{"id":100226,"date":"2026-09-04T07:34:07","date_gmt":"2026-09-03T23:34:07","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/100226.html"},"modified":"2026-09-04T07:34:07","modified_gmt":"2026-09-03T23:34:07","slug":"relinux-%e7%b3%bb%e7%bb%9f%e7%af%87%ef%bc%88%e5%8d%81%e4%b8%83%ef%bc%89%ef%bc%9a%e8%bf%9b%e7%a8%8b%e7%af%87%ef%bc%88%e5%85%ad%ef%bc%89%ef%bc%9a%e7%8e%af%e5%a2%83%e5%8f%98%e9%87%8f%e6%b7%b1%e5%ba%a6","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/100226.html","title":{"rendered":"Re:Linux \u7cfb\u7edf\u7bc7\uff08\u5341\u4e03\uff09\uff1a\u8fdb\u7a0b\u7bc7\uff08\u516d\uff09\uff1a\u73af\u5883\u53d8\u91cf\u6df1\u5ea6\u89e3\u6790\uff5c\u547d\u4ee4\u884c\u53c2\u6570\u3001\u73af\u5883\u53d8\u91cf\u8868\u30014 \u79cd\u83b7\u53d6\u65b9\u5f0f\u4e0e\u7ee7\u627f\u673a\u5236\u4e07\u5b57\u8be6\u89e3"},"content":{"rendered":"

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

\u4e0a\u4e00\u7bc7\u6211\u4eec\u8bb2\u5b8c\u4e86 Linux O (1) \u8c03\u5ea6\u7b97\u6cd5，\u641e\u61c2\u4e86\u8fdb\u7a0b\u5982\u4f55\u88ab\u8c03\u5ea6\u4e0a CPU \u8fd0\u884c\u3002
\n\u4f46\u4e00\u4e2a\u8fdb\u7a0b\u542f\u52a8\u4e4b\u540e，\u9664\u4e86\u81ea\u5df1\u7684\u4ee3\u7801\u3001\u6570\u636e，\u64cd\u4f5c\u7cfb\u7edf\u8fd8\u4f1a\u7ed9\u5b83\u9644\u5e26\u4e24\u4efd \u201c\u968f\u8eab\u8d44\u6599\u201d：\u547d\u4ee4\u884c\u53c2\u6570 \u548c \u73af\u5883\u53d8\u91cf\u3002
\n\u5f88\u591a\u4eba\u5929\u5929\u6572\u547d\u4ee4，gcc\u3001g++\u3001sudo\u3001su，\u5374\u5f88\u5c11\u601d\u8003：
\n\u4e3a\u4ec0\u4e48 gcc \u53ef\u4ee5\u81ea\u52a8\u627e\u5230\u7cfb\u7edf\u7684\u5e93\u6587\u4ef6？\u4e3a\u4ec0\u4e48 shell \u53ef\u4ee5\u5728 PATH \u91cc\u9762\u641c\u7d22\u547d\u4ee4？\u4e3a\u4ec0\u4e48\u5b50\u8fdb\u7a0b\u53ef\u4ee5\u62ff\u5230\u7236\u8fdb\u7a0b\u7684\u73af\u5883\u4fe1\u606f？
\n\u672c\u7bc7\u6211\u4eec\u4ece main \u51fd\u6570\u8bb2\u8d77，\u9010\u5c42\u62c6\u89e3\u547d\u4ee4\u884c\u53c2\u6570\u3001\u73af\u5883\u53d8\u91cf\u5e95\u5c42\u7ed3\u6784\u30014 \u79cd\u4ee3\u7801\u83b7\u53d6\u65b9\u5f0f\u3001\u7ee7\u627f\u539f\u7406，\u540c\u65f6\u8bb2\u73af\u5883\u53d8\u91cf\u7684\u5b89\u5168\u8fb9\u754c\u3002<\/p>\n

\n

\u524d\u8a00：\u547d\u4ee4\u884c\u53c2\u6570<\/h3>\n

1.1 \u91cd\u65b0\u8ba4\u8bc6 main \u51fd\u6570<\/h4>\n

\u5f88\u591a C\/C++ \u521d\u5b66\u8005\u4ee5\u4e3a，main()\u5c31\u662f\u7a0b\u5e8f\u7684\u771f\u6b63\u5165\u53e3，\u5176\u5b9e\u4e0d\u662f\u3002<\/p>\n

1.1.1 main \u51fd\u6570\u4e0d\u662f\u7a0b\u5e8f\u7684\u5f00\u59cb<\/h5>\n

\u771f\u6b63\u7684\u7a0b\u5e8f\u5165\u53e3\u662f_start\u51fd\u6570，\u8fd9\u4e2a\u51fd\u6570\u5c5e\u4e8e C \u8fd0\u884c\u65f6\u5e93（crt0）\u3002
\n\u5f53\u64cd\u4f5c\u7cfb\u7edf\u628a\u7a0b\u5e8f\u52a0\u8f7d\u8fdb\u5185\u5b58，CPU \u8df3\u8f6c\u5230_start\u6267\u884c：<\/p>\n

  • \u505a\u7a0b\u5e8f\u8fd0\u884c\u524d\u7684\u521d\u59cb\u5316\u5de5\u4f5c（\u6808\u3001\u6807\u51c6 IO\u3001\u5168\u5c40\u53d8\u91cf\u521d\u59cb\u5316）<\/li>\n
  • \u89e3\u6790\u547d\u4ee4\u884c\u53c2\u6570\u3001\u89e3\u6790\u73af\u5883\u53d8\u91cf\u8868<\/li>\n
  • \u8c03\u7528\u6211\u4eec\u5199\u7684main()\u51fd\u6570<\/li>\n
  • main \u8fd4\u56de\u540e，_start\u8c03\u7528exit()\u5b8c\u6210\u8fdb\u7a0b\u9000\u51fa\u56de\u6536<\/li>\n

    main \u53ea\u662f\u6211\u4eec\u5199\u4e1a\u52a1\u903b\u8f91\u7684\u5165\u53e3，\u4e0d\u662f\u6574\u4e2a\u7a0b\u5e8f\u7684\u5e95\u5c42\u5165\u53e3\u3002<\/p>\n

    1.1.2 main \u51fd\u6570\u4e5f\u6709\u53c2\u6570<\/h5>\n

    \u6211\u4eec\u5e73\u65f6\u5199\u7684 main \u6709\u4e24\u79cd\u5199\u6cd5：<\/p>\n

    \/\/ \u5199\u6cd51，\u4e0d\u63a5\u6536\u53c2\u6570<\/span>
    \nint<\/span> main<\/span>(<\/span>)<\/span><\/p>\n

