3. \u547d\u4ee4\u94fe\u63a5<\/h3>\n

\u4f7f\u7528\u547d\u4ee4\u94fe\u63a5\u6765\u9a8c\u8bc1\u6267\u884c\uff1a<\/p>\n

$ silent_command && echo \"\u547d\u4ee4\u6210\u529f\u6267\u884c\" || echo \"\u547d\u4ee4\u6267\u884c\u5931\u8d25\"<\/code><\/pre>\n
4. \u4f7f\u7528Strace\u6df1\u5165\u5206\u6790<\/h3>\n
\u5bf9\u4e8e\u6df1\u5ea6\u8c03\u8bd5\uff0c\u4f7f\u7528strace<\/code>\u8ddf\u8e2a\u7cfb\u7edf\u8c03\u7528\uff1a<\/p>\n
$ strace -e trace=write silent_command<\/code><\/pre>\n
   [\/vc_column_text][\/vc_column][\/vc_row][vc_row el_class=”blog-detail-section”][vc_column][vc_column_text]   <\/p>\n
\u9999\u6e2f\u670d\u52a1\u5668\u7279\u6027\uff1a\u5e94\u5bf9\u672c\u5730\u6311\u6218<\/strong><\/h2>\n
\u5728\u9999\u6e2f\u670d\u52a1\u5668\u4e0a\u6392\u67e5\u9759\u9ed8\u547d\u4ee4\u6545\u969c\u65f6\uff0c\u8bf7\u8003\u8651\u8fd9\u4e9b\u72ec\u7279\u56e0\u7d20\uff1a<\/p>\n
\u7f51\u7edc\u5ef6\u8fdf<\/h3>\n
\u9ad8\u5ef6\u8fdf\u6709\u65f6\u4f1a\u5bfc\u81f4\u547d\u4ee4\u8f93\u51fa\u5ef6\u8fdf\u3002\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u6d4b\u8bd5\uff1a<\/p>\n
$ time curl -s https:\/\/www.example.com > \/dev\/null<\/code><\/pre>\n
\u5b57\u7b26\u7f16\u7801<\/h3>\n
\u591a\u8bed\u8a00\u73af\u5883\u53ef\u80fd\u9762\u4e34\u7f16\u7801\u95ee\u9898\u3002\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u9a8c\u8bc1\uff1a<\/p>\n
$ locale\r\n$ echo $LANG<\/code><\/pre>\n
\u5b89\u5168\u9650\u5236<\/h3>\n
\u4e00\u4e9b\u9999\u6e2f\u670d\u52a1\u5668\u6258\u7ba1\u8bbe\u65bd\u5b9e\u65bd\u4e25\u683c\u7684\u5b89\u5168\u7b56\u7565\u3002\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u68c0\u67e5\uff1a<\/p>\n
$ sestatus\r\n$ getenforce<\/code><\/pre>\n
   [\/vc_column_text][\/vc_column][\/vc_row][vc_row el_class=”blog-detail-section”][vc_column][vc_column_text]   <\/p>\n
\u63d0\u5347\u6280\u80fd\uff1a\u547d\u4ee4\u884c\u5fcd\u8005\u7684\u6700\u4f73\u5b9e\u8df5<\/strong><\/h2>\n
\u5c06\u8fd9\u4e9b\u6280\u5de7\u7eb3\u5165\u4f60\u7684Linux\u6280\u80fd\u4e2d\uff1a<\/p>\n
1. \u56de\u58f0\u5b9a\u4f4d<\/h3>\n
\u5728\u4f60\u7684\u811a\u672c\u4e2d\u5927\u91cf\u4f7f\u7528echo\u8bed\u53e5\uff1a<\/p>\n
