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ÔÚ unix ºÍ linux Ï£¬½¨Òé´ó¼ÒʹÓà dig ÃüÁîÀ´´úÌæ nslookup¡£ dig ÃüÁîµÄ¹¦ÄÜ±È nslookup Ç¿´óºÜ¶à£¬²»Ïñ nslookkup »¹µÃ set À´ set È¥µÄ£¬¹ÖÂé·³µÄ¡£ÏÂÃæÊÇ dig µÄһЩ±È½Ï³£ÓõÄÃüÁî: 
¡¡¡¡# dig ×î»ù±¾µÄÓ÷¨ 
¡¡¡¡dig @server sina.com.cn.
¡¡¡¡# Óà dig ²é¿´ zone Êý¾Ý´«Êä
¡¡¡¡dig @server zx.xmgd.com. AXFR
¡¡¡¡# Óà dig ²é¿´ zone Êý¾ÝµÄÔöÁ¿´«Êä
¡¡¡¡dig @server zx.xmgd.com. IXFR=N
¡¡¡¡# Óà dig ²é¿´·´Ïò½âÎö
¡¡¡¡dig -x 210.52.83.228 @server
¡¡¡¡# ²éÕÒÒ»¸öÓòµÄÊÚȨ dns ·þÎñÆ÷
¡¡¡¡dig xmgd.com. +nssearch
¡¡¡¡# ´Ó¸ù·þÎñÆ÷¿ªÊ¼×·×ÙÒ»¸öÓòÃûµÄ½âÎö¹ý³Ì
¡¡¡¡dig xmgd.com +trace
¡¡¡¡# ²é¿´ÄãʹÓõÄÊÇÄĸö F root dns server 
¡¡¡¡dig +norec @F.ROOT-SERVERS.NET HOSTNAME.BIND CHAOS TXT


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iptables -D chain rule num[option]
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linuxÄں˶ÁÊé±Ê¼Ç£¨½ø³ÌÖÕÖ¹º¯Êý·ÖÎö£©Èý

do_exit() Function
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kernel/exit.c
707 NORET_TYPE void do_exit(long code)
708 {
709 struct task_struct *tsk = current;
710
711 if (unlikely(in_interrupt()))
712 panic("Aiee, killing interrupt handler!");
713 if ......

Linux Socketѧϰ±Ê¼Ç£¨1£© ѧϰĿ¼

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9. Ö÷»úºÍÍøÂçÃû²éѯ
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10. ÔÚSocketÉÏʹÓñê×¼I/O
11. ²¢·¢¿Í»§ºÍ·þÎñÆ÷
12. Sock ......

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