    \/\/ \u5199\u6cd52，\u63a5\u6536\u547d\u4ee4\u884c\u53c2\u6570，argc + argv<\/span>
    \nint<\/span> main<\/span>(<\/span>int<\/span> argc,<\/span> char<\/span> *<\/span>argv[<\/span>]<\/span>)<\/span><\/p>\n

      \n
    • argc（argument count）：\u547d\u4ee4\u884c\u53c2\u6570\u7684\u4e2a\u6570<\/li>\n
    • argv（argument vector）：\u5b57\u7b26\u4e32\u6307\u9488\u6570\u7ec4，\u4fdd\u5b58\u6bcf\u4e00\u4e2a\u547d\u4ee4\u884c\u5b57\u7b26\u4e32，\u6570\u7ec4\u672b\u5c3e\u4ee5NULL\u6807\u8bb0\u7ed3\u675f\u3002<\/li>\n<\/ul>\n

      \u793a\u4f8b\u4ee3\u7801：<\/p>\n

      \/\/ arg_demo.c<\/span>
      \n#<\/span>include<\/span> <stdio.h><\/span><\/span>
      \nint<\/span> main<\/span>(<\/span>int<\/span> argc,<\/span> char<\/span> *<\/span>argv[<\/span>]<\/span>)<\/span>
      \n{<\/span>
      \n printf<\/span>(<\/span>"argc = %d\\\\n"<\/span>,<\/span> argc)<\/span>;<\/span>
      \n for<\/span>(<\/span>int<\/span> i =<\/span> 0<\/span>;<\/span> i <<\/span> argc;<\/span> i++<\/span>)<\/span>
      \n {<\/span>
      \n printf<\/span>(<\/span>"argv[%d] = %s\\\\n"<\/span>,<\/span> i,<\/span> argv[<\/span>i]<\/span>)<\/span>;<\/span>
      \n }<\/span>
      \n return<\/span> 0<\/span>;<\/span>
      \n}<\/span><\/p>\n

      \u7f16\u8bd1\u8fd0\u884c：<\/p>\n

      gcc arg_demo.c -o<\/span> arg_demo
      \n.\/arg_demo hello linux 123<\/span><\/p>\n

      \u8f93\u51fa：<\/p>\n

      argc =<\/span> 4<\/span>
      \nargv[<\/span>0<\/span>]<\/span> =<\/span> .\/arg_demo
      \nargv[<\/span>1<\/span>]<\/span> =<\/span> hello
      \nargv[<\/span>2<\/span>]<\/span> =<\/span> linux
      \nargv[<\/span>3<\/span>]<\/span> =<\/span> 123<\/span><\/p>\n

      \u6ce8\u610f：argv[0]\u6c38\u8fdc\u662f\u7a0b\u5e8f\u81ea\u8eab\u7684\u540d\u5b57\u3002<\/p>\n

      1.2 \u547d\u4ee4\u884c\u53c2\u6570\u7684\u5207\u5206\u4e0e\u8868\u7ed3\u6784<\/h4>\n

      shell \u5728\u6572\u56de\u8f66\u6267\u884c\u547d\u4ee4\u7684\u65f6\u5019，\u4f1a\u505a\u4e00\u4ef6\u4e8b：\u628a\u4f60\u8f93\u5165\u7684\u6574\u884c\u5b57\u7b26\u4e32，\u6309\u7a7a\u683c\u5207\u5206\u6210\u4e00\u4e2a\u4e2a\u5b57\u7b26\u4e32，\u7ec4\u88c5\u6210argv\u6570\u7ec4\u3002
      \n\u5185\u5b58\u5e03\u5c40：<\/p>\n

      argv[<\/span>0<\/span>]<\/span> \u2192 ".\/arg_demo"<\/span>
      \nargv[<\/span>1<\/span>]<\/span> \u2192 "hello"<\/span>
      \nargv[<\/span>2<\/span>]<\/span> \u2192 "linux"<\/span>
      \nargv[<\/span>3<\/span>]<\/span> \u2192 "123"<\/span>
      \nargv[<\/span>4<\/span>]<\/span> \u2192 NULL<\/p>\n

      \u8fd9\u4e2a\u6570\u7ec4，\u5b58\u653e\u5728\u8fdb\u7a0b\u7528\u6237\u5730\u5740\u7a7a\u95f4\u7684\u6808\u533a\u9ad8\u5730\u5740，\u548c\u73af\u5883\u53d8\u91cf\u6328\u5728\u4e00\u8d77\u3002<\/p>\n

      1.3 \u547d\u4ee4\u884c\u53c2\u6570\u7684\u5e94\u7528\u6f14\u793a<\/h4>\n

      \u547d\u4ee4\u884c\u53c2\u6570\u6700\u5178\u578b\u7684\u7528\u9014：\u7a0b\u5e8f\u4e0d\u7528\u91cd\u65b0\u7f16\u8bd1，\u542f\u52a8\u7684\u65f6\u5019\u4f20\u53c2\u6570\u6539\u53d8\u884c\u4e3a\u3002
      \n\u6bd4\u5982ls -l，gcc -o test test.c，-l\u3001-o test test.c\u5168\u90e8\u90fd\u662f\u547d\u4ee4\u884c\u53c2\u6570\u3002<\/p>\n

      \n

      \u4e00\u3001\u5f15\u5165\u73af\u5883\u53d8\u91cf<\/h3>\n

      1.1 \u57fa\u672c\u6982\u5ff5<\/h4>\n

      1.1.1 \u73af\u5883\u53d8\u91cf\u7684\u6982\u5ff5<\/h5>\n

      \u73af\u5883\u53d8\u91cf\u5c31\u662f\u64cd\u4f5c\u7cfb\u7edf\u63d0\u4f9b\u7ed9\u8fdb\u7a0b\u7684\u4e00\u7ec4\u7279\u6b8a\u5168\u5c40\u53d8\u91cf，\u7528\u6765\u8bb0\u5f55\u7cfb\u7edf\u548c\u7528\u6237\u7684\u8fd0\u884c\u4fe1\u606f\u3002<\/p>\n

      \u5c31\u50cf\u4eba\u51fa\u95e8\u4f1a\u968f\u8eab\u5e26\u8bc1\u4ef6\u3001\u901a\u8baf\u5f55，\u8fdb\u7a0b\u542f\u52a8\u7684\u65f6\u5019，\u64cd\u4f5c\u7cfb\u7edf\u4e5f\u4f1a\u7ed9\u5b83\u9644\u5e26\u4e00\u6574\u5957\u73af\u5883\u53d8\u91cf\u3002
      \n\u91cc\u9762\u8bb0\u5f55\u7684\u4fe1\u606f\u5305\u62ec：<\/p>\n

