\u505a\u4e3a\u4e00\u4e2a\u8fd0\u7ef4\u5de5\u7a0b\u5e08\uff0c\u4f60\u5fc5\u987b\u638c\u63e1\u6700\u57fa\u672c\u7684\u6280\u80fd\u65b9\u80fd\u80dc\u4efb\u8fd9\u4efd\u5de5\u4f5c\uff0c\u5426\u5219\uff0c\u662f\u6ca1\u6709\u516c\u53f8\u613f\u610f\u63a5\u7eb3\u4f60\uff0c\u5e76\u7ee7\u7eed\u57f9\u517b\u4f60\u3002<\/p>\n

1. \u72ec\u7acb\u5b89\u88c5\u7cfb\u7edf\u4e0e\u8f6f\u4ef6<\/strong><\/div>\n
\u5728\u5b89\u88c5\u7cfb\u7edf\u65f6\u4f60\u66f4\u4f1a\u53bb\u7559\u5fc3\u5b66\u4e60Linux\u7684\u76ee\u5f55\u7ed3\u6784\u548c\u4f5c\u7528\uff0c\u5b66\u4f1a\u7cfb\u7edf\u7684\u5b89\u88c5\u65b9\u6cd5\u548c\u8f6f\u4ef6\u5b89\u88c5\u65b9\u5f0f\uff0c\u5bf9\u76ee\u5f55\u4e0e\u6587\u4ef6\u7684\u64cd\u4f5c\uff0c\u5443\uff0c\u8fd9\u4e9b\u591f\u57fa\u7840\u5417\uff1f<\/p>\n
2. \u9009\u62e9\u4e00\u672c\u9002\u5408\u81ea\u5df1\u7684\u4e66\u7c4d<\/strong><\/div>\n
\u5b66\u4e60Linux\u9664\u4e86\u7f51\u4e0a\u514d\u8d39\u7684\u89c6\u9891\u6559\u7a0b\u4e4b\u5916\uff0c\u8fd8\u662f\u8981\u591a\u770b\u4e66\uff0c\u591a\u7406\u89e3\u3001\u601d\u8003\uff0c\u5c06\u4f60\u4e0d\u4f1a\u3001\u4e0d\u61c2\u7684\u505a\u597d\u7b14\u8bb0\uff0c\u597d\u8bb0\u6027\u4e0d\u5982\u70c2\u7b14\u5934\u3002\u9009\u62e9\u4e00\u672c\u9002\u5408\u81ea\u5df1\u7684\u4e66\u7c4d\uff0c\u6709\u4eba\u8bf4\u300aLinux\u5c31\u8be5\u8fd9\u4e48\u5b66\u300b\u592a\u626f\u3001\u5185\u5bb9\u592a\u7b80\u5355\uff0c\u800c\u6211\u770b\u7740\u8fd9\u672c\u4e66\u5374\u975e\u5e38\u9002\u5408\u6211\u81ea\u5df1\uff0c\u81ea\u5df1\u770b\u5176\u5b83\u4e66\u7c4d\u611f\u89c9\u770b\u4e0d\u61c2\uff0c\u5c31\u6254\u90a3\u91cc\u4e0d\u5728\u613f\u610f\u53bb\u770b\uff0c\u9002\u5408\u81ea\u5df1\u7684\u5c31\u662f\u6700\u597d\u7684\u4e66\uff0c\u53ea\u6709\u5165\u95e8\u4e86\u624d\u80fd\u66f4\u597d\u7684\u5f80\u4e0b\u9762\u5b66\u4e60\uff0c\u5408\u683c\u7684\u5de5\u7a0b\u5e08\u66f4\u8981\u5b66\u4f1a\u81ea\u5b66\u3002<\/p>\n
$\"\"$ <\/p>\n
3. \u7ba1\u7406\u7528\u6237<\/strong><\/div>\n
