Óµ±Ç°Ä¿Â¼¿ªÊ¼²éÕÒ¡£
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ÔÚÕâÀïÒÔʵÀý˵Ã÷:
--- old/modules/pcitable         Mon Sep 27 11:03:56 1999
+++ new/modules/pcitable           Tue Dec 19 20:05:41 2000
   Èç¹ûʹÓòÎÊý-p0,ÄǾͱíʾ´Óµ±Ç°Ä¿Â¼ÕÒÒ»¸ö½Ð×ö old µÄÎļþ¼Ð,ÔÚËüÏÂÃæÑ°ÕÒ modules ϵÄ
pcitable ÎļþÀ´Ö´ÐÐ patch ²Ù×÷¡£
   Èç¹ûʹÓòÎÊý-p1,ÄǾͱíʾºöÂÔµÚÒ»²ãĿ¼(¼´²»¹Ü old),´Óµ±Ç°Ä¿Â¼Ñ°ÕÒ modules µÄÎļþ
¼Ð,ÔÚËüÏÂÃæÕÒ pcitable¡£ÕâÑùµÄǰÌáÊǵ±Ç°Ä¿ ¼±ØÐëΪ modules ËùÔÚµÄĿ¼¡£¶ø diff ²¹¶


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LinuxºÚ¿Í´óÆØ¹âÍÆ¼ö¹¤¾ß

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1.sXid  http://os.51cto.com/art/200907/134874.htm
ÏÂÔØµØÖ·:http://freshmeat.net/projects/sxid/
2. LSAT
ÏÂÔØµØÖ·:http://usat.sourceforge.net/
3.portsentry
ÏÂÔØµØÖ·:http://sourceforge.net/projects/sentrytools/
4. fail2ban
http://www.fail2ban.org/
5.lids
http://www.lids.org/
¶þ ......

(Ò»)LinuxÍøÂç±à³Ì

http://blog.csdn.net/jenshy/archive/2006/04/18/667944.aspx
(Ò»)LinuxÍøÂç±à³Ì--ÍøÂç֪ʶ½éÉÜ
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ϵͳ£ºfedora core 5
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/* server */
#include <stdio.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <netdb.h>
#include <unistd.h>
#include <string.h>
#inclu ......
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