        \n
      • \u5f53\u524d\u662f\u8c01\u767b\u5f55\u7528\u6237（USER）<\/li>\n
      • \u4e3b\u673a\u540d\u5b57（HOSTNAME）<\/li>\n
      • \u547d\u4ee4\u53bb\u54ea\u91cc\u627e（PATH）<\/li>\n
      • \u52a8\u6001\u5e93\u53bb\u54ea\u91cc\u627e（LD_LIBRARY_PATH）<\/li>\n
      • \u5386\u53f2\u547d\u4ee4\u6700\u591a\u5b58\u591a\u5c11\u6761（HISTSIZE）<\/li>\n<\/ul>\n

        \u91cd\u70b9：\u73af\u5883\u53d8\u91cf\u6700\u5927\u7684\u7279\u6027：\u5b50\u8fdb\u7a0b\u4f1a\u7ee7\u627f\u7236\u8fdb\u7a0b\u7684\u73af\u5883\u53d8\u91cf\u3002
        \n\u8fd9\u5c31\u89e3\u91ca\u4e86：\u4e3a\u4ec0\u4e48gcc\u3001g++\u3001sudo\u3001su\u8fd9\u4e9b\u5de5\u5177\u90fd\u53ef\u4ee5\u8bfb\u53d6\u73af\u5883\u53d8\u91cf\u3002<\/p>\n

          \n
        • gcc\/g++ \u7ee7\u627f shell \u7684\u73af\u5883\u53d8\u91cf，\u8bfb\u53d6LD_LIBRARY_PATH\u53bb\u5bfb\u627e\u52a8\u6001\u5e93，\u8bfb\u53d6PATH\u5bfb\u627e\u7f16\u8bd1\u5de5\u5177\u94fe\u3002<\/li>\n
        • su\/sudo \u7ee7\u627f shell \u7684\u73af\u5883\u53d8\u91cf，\u53ef\u4ee5\u8bfb\u53d6\u7cfb\u7edf\u4fe1\u606f，\u5b8c\u6210\u5207\u6362\u7528\u6237\u3001\u67e5\u627e\u547d\u4ee4\u7b49\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n
          1.1.2 \u5e38\u89c1\u73af\u5883\u53d8\u91cf<\/h5>\n

          \u8868\u683c<\/p>\n\n\u53d8\u91cf\u540d\u4f5c\u7528<\/tr>\n\n\n\n\n\n\n\n\n
          PATH<\/td>\n\u547d\u4ee4\u641c\u7d22\u8def\u5f84，shell \u5728\u8fd9\u91cc\u627e\u53ef\u6267\u884c\u7a0b\u5e8f<\/td>\n<\/tr>\n
          HOME<\/td>\n\u5f53\u524d\u7528\u6237\u5bb6\u76ee\u5f55<\/td>\n<\/tr>\n
          USER<\/td>\n\u5f53\u524d\u4f1a\u8bdd\u7528\u6237\u540d<\/td>\n<\/tr>\n
          LOGNAME<\/td>\n\u767b\u5f55\u7528\u6237\u540d<\/td>\n<\/tr>\n
          HOSTNAME<\/td>\n\u4e3b\u673a\u540d<\/td>\n<\/tr>\n
          LD_LIBRARY_PATH<\/td>\n\u52a8\u6001\u94fe\u63a5\u5e93\u641c\u7d22\u8def\u5f84<\/td>\n<\/tr>\n
          HISTSIZE<\/td>\nshell \u5386\u53f2\u547d\u4ee4\u4fdd\u5b58\u6761\u6570<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
          1.1.3 \u600e\u4e48\u770b\u73af\u5883\u53d8\u91cf<\/h5>\n

          # \u6253\u5370\u5168\u90e8\u73af\u5883\u53d8\u91cf<\/span>
          \nenv<\/span>
          \nprintenv<\/span><\/p>\n

          # \u6253\u5370\u5355\u4e2a\u73af\u5883\u53d8\u91cf<\/span>
          \necho<\/span> $PATH<\/span>
          \necho<\/span> $HOME<\/span><\/p>\n

          1.1.4 \u73af\u5883\u53d8\u91cf\u548c\u672c\u5730\u53d8\u91cf\u7684\u8bbe\u7f6e\u548c\u5bfc\u5165<\/h5>\n

          shell \u91cc\u9762\u6709\u4e24\u79cd\u53d8\u91cf：<\/p>\n

        • shell \u672c\u5730\u53d8\u91cf：\u53ea\u5728\u5f53\u524d shell \u751f\u6548，\u5b50\u8fdb\u7a0b\u770b\u4e0d\u5230\u3002<\/li>\n
        • \u73af\u5883\u53d8\u91cf：\u901a\u8fc7export\u5bfc\u51fa，\u5b50\u8fdb\u7a0b\u53ef\u4ee5\u7ee7\u627f\u3002<\/li>\n
          1.1.4.1 \u6838\u5fc3\u6982\u5ff5\u5bf9\u6bd4<\/h6>\n

          # \u5b9a\u4e49shell\u672c\u5730\u53d8\u91cf（\u5b50\u8fdb\u7a0b\u4e0d\u53ef\u89c1）<\/span>
          \nMY_VAR<\/span>=<\/span>"hello world"<\/span><\/p>\n

          # \u5bfc\u51fa\u4e3a\u73af\u5883\u53d8\u91cf（\u5b50\u8fdb\u7a0b\u53ef\u4ee5\u7ee7\u627f）<\/span>
          \nexport<\/span> MY_VAR<\/p>\n

          1.1.4.2 \u53d8\u91cf\u7684\u64cd\u4f5c\u6307\u4ee4<\/h6>\n

          export<\/span> \u53d8\u91cf\u540d=<\/span>\u503c # \u8bbe\u7f6e\u73af\u5883\u53d8\u91cf<\/span>
          \nunset<\/span> \u53d8\u91cf\u540d # \u5220\u9664\u53d8\u91cf<\/span><\/p>\n

          \u26a0\ufe0f\u6ce8\u610f：\u76f4\u63a5\u5199MY_VAR=xxx，\u53ea\u662f shell \u5c40\u90e8\u53d8\u91cf；\u4e0d\u52a0 export，\u5b50\u8fdb\u7a0b\u62ff\u4e0d\u5230\u8fd9\u4e2a\u53d8\u91cf\u3002<\/p>\n