Linux\u662f\u4e00\u4e2a\u591a\u7528\u6237\u3001\u591a\u4efb\u52a1\u7684\u64cd\u4f5c\u7cfb\u7edf\uff0c\u5141\u8bb8\u8bb8\u591a\u7528\u6237\u540c\u65f6\u4f7f\u7528\u8fd9\u4e2a\u673a\u5668\u5904\u7406\u591a\u4e2a\u4efb\u52a1\uff0c\u5fc5\u987b\u7ba1\u7406\u597d\u8fd9\u4e9b\u7528\u6237\uff0c\u5373\u4f7f\u521d\u5b66Linux\u7684\u5c0f\u767d\u4e5f\u77e5\u9053\uff0c\u53ef\u4ee5\u901a\u8fc7\u7f51\u7edc\u8ba9\u591a\u4eba\u540c\u65f6\u767b\u5f55\uff0c\u800c\u975e\u4f7f\u7528\u673a\u5668\u4e0a\u4ec5\u6709\u7684\u4e00\u4e2a\u663e\u793a\u5668\u3001\u4e00\u4e2a\u952e\u76d8\u548c\u9f20\u6807\u3002\u6bd4\u5982 web\u670d\u52a1\u5668\uff0c\u662f\u4e0d\u662f\u591a\u7528\u6237\uff1fftp\u670d\u52a1\u5668\u4e5f\u662f\u591a\u7528\u6237\u3002\u7cfb\u7edf\u4e0a\u53ef\u4ee5\u5f00\u542f\u8fdc\u7a0b\u767b\u5f55ssh \u6216\u8005telnet\uff0c\u8fd9\u6837\u51e0\u4e2a\u4eba\u540c\u65f6\u767b\u5f55\u5230\u8be5Linux\u7cfb\u7edf\u4e0a\u9762\u3002\u800c\u9700\u8981\u7ba1\u7406\u597d\u6bcf\u4e2a\u670d\u52a1\u540e\u9762\u7684\u5e10\u53f7\uff08\u7528\u6237\uff09\uff0c \u53ef\u4ee5\u5b89\u5168\u3001\u5408\u7406\u4f7f\u7528Linux\u7cfb\u7edf\u8d44\u6e90\u3002<\/p>\n
4. \u78c1\u76d8\u7684\u5408\u7406\u7ba1\u7406<\/strong><\/div>\n
\u505a\u4e86\u8fd0\u7ef4\u624d\u77e5\u9053\u78c1\u76d8\u4e0d\u662f\u6700\u503c\u94b1\uff0c\u800c\u6570\u636e\u624d\u662f\u65e0\u4ef7\u7684\u3002\u5f80\u5f80\u78c1\u76d8\u7684\u7a7a\u95f4\u662f\u6709\u5927\u5c0f\u7684\uff0c\u6839\u636e\u4e1a\u52a1\u9700\u6c42\u5408\u7406\u5206\u914d\u78c1\u76d8\u53d8\u7684\u975e\u5e38\u91cd\u8981\uff0c\u6211\u5355\u4f4d\u7684\u670d\u52a1\u5668swap\u4e3a66G\u4f7f\u75281G\uff0c\u800c\/var\u7a7a\u95f4\u4e3a36G\u603b\u662f\u78c1\u76d8\u6ee1\u6ee1\uff0c\u4e0d\u5f97\u4e0d\u9891\u7e41\u5220\u9664\u4ea7\u751f\u7684\u65e5\u5fd7\uff0c\u4ee5\u7a7a\u51fa\u7a7a\u95f4\uff0c\u5426\u5219\u5c31\u4f1a\u5f71\u54cd\u4e1a\u52a1\u7684\u6b63\u5e38\u4f7f\u7528\u3002\u771f\u662f\u8840\u7684\u6559\u8bad\uff0c\u6709\u90a3\u4e48\u591a\u7a7a\u95f4\u5374\u4e0d\u80fd\u62ff\u6765\u4f7f\u7528\uff0c\u800c\u4e1a\u52a1\u5fc5\u987b24\u5c0f\u65f6*365\u5de5\u4f5c\u3002\u7ecf\u5e38\u67e5\u770b\u78c1\u76d8\u5229\u7528\u7387\uff0c\u67e5\u770b\u76ee\u5f55\u5927\u5c0f\u548c\u6587\u4ef6\u5927\u5c0f\uff0c\u4e3a\u5728\u7528\u6216\u8005\u65b0\u6269\u5bb9\u7684\u78c1\u76d8\u505a\u4e00\u4e2a\u66f4\u597d\u7684\u89c4\u5212\u3002<\/p>\n