#!\/bin\/bash\r\necho \"\u5f00\u59cb\u64cd\u4f5c...\"\r\nsilent_command\r\necho \"\u64cd\u4f5c\u5b8c\u6210\u3002\"<\/code><\/pre>\n
2. Set -x \u9b54\u6cd5<\/h3>\n
\u4f7f\u7528set -x<\/code>\u542f\u7528bash\u8c03\u8bd5\uff1a<\/p>\n
#!\/bin\/bash\r\nset -x\r\nsilent_command\r\nset +x<\/code><\/pre>\n
3. \u6355\u83b7\u90a3\u4e9b\u9519\u8bef<\/h3>\n
\u5728\u4f60\u7684\u811a\u672c\u4e2d\u5b9e\u73b0\u9519\u8bef\u6355\u83b7\uff1a<\/p>\n
#!\/bin\/bash\r\ntrap 'echo \"\u5728\u7b2c $LINENO \u884c\u53d1\u751f\u9519\u8bef\"; exit 1' ERR\r\nsilent_command<\/code><\/pre>\n
   [\/vc_column_text][\/vc_column][\/vc_row][vc_row el_class=”blog-detail-section”][vc_column][vc_column_text]   <\/p>\n
\u7ed3\u8bba<\/strong><\/h2>\n
\u7406\u89e3\u548c\u6392\u67e5\u9759\u9ed8Linux\u547d\u4ee4\u662f\u4efb\u4f55\u9999\u6e2f\u670d\u52a1\u5668\u7ba1\u7406\u5458\u7684\u5fc5\u5907\u6280\u80fd\u3002\u901a\u8fc7\u8fd0\u7528\u672c\u6307\u5357\u4e2d\u6982\u8ff0\u7684\u6280\u5de7\uff0c\u4f60\u5c06\u80fd\u591f\u5f88\u597d\u5730\u89e3\u7801\u6c89\u9ed8\u5e76\u4fdd\u6301\u6700\u4f73\u670d\u52a1\u5668\u6027\u80fd\u3002\u8bf7\u8bb0\u4f4f\uff0c\u5728Linux\u4e16\u754c\u4e2d\uff0c\u6c89\u9ed8\u5e76\u4e0d\u603b\u662f\u91d1\u5b50 – \u4f46\u5b83\u603b\u662f\u63d0\u5347\u8c03\u8bd5\u6280\u80fd\u7684\u673a\u4f1a\u3002<\/p>\n
   [\/vc_column_text][\/vc_column][\/vc_row][vc_row el_class=”blog-detail-section”][vc_column][vc_column_text]   <\/p>\n
\u5e38\u89c1\u95ee\u9898\u89e3\u7b54\uff1a\u89e3\u51b3\u4f60\u7684\u547d\u4ee4\u884c\u7591\u8651<\/strong><\/h2>\n
\n
\n            \u95ee\uff1a\u4e3a\u4ec0\u4e48’ls’\u547d\u4ee4\u9ed8\u8ba4\u4e0d\u663e\u793a\u9690\u85cf\u6587\u4ef6\uff1f<\/strong>
\n            \u7b54\uff1aLinux\u4e2d\u7684\u9690\u85cf\u6587\u4ef6\u4ee5\u70b9(.)\u5f00\u5934\uff0c\u6709\u610f\u4ece\u6807\u51c6’ls’\u8f93\u51fa\u4e2d\u6392\u9664\u3002\u4f7f\u7528’ls -a’\u53ef\u4ee5\u67e5\u770b\u6240\u6709\u6587\u4ef6\uff0c\u5305\u62ec\u9690\u85cf\u6587\u4ef6\u3002\n        <\/li>\n
\n            \u95ee\uff1a\u5982\u4f55\u8ba9\u901a\u5e38\u9759\u9ed8\u7684\u547d\u4ee4\u66f4\u8be6\u7ec6\uff1f<\/strong>