          1.2 main \u51fd\u6570\u7684\u7b2c\u4e09\u4e2a\u53c2\u6570<\/h4>\n

          \u5f88\u591a\u4eba\u4e0d\u77e5\u9053 main \u51fd\u6570\u8fd8\u6709\u7b2c\u4e09\u4e2a\u9690\u85cf\u53c2\u6570，\u7528\u6765\u63a5\u6536\u73af\u5883\u53d8\u91cf\u8868：<\/p>\n

          int<\/span> main<\/span>(<\/span>int<\/span> argc,<\/span> char<\/span> *<\/span>argv[<\/span>]<\/span>,<\/span> char<\/span> *<\/span>envp[<\/span>]<\/span>)<\/span><\/p>\n

          envp\u662f\u5b57\u7b26\u4e32\u6307\u9488\u6570\u7ec4，\u6bcf\u4e00\u4e2a\u5143\u7d20\u683c\u5f0f\u4e3aKEY=VALUE，\u6570\u7ec4\u672b\u5c3e\u4ee5NULL\u7ed3\u675f\u3002<\/p>\n

          \u793a\u4f8b\u4ee3\u7801：<\/p>\n

          \/\/ env_main.c<\/span>
          \n#<\/span>include<\/span> <stdio.h><\/span><\/span>
          \nint<\/span> main<\/span>(<\/span>int<\/span> argc,<\/span> char<\/span> *<\/span>argv[<\/span>]<\/span>,<\/span> char<\/span> *<\/span>envp[<\/span>]<\/span>)<\/span>
          \n{<\/span>
          \n for<\/span>(<\/span>int<\/span> i =<\/span> 0<\/span>;<\/span> envp[<\/span>i]<\/span> !=<\/span> NULL<\/span>;<\/span> i++<\/span>)<\/span>
          \n {<\/span>
          \n printf<\/span>(<\/span>"%s\\\\n"<\/span>,<\/span> envp[<\/span>i]<\/span>)<\/span>;<\/span>
          \n }<\/span>
          \n return<\/span> 0<\/span>;<\/span>
          \n}<\/span><\/p>\n

          \u7f16\u8bd1\u8fd0\u884c，\u5c31\u4f1a\u6253\u5370\u51fa\u5168\u90e8\u73af\u5883\u53d8\u91cf\u3002<\/p>\n

          \u6ce8\u610f：\u8fd9\u4e2a\u7b2c\u4e09\u4e2a\u53c2\u6570\u662f GCC \u7684\u6269\u5c55，\u6807\u51c6 C \u4e0d\u63a8\u8350\u76f4\u63a5\u4f7f\u7528，\u6807\u51c6\u63a8\u8350\u4f7f\u7528getenv()\u6216\u8005\u5168\u5c40environ\u6307\u9488\u3002<\/p>\n

          1.3 \u4e3a\u4ec0\u4e48\u6267\u884c\u81ea\u5df1\u7684\u7a0b\u5e8f\u5fc5\u987b\u52a0 .\/<\/h4>\n

          .\/myprogram<\/p>\n

          \u4e3a\u4ec0\u4e48\u4e0d\u80fd\u76f4\u63a5\u5199myprogram？<\/p>\n

          shell \u6267\u884c\u547d\u4ee4\u7684\u65f6\u5019，\u4f1a\u53bbPATH\u73af\u5883\u53d8\u91cf\u8bb0\u5f55\u7684\u76ee\u5f55\u91cc\u9762\u6328\u4e2a\u627e\u53ef\u6267\u884c\u6587\u4ef6\u3002
          \n\u5f53\u524d\u76ee\u5f55.\u9ed8\u8ba4\u4e0d\u5728 PATH \u91cc\u9762，\u6240\u4ee5 shell \u627e\u4e0d\u5230\u4f60\u7684\u7a0b\u5e8f，\u5fc5\u987b\u7528.\/\u663e\u5f0f\u544a\u8bc9 shell：\u5728\u5f53\u524d\u76ee\u5f55\u627e\u8fd9\u4e2a\u7a0b\u5e8f\u3002<\/p>\n

          \u5982\u679c\u4f60\u628a.\u52a0\u5165 PATH，\u5c31\u53ef\u4ee5\u76f4\u63a5\u5199\u7a0b\u5e8f\u540d\u8fd0\u884c，\u4f46\u8fd9\u5b58\u5728\u5b89\u5168\u98ce\u9669，\u4e0d\u5efa\u8bae\u751f\u4ea7\u73af\u5883\u8fd9\u4e48\u505a\u3002<\/p>\n

          \n

          \u4e8c\u3001\u73af\u5883\u53d8\u91cf\u7684\u5e95\u5c42\u8868\u7ed3\u6784\u4e0e\u6eaf\u6e90<\/h3>\n

          2.1 \u73af\u5883\u53d8\u91cf\u8868\u7684\u7ec4\u7ec7\u5f62\u5f0f<\/h4>\n

          \u73af\u5883\u53d8\u91cf\u8868\u672c\u8d28\u5c31\u662fchar *envp[]\u6307\u9488\u6570\u7ec4：<\/p>\n

          envp[<\/span>0<\/span>]<\/span> \u2192 "PATH=\/usr\/bin:\/bin"<\/span>
          \nenvp[<\/span>1<\/span>]<\/span> \u2192 "HOME=\/home\/ubuntu"<\/span>
          \nenvp[<\/span>2<\/span>]<\/span> \u2192 "USER=ubuntu"<\/span>
          \nenvp[<\/span>3<\/span>]<\/span> \u2192 NULL<\/p>\n

          \u6bcf\u4e00\u6761\u5b57\u7b26\u4e32\u683c\u5f0f\u56fa\u5b9a\u4e3a\u952e=\u503c，\u6570\u7ec4\u672b\u5c3e\u7528NULL\u6807\u8bb0\u7ed3\u675f\u3002
          \n\u8fd9\u5757\u5185\u5b58\u4f4d\u4e8e\u8fdb\u7a0b\u5730\u5740\u7a7a\u95f4\u7684\u7528\u6237\u6808\u9ad8\u5730\u5740，\u548c\u547d\u4ee4\u884c\u53c2\u6570\u6328\u5728\u4e00\u8d77\u3002<\/p>\n

          2.2 \u73af\u5883\u53d8\u91cf\u7684\u5185\u5b58\u7ea7\u548c\u78c1\u76d8\u7ea7\u4fee\u6539<\/h4>\n
            \n
          • \u5185\u5b58\u7ea7\u4fee\u6539（\u4e34\u65f6）：shell \u6267\u884cexport，\u53ea\u5bf9\u5f53\u524d shell \u4f1a\u8bdd\u751f\u6548，\u5173\u95ed\u7ec8\u7aef\u5c31\u6d88\u5931\u3002<\/li>\n
          • \u78c1\u76d8\u7ea7\u4fee\u6539（\u6c38\u4e45）：\u4fee\u6539\u914d\u7f6e\u6587\u4ef6，\u767b\u5f55 shell \u7684\u65f6\u5019\u81ea\u52a8\u52a0\u8f7d\u73af\u5883\u53d8\u91cf\u3002\n
              \n
            • \u7528\u6237\u7ea7\u522b：~\/.bashrc\u3001~\/.profile，\u53ea\u5bf9\u5f53\u524d\u7528\u6237\u751f\u6548<\/li>\n
            • \u7cfb\u7edf\u7ea7\u522b：\/etc\/profile，\u5bf9\u6240\u6709\u7528\u6237\u751f\u6548<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n

