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2) ¼´Ê±ÉúЧ£¬ÖØÆôºó¸´Ô­
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-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT
-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT


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Linux/Unix Êý¾Ý¿â°²×°ÅäÖÃ

      ¸ù¾Ý¹¤×÷»·¾³µÄÐèÇó£¬ÐèÒªÕÆÎÕLinux/Unix»·¾³Ï½øÐÐÈí¼þ°²×°Î¬»¤ÒÔ¼°Ïà¹ØÅäÖõȼ¼ÄÜ¡£ÕâÀォÎÒµÄʹÓÃÐĵüǼÏÂÀ´¸ú´ó¼Ò·ÖÏíһϡ£ÒÔ°²×°Êý¾Ý¿âΪÀý½øÐн²½â(×¢£ºÒÔÉϰ²×°¾ùÒÔÔ´´úÂ뷽ʽ½øÐа²×°)¡£ÒÔÏÂʹÓõÄLinuxϵͳÊǰ²×°ÔÚÐéÄâ»úÉϵ쬲¢ÇÒlinuxϵͳÊÇlinux enterprise 5¡£
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linux ²Ù×÷

 
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1.     man vi
2.     echo $PATH
3.     catÏÔʾÎļþÄÚÈÝ
 1 cat ÎļþÃûÒ»ÎļþÃû¶þ
 2 moreÎļþÃû
 3 lessÎļþÃû Ïòǰ·­°´b¼ü;Ïòºó·­°´p¼ü;Ö¸¶¨Î»ÖÃÊäÈë°Ù·Ö±È;Í˳ö ......

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    vsftpd ÊÇºÍ Linux ϵͳÉÏÓû§¹ÜÀíÒ»ÑùµÄ¡£ËùÓеÄÓû§¹ÜÀí¶¼ÊÇÔÚÏÖÓÐËÞÖ÷ϵͳÉϵÄÓû§ÒÔ¼°×é¹ÜÀíÏàͬ¡£ÎļþȨÏÞÉϵĹÜÀíÒ²ÊÇºÍ Linux һģһÑù¡£ÔڴÉϱȽϿ죬¼òµ¥·½±ã¡£
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¡¡¡¡Linux×÷Ϊһ¸ö¶àÈÎÎñ»·¾³£¬ÔÊÐíÓû§Í¬Ê±Ö´ÐжàÏîÈÎÎñ£¬ÀýÈç²é¿´ÏµÍ³Çé¿ö¡¢±¸·Ý×ÊÁÏ¡¢±à¼­ÎļþºÍ´òÓ¡ÎļþµÈ¡£
¡¡¡¡¶ÔÓÚºÄʱ³¤µÄÈÎÎñ²»Ó¦¸ÃÈÃËüÔÚǰ̨ÈÎÎñÖÐÖ´ÐУ¬¶øÓ¦¸Ã½»¸øºǫ́ÈÎÎñÈ¥Ö´ÐС£ÕâÑùǰ̨ÈÎÎñ¿É¼ÌÐøÕý³£ÔË×÷ÆäËüµÄ²Ù×÷£¬²»Óõȴý¡£Ê¾ÀýÈçÏ£º
¡¡¡¡# find / -name testing &
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LinuxÉ϶ÔÄÚ´æÐ¹Â¶µÄ²âÊÔ

http://www.ibm.com/developerworks/cn/linux/l-cn-memleak/ ½éÉÜÁË»ù±¾µÄ²âÊÔÀàÐͺÍÔ­Àí
http://blog.csdn.net/rufeng18/archive/2008/11/17/3322099.aspx
http://www.ibm.com/developerworks/cn/linux/l-pow-debug/
http://xueyueming.blog.163.com/blog/static/60411785200981045547110/
http://zhangyafeikimi.java ......
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