5. \u67e5\u770b\u7cfb\u7edf\u5065\u5eb7\u72b6\u6001<\/strong><\/div>\n
\u7ecf\u5e38\u6709\u4eba\u95ee\u6211\u7684Linux\u7cfb\u7edf\u600e\u4e48\u53d8\u7684\u8fd9\u4e48\u6162\uff1f\u91cd\u542f\u4e5f\u53d8\u6162\u4e86\uff1f\u91cd\u542f\u6162\u53ef\u80fd\u662f\u4f60\u52a0\u8f7d\u7684\u7a0b\u5e8f\u591a\uff0c\u4e5f\u53ef\u80fd\u78c1\u76d8\u6709\u574f\u9053\uff0c\u90fd\u9700\u8981\u4f60\u6765\u68c0\u6d4b\uff0c\u7cfb\u7edf\u53d8\u6162\uff0c\u6709\u53ef\u80fd\u8fd0\u884c\u7684\u7a0b\u5e8f\u5360\u6ee1\u5185\u5b58\uff0c\u6216\u8005CPU\u8dd1\u6162\uff0c\u7f51\u7edc\u5229\u7528\u7387\u5360\u6ee1\uff0c\u5de5\u7a0b\u5e08\u62ff\u8d77\u4f60\u7684\u547d\u4ee4top \u3001sar \u3001 netstat\u3001ps\u7b49\uff0c\u67e5\u770b\u662f\u4ec0\u4e48\u539f\u56e0\u5f15\u8d77\u7684\u3002\u6211\u4eec\u7684RHEL 6.8\u670d\u52a1\u5668\u591a\u6b21\u53d1\u73b0\u767b\u5f55\u7cfb\u7edf\u6536\u3001\u5361\uff0c\u6709\u4e00\u4e2aCPU\u4f7f\u7528\u7387\u8d85100%\uff0c\u8fdb\u7a0b\u6740\u6b7b\u5c31\u53ef\u4ee5\u6062\u590d\uff0c\u662f\u4e00\u4e2a\u6728\u9a6c\uff0c\u53ef\u662f\u6ca1\u8fc7\u591a\u4e45\u7cfb\u7edf\u6302\u4e86\uff0c\u7cfb\u7edf\u63d0\u793a\u7f34\u7eb32\u4e2a\u6bd4\u7279\u5e01\uff0c\u5443\u4e0d\u591a\u8bf4\u4e86\u3002<\/p>\n
6. \u5b89\u5168\u548c\u5907\u4efd<\/strong><\/div>\n
\u5bf9\u4e8e\u751f\u4ea7\u73af\u5883\u7684\u7cfb\u7edf\uff0c\u771f\u662f\u5b89\u5168\u592a\u91cd\u8981\u4e86\u3002\u6bd4\u7279\u5e01\u51b0\u6bd2\u51fa\u73b0\u540e\uff0c\u6700\u540e\u7684\u89e3\u51b3\u65b9\u6cd5\u662f\u91cd\u65b0\u5b89\u88c5\u7cfb\u7edf\uff0c\u4f46\u5907\u4efd\u8fd8\u662f1\u4e2a\u534a\u6708\u4e4b\u524d\u7684\u6570\u636e\uff0c\u65e0\u8bba\u600e\u4e48\u6837\u8fd8\u662f\u6709\u5907\u4efd\uff0c\u60e8\uff01\uff01\uff01\u56e