              \u4fee\u6539\u5b8c\u78c1\u76d8\u914d\u7f6e\u6587\u4ef6，\u9700\u8981\u6267\u884csource ~\/.bashrc，\u8ba9\u914d\u7f6e\u7acb\u523b\u751f\u6548\u3002<\/p>\n

              2.3 \u600e\u4e48\u5728 windows \u4e0b\u4fee\u6539\u73af\u5883\u53d8\u91cf<\/h4>\n

              Windows \u73af\u5883\u53d8\u91cf\u903b\u8f91\u548c Linux \u7c7b\u4f3c：<\/p>\n

            • \u6b64\u7535\u8111 \u2192 \u53f3\u952e\u5c5e\u6027 \u2192 \u9ad8\u7ea7\u7cfb\u7edf\u8bbe\u7f6e \u2192 \u73af\u5883\u53d8\u91cf<\/li>\n
            • \u5206\u4e3a\u7528\u6237\u73af\u5883\u53d8\u91cf（\u5f53\u524d\u7528\u6237）\u3001\u7cfb\u7edf\u73af\u5883\u53d8\u91cf（\u5168\u90e8\u7528\u6237）<\/li>\n
            • \u4fee\u6539\u540e\u65b0\u5f00 cmd \u7a97\u53e3\u751f\u6548，\u65e7\u7a97\u53e3\u4e0d\u4f1a\u81ea\u52a8\u66f4\u65b0\u3002<\/li>\n
              \n

              \u4e09\u3001\u83b7\u53d6\u73af\u5883\u53d8\u91cf\u7684\u4e09\u79cd\u6838\u5fc3\u4ee3\u7801\u624b\u6bb5<\/h3>\n

              \u6ce8\u610f：main \u7b2c\u4e09\u4e2a\u53c2\u6570\u3001getenv\u3001environ\u3001\u5b50\u8fdb\u7a0b\u7ee7\u627f，\u4e00\u5171 4 \u79cd\u65b9\u5f0f\u3002<\/p>\n

              3.1 \u65b9\u6cd5\u4e00：\u901a\u8fc7 main \u51fd\u6570\u7684\u7b2c\u4e09\u4e2a\u53c2\u6570\u9690\u5f0f\u83b7\u53d6<\/h4>\n

              \u5c31\u662f\u4e0a\u9762\u5199\u7684char *envp[]，\u76f4\u63a5\u904d\u5386\u6570\u7ec4\u8bfb\u53d6\u73af\u5883\u53d8\u91cf\u3002
              \n\u7f3a\u70b9：\u6807\u51c6 C \u4e0d\u652f\u6301，\u5c5e\u4e8e\u7f16\u8bd1\u5668\u6269\u5c55，\u53ef\u79fb\u690d\u6027\u5dee\u3002<\/p>\n

              3.2 \u65b9\u6cd5\u4e8c：\u901a\u8fc7\u7cfb\u7edf\u8c03\u7528 API getenv \u83b7\u53d6（\u2705\u6700\u63a8\u8350）<\/h4>\n

              C \u6807\u51c6\u5e93\u63d0\u4f9bgetenv()，\u8f93\u5165\u73af\u5883\u53d8\u91cf key，\u8fd4\u56de\u5bf9\u5e94\u7684 value \u5b57\u7b26\u4e32\u3002<\/p>\n

              \/\/ getenv_demo.c<\/span>
              \n#<\/span>include<\/span> <stdio.h><\/span><\/span>
              \n#<\/span>include<\/span> <stdlib.h><\/span><\/span><\/p>\n

              int<\/span> main<\/span>(<\/span>)<\/span>
              \n{<\/span>
              \n char<\/span> *<\/span>path =<\/span> getenv<\/span>(<\/span>"PATH"<\/span>)<\/span>;<\/span>
              \n if<\/span>(<\/span>path !=<\/span> NULL<\/span>)<\/span>
              \n {<\/span>
              \n printf<\/span>(<\/span>"PATH = %s\\\\n"<\/span>,<\/span> path)<\/span>;<\/span>
              \n }<\/span>
              \n char<\/span> *<\/span>user =<\/span> getenv<\/span>(<\/span>"USER"<\/span>)<\/span>;<\/span>
              \n printf<\/span>(<\/span>"USER = %s\\\\n"<\/span>,<\/span> user)<\/span>;<\/span>
              \n return<\/span> 0<\/span>;<\/span>
              \n}<\/span><\/p>\n

              \u7f16\u8bd1\u8fd0\u884c：<\/p>\n

              gcc getenv_demo.c -o<\/span> getenv_demo
              \n.\/getenv_demo<\/p>\n

              \u4f18\u70b9：\u6807\u51c6 C \u5e93\u51fd\u6570，\u8de8\u5e73\u53f0，\u4ee3\u7801\u7b80\u6d01\u3002<\/p>\n

              3.3 \u65b9\u6cd5\u4e09：\u901a\u8fc7\u5168\u5c40\u7b2c\u4e09\u65b9\u6307\u9488environ\u663e\u5f0f\u83b7\u53d6<\/h4>\n

              \u5185\u6838\u7ed9\u6211\u4eec\u63d0\u4f9b\u4e00\u4e2a\u5168\u5c40\u7684\u4e8c\u7ea7\u6307\u9488environ，\u4e0d\u9700\u8981 main \u7b2c\u4e09\u4e2a\u53c2\u6570，\u76f4\u63a5\u4f7f\u7528\u3002<\/p>\n

              \u9700\u8981\u624b\u52a8\u58f0\u660e extern char **environ;<\/p>\n

              \/\/ environ_demo.c<\/span>
              \n#<\/span>include<\/span> <stdio.h><\/span><\/span>
              \nextern<\/span> char<\/span> *<\/span>*<\/span>environ;<\/span><\/p>\n

              int<\/span> main<\/span>(<\/span>)<\/span>
              \n{<\/span>
              \n for<\/span>(<\/span>int<\/span> i =<\/span> 0<\/span>;<\/span> environ[<\/span>i]<\/span> !=<\/span> NULL<\/span>;<\/span> i++<\/span>)<\/span>
              \n {<\/span>
              \n printf<\/span>(<\/span>"%s\\\\n"<\/span>,<\/span> environ[<\/span>i]<\/span>)<\/span>;<\/span>
              \n }<\/span>
              \n return<\/span> 0<\/span>;<\/span>
              \n}<\/span><\/p>\n

              environ\u5168\u5c40\u6307\u9488，\u76f4\u63a5\u6307\u5411\u8fdb\u7a0b\u7684\u73af\u5883\u53d8\u91cf\u8868\u7684\u8d77\u59cb\u5730\u5740\u3002<\/p>\n

