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     /etc/hosts É趨Óû§×ÔÒѵÄIPÓëÃû×ֵĶÔÓ¦±í
     /etc/hosts.allow ÉèÖÃÔÊÐíʹÓÃinetdµÄ»úÆ÷ʹÓÃ
     /etc/hosts.deny ÉèÖò»ÔÊÐíʹÓÃinetdµÄ»úÆ÷ʹÓÃ
     /etc/hosts.equiv ÉèÖÃÔ¶¶Ë»ú²»ÓÃÃÜÂë
     /etc/inetd.conf Éè¶¨ÏµÍ³ÍøÂçÊØ»¤½ø³ÌinetdµÄÅäÖÃ
     /etc/gateways É趨·ÓÉÆ÷
     /etc/protocols É趨ϵͳ֧³ÖµÄЭÒé
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Service Discovery Protocol(SDP)ÌṩһÖÖÄÜÁ¦£¬ÈÃÓ¦ÓóÌÐòÓз½·¨·¢ÏÖÄÄÖÖ·þÎñ¿ÉÓÃÒÔ¼°ÕâÖÖ·þÎñµÄÌØÐÔ¡£
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LinuxÊÇÒ»¸ö¿É¿¿ÐԷdz£¸ßµÄ²Ù×÷ϵͳ£¬µ«ÊÇËùÓÐÓùýLinuxµÄÅóÓѶ¼»á¸Ð¾õµ½£¬LinuxºÍWindowsÕâÑùµÄ"ɵ¹Ï"²Ù×÷ϵͳ£¨ÕâÀïË¿ºÁûÓбáµÍWindowsµÄÒâ˼£¬Ïà·´ÕâÓ¦¸ÃÊÇWindowsµÄÓŵ㣩Ïà±È£¬ºóÕßÎÞÒÉÔÚÒײÙ×÷ÐÔÉϸüʤһ³ï¡£µ«ÊÇΪʲôÓÖÓÐÄÇô¶àµÄ°®ºÃÕßÖ ......

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int Daemon(char* szExecName = NULL)
{
 int res = 0;
 pid_t pc;
 pc = fork();
 if(pc < 0)
 {
  fprintf(stderr,"ERROR_Deamon()_fork(): failed!");
  return -1;
 }
 else if(pc == 0) //sub process
 {
 }
 else if( ......
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