0\u6b64\u53d1\u73b0\u5b89\u5168\u95ee\u9898\uff0c\u5e94\u9996\u5148\u505c\u6b62\u76f8\u5e94\u7684\u670d\u52a1\uff0c\u67e5\u770b\u65e5\u5fd7\uff0c\u6267\u884c\u5907\u4efd\u3002Linux\u7cfb\u7edf\u867d\u7136\u8bf4\u5b89\u5168\uff0c\u4f46\u4e5f\u4e0d\u662f\u767e\u5206\u767e\uff0c\u53ca\u65f6\u6253\u8865\u4e01\uff0c\u6bcf\u5929\u8fdb\u884c\u65e5\u5e38\u5907\u4efd\u8fd8\u662f\u6781\u4e3a\u5fc5\u8981\u3001\u91cd\u8981\uff0c\u5907\u4efd\u540c\u65f6\u5b58\u653e\u5728\u591a\u4e2a\u5730\u65b9\uff0cU\u76d8\u3001\u7f51\u7edc\u4e0a\u9762\u5176\u5b83\u7684\u8ba1\u7b97\u673a\u4e0a\u3002\u4f60\u505a\u5230\u4e86\u5417\uff1f\u4e0d\u7136\u603b\u6709\u54ed\u7684\u4e00\u5929\uff0c\u60b2\u5267\u554a\uff0c\u771f\u662f\u4e0d\u77e5\u9053\u8be5\u5982\u4f55\u5411\u7528\u6237\u89e3\u91ca\u3002\u53ea\u6709\u6700\u65b0\u7684\u6570\u636e\u5907\u4efd\uff0c\u5373\u4f7f\u7cfb\u7edf\u51fa\u73b0\u95ee\u9898\uff0c\u4e5f\u53ef\u4ee5\u5c06\u4e1a\u52a1\u6062\u590d\u5230\u6700\u65b0\u7684\u72b6\u6001\uff0c\u964d\u4f4e\u6700\u5c0f\u7684\u635f\u5931\u3002\u5b89\u5168\u548c\u5907\u4efd\uff0c\u6211\u4e0d\u662f\u4e00\u4e2a\u9002\u5408\u7684\u7ba1\u7406\u5458\u3002\u3002\u3002<\/p>\n
7. \u7f51\u7edc\u670d\u52a1<\/strong><\/div>\n
\u6570\u4ee5\u767e\u4e07\u53f0\u7684Linux\u670d\u52a1\u5668\u627f\u8f7d\u7740\u4e92\u8054\u7f51\u7684\u7e41\u8363\uff0c\u4e0a\u7f51\u770b\u65b0\u95fb\u3001\u89c6\u9891\u7684Web\u670d\u52a1\uff0c\u4e0b\u8f7d\u6587\u4ef6\u7684ftp\u670d\u52a1\uff0c\u90ae\u4ef6\u7684Sendmail\uff0cDNS\u57df\u540d\u7684Bind\u57df\u540d\u89e3\u6790\u670d\u52a1\uff0cSquid\u4ee3\u7406\u670d\u52a1\uff0cMariaDB\u6570\u636e\u5e93\u4e1a\u52a1\u2026\u2026\uff0c\u5404\u79cd\u670d\u52a1\u7684\u4f7f\u7528\u65b9\u6cd5\uff0c\u4f60\u90fd\u5f97\u4f1a\uff0c\u662f\u4e0d\u662f\u597d\u53ef\u601c\u554a\u3002\u6211\u4eec\u5185\u90e8\u9700\u8981\u642d\u5efa\u4e00\u4e2aLinux\u7684\u6d41\u5a92\u4f53\u670d\u52a1\uff08\u89c6\u9891\u670d\u52a1\u5668\uff09\u548cVPN\u4e1a\u52a1\uff0c\u6b63\u5728\u642d\u5efa\u4e2d\uff0c\u5176\u5b9e\u90fd\u5f88\u597d\u73a9\u3001\u6709\u610f\u601d\u3002\u5f53\u4f60\u505a\u5b8c\u8fd9\u4e9b\uff0c\u4e00\u5b9a\u4f1a\u611f\u89c9\u5230\u975e\u5e38\u6709\u6210\u5c31\u611f\u7684\u3002<\/p>\n