              3.4 \u65b9\u6cd5\u56db：\u5b50\u8fdb\u7a0b\u7ee7\u627f\u7236\u8fdb\u7a0b\u83b7\u53d6\u73af\u5883\u53d8\u91cf<\/h4>\n

              3.4.1 \u6838\u5fc3\u539f\u7406<\/h5>\n

              \u5f53\u6211\u4eec\u8c03\u7528fork()\u521b\u5efa\u5b50\u8fdb\u7a0b\u7684\u65f6\u5019：
              \n\u5b50\u8fdb\u7a0b\u4f1a\u62f7\u8d1d\u7236\u8fdb\u7a0b\u7684\u5b8c\u6574\u5730\u5740\u7a7a\u95f4，\u73af\u5883\u53d8\u91cf\u8868\u4e5f\u5b8c\u6574\u590d\u5236\u4e00\u4efd\u3002
              \n\u6240\u4ee5\u5b50\u8fdb\u7a0b\u5929\u7136\u62e5\u6709\u7236\u8fdb\u7a0b\u5168\u90e8\u73af\u5883\u53d8\u91cf\u3002<\/p>\n

              \u540e\u7eed\u8c03\u7528exec\u52a0\u8f7d\u65b0\u7a0b\u5e8f，\u9ed8\u8ba4\u4fdd\u7559\u73af\u5883\u53d8\u91cf，\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48gcc\u3001sudo\u8fd9\u4e9b\u5b50\u8fdb\u7a0b\u53ef\u4ee5\u62ff\u5230 shell \u7684\u73af\u5883\u53d8\u91cf\u3002<\/p>\n

              exec \u4e5f\u53ef\u4ee5\u4f7f\u7528execle()，\u4f20\u5165\u81ea\u5b9a\u4e49\u7684\u73af\u5883\u53d8\u91cf\u8868，\u4e0d\u7ee7\u627f\u7236\u8fdb\u7a0b\u3002<\/p>\n

              3.4.2 \u793a\u4f8b\u4ee3\u7801<\/h5>\n

              \/\/ fork_env.c<\/span>
              \n#<\/span>include<\/span> <stdio.h><\/span><\/span>
              \n#<\/span>include<\/span> <unistd.h><\/span><\/span>
              \n#<\/span>include<\/span> <stdlib.h><\/span><\/span><\/p>\n

              int<\/span> main<\/span>(<\/span>)<\/span>
              \n{<\/span>
              \n pid_t<\/span> pid =<\/span> fork<\/span>(<\/span>)<\/span>;<\/span>
              \n if<\/span>(<\/span>pid ==<\/span> 0<\/span>)<\/span>
              \n {<\/span>
              \n \/\/ \u5b50\u8fdb\u7a0b，\u8bfb\u53d6PATH<\/span>
              \n printf<\/span>(<\/span>"[\u5b50\u8fdb\u7a0b] PATH = %s\\\\n"<\/span>,<\/span> getenv<\/span>(<\/span>"PATH"<\/span>)<\/span>)<\/span>;<\/span>
              \n }<\/span>
              \n else<\/span>
              \n {<\/span>
              \n printf<\/span>(<\/span>"[\u7236\u8fdb\u7a0b] PATH = %s\\\\n"<\/span>,<\/span> getenv<\/span>(<\/span>"PATH"<\/span>)<\/span>)<\/span>;<\/span>
              \n }<\/span>
              \n return<\/span> 0<\/span>;<\/span>
              \n}<\/span><\/p>\n

              \u8fd0\u884c\u53ef\u4ee5\u770b\u5230\u7236\u5b50\u8fdb\u7a0b\u6253\u5370\u51fa\u4e00\u6a21\u4e00\u6837\u7684 PATH，\u8bc1\u660e\u7ee7\u627f\u751f\u6548\u3002<\/p>\n

              \n

              \u56db\u3001\u5176\u4ed6\u73af\u5883\u53d8\u91cf<\/h3>\n

              4.1 \u6240\u6709\u73af\u5883\u53d8\u91cf\u7f57\u5217<\/h4>\n

              \u6267\u884cenv\u547d\u4ee4，\u5c31\u53ef\u4ee5\u5217\u51fa\u5f53\u524d\u8fdb\u7a0b\u5168\u90e8\u73af\u5883\u53d8\u91cf\u3002<\/p>\n

              4.1.1 USER \u548c LOGNAME \u7684\u533a\u522b<\/h5>\n
                \n
              • LOGNAME：\u8bb0\u5f55\u767b\u5f55\u7ec8\u7aef\u7684\u539f\u59cb\u7528\u6237\u3002<\/li>\n
              • USER：\u8bb0\u5f55\u5f53\u524d\u4f1a\u8bdd\u7684\u7528\u6237\u3002<\/li>\n<\/ul>\n

                \u4e3e\u4f8b\u5b50：\u7528 ubuntu \u8d26\u53f7\u767b\u5f55\u7ec8\u7aef，\u7136\u540e\u6267\u884csudo su root\u5207\u6362 root\u3002
                \n\u6b64\u65f6LOGNAME\u4ecd\u7136\u662f ubuntu，\u800cUSER\u53d8\u6210 root\u3002<\/p>\n

                4.1.2 \u5386\u53f2\u547d\u4ee4\u4e0e HISTSIZE<\/h5>\n

                HISTSIZE\u8fd9\u4e2a\u73af\u5883\u53d8\u91cf\u63a7\u5236 shell \u5386\u53f2\u547d\u4ee4\u6700\u591a\u4fdd\u5b58\u591a\u5c11\u6761\u3002<\/p>\n

                echo<\/span> $HISTSIZE<\/span><\/p>\n

                \u4fee\u6539\u8fd9\u4e2a\u503c，\u5c31\u53ef\u4ee5\u8c03\u6574 shell \u5386\u53f2\u547d\u4ee4\u7684\u5b58\u50a8\u4e0a\u9650\u3002<\/p>\n

                4.2 \u73af\u5883\u7ed1\u5b9a\u4e0e\u6743\u9650\u63a7\u5236\u7528\u6cd5<\/h4>\n

                \u73af\u5883\u53d8\u91cf\u53ef\u4ee5\u7528\u6765\u7ed9\u7a0b\u5e8f\u4f20\u9012\u914d\u7f6e，\u4e0d\u9700\u8981\u4fee\u6539\u6e90\u4ee3\u7801，\u53ea\u9700\u8981\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf\u5c31\u6539\u53d8\u7a0b\u5e8f\u884c\u4e3a\u3002\u4f46\u662f\u4e5f\u5b58\u5728\u5b89\u5168\u98ce\u9669\u3002<\/p>\n

                4.2.1 \u6838\u5fc3\u903b\u8f91\u4e0e\u5b89\u5168\u9632\u8303<\/h5>\n

                \u26a0\ufe0f\u5b89\u5168\u5751\u70b9：\u5982\u679c\u7a0b\u5e8f\u662f root \u6743\u9650\u8fd0\u884c，\u73af\u5883\u53d8\u91cf\u6765\u81ea\u666e\u901a\u7528\u6237，\u6076\u610f\u7528\u6237\u53ef\u4ee5\u7be1\u6539\u73af\u5883\u53d8\u91cf，\u5b9e\u73b0\u653b\u51fb，\u6bd4\u5982 PATH \u52ab\u6301\u3002
                \n\u6240\u4ee5\u9ad8\u6743\u9650\u7a0b\u5e8f，\u5f88\u591a\u4f1a\u4e3b\u52a8\u6e05\u7a7a\u6216\u8005\u8fc7\u6ee4\u73af\u5883\u53d8\u91cf\u3002<\/p>\n

                4.2.1.1 \u793a\u4f8b\u4ee3\u7801<\/h6>\n

                \/\/ secure_env.c<\/span>
                \n#<\/span>include<\/span> <stdio.h><\/span><\/span>
                \n#<\/span>include<\/span> <stdlib.h><\/span><\/span><\/p>\n

                int<\/span> main<\/span>(<\/span>)<\/span>
                \n{<\/span>
                \n \/\/ \u9ad8\u6743\u9650\u7a0b\u5e8f，\u4e0d\u8981\u65e0\u6761\u4ef6\u4fe1\u4efb\u73af\u5883\u53d8\u91cf<\/span>
                \n char<\/span> *<\/span>debug =<\/span> getenv<\/span>(<\/span>"DEBUG"<\/span>)<\/span>;<\/span>
                \n if<\/span>(<\/span>debug !=<\/span> NULL<\/span>)<\/span>
                \n {<\/span>
                \n printf<\/span>(<\/span>"DEBUG\u6a21\u5f0f\u5f00\u542f\\\\n"<\/span>)<\/span>;<\/span>
                \n }<\/span>
                \n return<\/span> 0<\/span>;<\/span>
                \n}<\/span><\/p>\n

                4.2.3 \u57fa\u4e8e\u81ea\u5b9a\u4e49\u73af\u5883\u53d8\u91cf\u7684\u63a7\u5236\u903b\u8f91<\/h5>\n

                \u4e1a\u52a1\u7a0b\u5e8f\u53ef\u4ee5\u81ea\u5b9a\u4e49\u73af\u5883\u53d8\u91cf，\u4f5c\u4e3a\u914d\u7f6e\u5f00\u5173\u3002<\/p>\n

                4.2.3.1 \u793a\u4f8b\u4ee3\u7801<\/h6>\n

                \/\/ custom_env.c<\/span>
                \n#<\/span>include<\/span> <stdio.h><\/span><\/span>
                \n#<\/span>include<\/span> <stdlib.h><\/span><\/span><\/p>\n

                int<\/span> main<\/span>(<\/span>)<\/span>
                \n{<\/span>
                \n char<\/span> *<\/span>mode =<\/span> getenv<\/span>(<\/span>"RUN_MODE"<\/span>)<\/span>;<\/span>
                \n if<\/span>(<\/span>mode ==<\/span> NULL<\/span>)<\/span>
                \n {<\/span>
                \n printf<\/span>(<\/span>"\u9ed8\u8ba4\u751f\u4ea7\u6a21\u5f0f\\\\n"<\/span>)<\/span>;<\/span>
                \n }<\/span>
                \n else<\/span> if<\/span>(<\/span>strcmp<\/span>(<\/span>mode,<\/span> "debug"<\/span>)<\/span> ==<\/span> 0<\/span>)<\/span>
                \n {<\/span>
                \n printf<\/span>(<\/span>"\u8c03\u8bd5\u6a21\u5f0f\\\\n"<\/span>)<\/span>;<\/span>
                \n }<\/span>
                \n return<\/span> 0<\/span>;<\/span>
                \n}<\/span><\/p>\n

                \u8fd0\u884c\u6d4b\u8bd5：<\/p>\n

                # \u751f\u4ea7\u6a21\u5f0f<\/span>
                \n.\/custom_env<\/p>\n

                # \u8c03\u8bd5\u6a21\u5f0f<\/span>
                \nexport<\/span> RUN_MODE<\/span>=<\/span>debug
                \n.\/custom_env<\/p>\n

                \u4e0d\u7528\u6539\u4ee3\u7801，\u53ea\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf，\u5c31\u5207\u6362\u7a0b\u5e8f\u8fd0\u884c\u6a21\u5f0f\u3002<\/p>\n

                \n

                \u5168\u6587\u603b\u7ed3<\/h3>\n
              • \u547d\u4ee4\u884c\u53c2\u6570：shell \u628a\u547d\u4ee4\u5207\u5272\u6210\u5b57\u7b26\u4e32\u6570\u7ec4，\u4f20\u9012\u7ed9 main \u51fd\u6570\u7684argc\/argv，\u7528\u6765\u7ed9\u7a0b\u5e8f\u4f20\u9012\u542f\u52a8\u53c2\u6570\u3002<\/li>\n
              • \u73af\u5883\u53d8\u91cf：\u64cd\u4f5c\u7cfb\u7edf\u7ed9\u8fdb\u7a0b\u7684\u4e00\u7ec4\u7279\u6b8a\u5168\u5c40\u53d8\u91cf，\u4fdd\u5b58\u7cfb\u7edf\u3001\u7528\u6237\u4fe1\u606f，\u683c\u5f0f\u4e3aKEY=VALUE\u3002<\/li>\n
              • shell \u672c\u5730\u53d8\u91cf\u5fc5\u987b\u7528export\u5bfc\u51fa，\u624d\u4f1a\u53d8\u6210\u73af\u5883\u53d8\u91cf\u88ab\u5b50\u8fdb\u7a0b\u7ee7\u627f\u3002<\/li>\n
              • 4 \u79cd\u83b7\u53d6\u73af\u5883\u53d8\u91cf\u7684\u65b9\u5f0f：\n
                  \n
                • main \u7b2c\u4e09\u4e2a\u53c2\u6570 envp（\u53ef\u79fb\u690d\u5dee）<\/li>\n
                • getenv()\u6807\u51c6\u5e93\u51fd\u6570（\u63a8\u8350）<\/li>\n
                • \u5168\u5c40environ\u6307\u9488<\/li>\n
                • fork \u5b50\u8fdb\u7a0b\u7ee7\u627f\u7236\u8fdb\u7a0b\u73af\u5883\u53d8\u91cf<\/li>\n<\/ul>\n<\/li>\n
                • \u7ee7\u627f\u539f\u7406：fork\u62f7\u8d1d\u5730\u5740\u7a7a\u95f4，\u73af\u5883\u53d8\u91cf\u8868\u590d\u5236；exec\u9ed8\u8ba4\u4fdd\u7559\u73af\u5883\u53d8\u91cf\u3002<\/li>\n
                • \u4e3a\u4ec0\u4e48 gcc\/g++\u3001sudo \u53ef\u4ee5\u8bfb\u53d6\u73af\u5883\u53d8\u91cf：\u5b83\u4eec\u90fd\u662f shell \u7684\u5b50\u8fdb\u7a0b，\u7ee7\u627f shell \u7684\u73af\u5883\u53d8\u91cf\u3002<\/li>\n
                • \u73af\u5883\u53d8\u91cf\u53ef\u4ee5\u505a\u914d\u7f6e\u63a7\u5236，\u4f46\u9ad8\u6743\u9650\u7a0b\u5e8f\u8981\u8b66\u60d5\u73af\u5883\u53d8\u91cf\u5e26\u6765\u7684\u5b89\u5168\u98ce\u9669\u3002
                  \n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/li>\n","protected":false},"excerpt":{"rendered":"