8. \u7cfb\u7edf\u7ba1\u7406\u548c\u65e5\u5fd7\u5206\u6790<\/strong><\/div>\n
\u5c06\u7528\u6237\u7ba1\u7406\u3001\u78c1\u76d8\u7ba1\u7406\u3001\u7f51\u7edc\u670d\u52a1\u5408\u7406\u4f7f\u7528\u548c\u4f18\u5316\u7cfb\u7edf\uff0c\u5c06\u4e00\u4e9b\u4e0d\u9700\u8981\u7684\u4e1a\u52a1kill\u6389\uff0cLinux\u7cfb\u7edf\u4e2d\u901a\u77e5\u8fd0\u884c\u7740\u975e\u5e38\u591a\u7684\u8fdb\u7a0b\uff0c\u4f46\u662fCPU\u5728\u7edf\u4e00\u65f6\u949f\u5468\u671f\u5185\u53ea\u80fd\u8fd0\u7b97\u4e00\u4e2a\u6307\u4ee4\uff0c\u8fdb\u7a0b\u4f18\u5148\u7ea7\u51b3\u5b9a\u4e86\u6bcf\u4e2a\u8fdb\u7a0b\u5904\u7406\u7684\u5148\u540e\u987a\u5e8f\uff0c\u4f18\u5316\u8fdb\u7a0b\u7684\u4f18\u5148\u7ea7\uff0c\u63d0\u5347\u670d\u52a1\u6548\u7387\u3002\u7cfb\u7edf\u5b9a\u65f6\u4efb\u52a1crontab\u5408\u7406\u5229\u7528\uff0c\u63d0\u9ad8\u5de5\u4f5c\u6548\u7387\u3002\u7a0b\u5e8f\u5e76\u4e0d\u603b\u662f\u4e00\u76f4\u6b63\u5e38\u8fd0\u884c\uff0c\u51fa\u73b0\u7684\u6545\u969c\u603b\u4f1a\u6709\u4e00\u4e2alog\u65e5\u5fd7\uff0c\u67e5\u770b\u65e5\u5fd7\u5206\u6790\u6545\u969c\u539f\u56e0\uff0c\u53d8\u7684\u540c\u6837\u91cd\u8981\u3002\u6bd4\u5982\u9047\u5230\u7684\u5404\u79cd\u6076\u610f\u653b\u51fb\u884c\u4e3a\uff0c\u6bd4\u8f83\u5e38\u89c1\u7684\u4fbf\u662fHTTP flood\uff0c\u4e5f\u79f0\u4e4b\u4e3aCC\u653b\u51fb\u3002\u5982\u4f55\u5feb\u901f\u7684\u5b9a\u4f4d\u5230\u653b\u51fb\uff0c\u5e76\u8fc5\u901f\u54cd\u5e94\uff0c\u6210\u4e3a\u8fd0\u7ef4\u4eba\u5458\u5fc5\u5907\u7684\u6280\u80fd\u3002\u67e5\u627e\u3001\u5b9a\u4f4d\u6545\u969c\u6700\u5feb\u7684\u65b9\u6cd5\u5c31\u662f\u767b\u9646\u5230\u76f8\u5e94\u7684\u5e94\u7528\uff0c\u67e5\u770b\u76f8\u5e94\u7684\u653b\u51fb\u6765\u6e90\u3001log\u65e5\u5fd7\u53ca\u65f6\u8fdb\u884c\u5904\u7406\u3002<\/p>\n
\n
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