                  \u4e0a\u4e00\u7bc7\u6211\u4eec\u8bb2\u5b8c\u4e86 Linux O (1) \u8c03\u5ea6\u7b97\u6cd5，\u641e\u61c2\u4e86\u8fdb\u7a0b\u5982\u4f55\u88ab\u8c03\u5ea6\u4e0a CPU \u8fd0\u884c\u3002
                  \n\u4f46\u4e00\u4e2a\u8fdb\u7a0b\u542f\u52a8\u4e4b\u540e，\u9664\u4e86\u81ea\u5df1\u7684\u4ee3\u7801\u3001\u6570\u636e，\u64cd\u4f5c\u7cfb\u7edf\u8fd8\u4f1a\u7ed9\u5b83\u9644\u5e26\u4e24\u4efd \u201c\u968f\u8eab\u8d44\u6599\u201d：\u547d\u4ee4\u884c\u53c2\u6570 \u548c \u73af\u5883\u53d8\u91cf\u3002
                  \n\u5f88\u591a\u4eba\u5929\u5929\u6572\u547d\u4ee4，gcc\u3001g\u3001sudo\u3001su，\u5374\u5f88\u5c11\u601d\u8003：
                  \n\u4e3a\u4ec0\u4e48 gcc \u53ef\u4ee5\u81ea\u52a8\u627e\u5230\u7cfb\u7edf\u7684\u5e93\u6587\u4ef6？\u4e3a\u4ec0\u4e48 shell \u53ef\u4ee5\u5728 PATH \u91cc\u9762\u641c\u7d22\u547d\u4ee4&#xff1f<\/p>\n","protected":false},"author":2,"featured_media":100224,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[55,58,43],"topic":[],"class_list":["post-100226","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-c","tag-linux","tag-43"],"yoast_head":"\nRe:Linux \u7cfb\u7edf\u7bc7\uff08\u5341\u4e03\uff09\uff1a\u8fdb\u7a0b\u7bc7\uff08\u516d\uff09\uff1a\u73af\u5883\u53d8\u91cf\u6df1\u5ea6\u89e3\u6790\uff5c\u547d\u4ee4\u884c\u53c2\u6570\u3001\u73af\u5883\u53d8\u91cf\u8868\u30014 \u79cd\u83b7\u53d6\u65b9\u5f0f\u4e0e\u7ee7\u627f\u673a\u5236\u4e07\u5b57\u8be6\u89e3 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/100226.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Re:Linux \u7cfb\u7edf\u7bc7\uff08\u5341\u4e03\uff09\uff1a\u8fdb\u7a0b\u7bc7\uff08\u516d\uff09\uff1a\u73af\u5883\u53d8\u91cf\u6df1\u5ea6\u89e3\u6790\uff5c\u547d\u4ee4\u884c\u53c2\u6570\u3001\u73af\u5883\u53d8\u91cf\u8868\u30014 \u79cd\u83b7\u53d6\u65b9\u5f0f\u4e0e\u7ee7\u627f\u673a\u5236\u4e07\u5b57\u8be6\u89e3 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u4e0a\u4e00\u7bc7\u6211\u4eec\u8bb2\u5b8c\u4e86 Linux O (1) \u8c03\u5ea6\u7b97\u6cd5，\u641e\u61c2\u4e86\u8fdb\u7a0b\u5982\u4f55\u88ab\u8c03\u5ea6\u4e0a CPU \u8fd0\u884c\u3002 \u4f46\u4e00\u4e2a\u8fdb\u7a0b\u542f\u52a8\u4e4b\u540e，\u9664\u4e86\u81ea\u5df1\u7684\u4ee3\u7801\u3001\u6570\u636e，\u64cd\u4f5c\u7cfb\u7edf\u8fd8\u4f1a\u7ed9\u5b83\u9644\u5e26\u4e24\u4efd \u201c\u968f\u8eab\u8d44\u6599\u201d：\u547d\u4ee4\u884c\u53c2\u6570 \u548c \u73af\u5883\u53d8\u91cf\u3002 \u5f88\u591a\u4eba\u5929\u5929\u6572\u547d\u4ee4，gcc\u3001g\u3001sudo\u3001su，\u5374\u5f88\u5c11\u601d\u8003： \u4e3a\u4ec0\u4e48 gcc \u53ef\u4ee5\u81ea\u52a8\u627e\u5230\u7cfb\u7edf\u7684\u5e93\u6587\u4ef6？\u4e3a\u4ec0\u4e48 shell \u53ef\u4ee5\u5728 PATH \u91cc\u9762\u641c\u7d22\u547d\u4ee4&#xff1f\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/100226.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2026-09-03T23:34:07+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260903233406-6a9a03ee522c9.jpg\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/100226.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/100226.html\",\"name\":\"Re:Linux \u7cfb\u7edf\u7bc7\uff08\u5341\u4e03\uff09\uff1a\u8fdb\u7a0b\u7bc7\uff08\u516d\uff09\uff1a\u73af\u5883\u53d8\u91cf\u6df1\u5ea6\u89e3\u6790\uff5c\u547d\u4ee4\u884c\u53c2\u6570\u3001\u73af\u5883\u53d8\u91cf\u8868\u30014 \u79cd\u83b7\u53d6\u65b9\u5f0f\u4e0e\u7ee7\u627f\u673a\u5236\u4e07\u5b57\u8be6\u89e3 - 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