\n            \u7b54\uff1a\u8bb8\u591a\u547d\u4ee4\u63d0\u4f9b\u5982-v\uff08\u8be6\u7ec6\uff09\u6216-x\uff08\u8c03\u8bd5\uff09\u7b49\u6807\u5fd7\u3002\u67e5\u9605\u547d\u4ee4\u7684man\u9875\u9762\u4ee5\u83b7\u53d6\u5177\u4f53\u9009\u9879\u3002\n        <\/li>\n
\n            \u95ee\uff1a\u6709\u6ca1\u6709\u9999\u6e2f\u7279\u6709\u7684Linux\u670d\u52a1\u5668\u7ba1\u7406\u8d44\u6e90\uff1f<\/strong>
\n            \u7b54\uff1a\u67e5\u770b\u672c\u5730\u6280\u672f\u793e\u533a\u548c\u8bba\u575b\uff0c\u5982\u9999\u6e2fLinux\u7528\u6237\u7ec4\uff08HKLUG\uff09\uff0c\u83b7\u53d6\u5730\u533a\u7279\u5b9a\u5efa\u8bae\u548c\u7f51\u7edc\u673a\u4f1a\u3002\n        <\/li>\n<\/ol>\n
\u901a\u8fc7\u638c\u63e1\u8fd9\u4e9bLinux\u547d\u4ee4\u884c\u6545\u969c\u6392\u9664\u6280\u5de7\uff0c\u4f60\u5c06\u628a\u4f60\u7684\u9999\u6e2f\u670d\u52a1\u5668\u79df\u7528\u6e38\u620f\u63d0\u5347\u5230\u65b0\u7684\u9ad8\u5ea6\u3002\u8bb0\u4f4f\uff0c\u5728\u547d\u4ee4\u884c\u64cd\u4f5c\u7684\u9759\u9ed8\u4e16\u754c\u4e2d\uff0c\u4f60\u7684\u8c03\u8bd5\u6280\u80fd\u662f\u4f60\u6700\u5f3a\u5927\u7684\u5de5\u5177\u3002\u7ee7\u7eed\u63a2\u7d22\uff0c\u7ee7\u7eed\u5b66\u4e60\uff0c\u613f\u4f60\u7684\u670d\u52a1\u5668\u6c38\u8fdc\u8fd0\u884c\u987a\u7545\uff01<\/p>\n
[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"
[vc_row el_class=”blog-detail-section”][vc_column][vc_column_text] \u5728\u9999\u6e2f\u670d\u52a1\u5668\u79df\u7528\u9886\u57df\uff0c\u638c\u63e1Linux\u547d\u4ee4\u884c\u64cd\u4f5c\u81f3\u5173\u91cd\u8981\u3002\u7136\u800c\uff0c\u5373\u4f7f\u662f\u7ecf\u9a8c\u4e30\u5bcc\u7684\u7cfb\u7edf\u7ba1\u7406\u5458\u5076\u5c14\u4e5f\u4f1a\u9047\u5230\u4e00\u4e2a\u4ee4\u4eba\u56f0\u60d1\u7684\u60c5\u51b5\uff1aLinux\u547d\u4ee4\u6267\u884c\u65f6\u6ca1\u6709\u663e\u793a\u4efb\u4f55\u8f93\u51fa\u3002\u8fd9\u79cd\u6c89\u9ed8\u53ef\u80fd\u4ee4\u4eba\u4e0d\u5b89\uff0c\u5c24\u5176\u662f\u5728\u7ba1\u7406\u5173\u952e\u57fa\u7840\u8bbe\u65bd\u65f6\u3002\u8ba9\u6211\u4eec\u6df1\u5165\u63a2\u8ba8\u8fd9\u4e2a\u547d\u4ee4\u884c\u96be\u9898\uff0c\u5e76\u63a2\u7d22\u6709\u6548\u7684\u6545\u969c\u6392\u9664\u7b56\u7565\u3002 [\/vc_column_text][\/vc_column][\/vc_row][vc_row el_class=”blog-detail-section”][vc_column][vc_column_text] \u9759\u9ed8\u5904\u7406\uff1a\u5f53\u547d\u4ee4\u53d8\u5f97\u6c89\u9ed8 \u5728\u6211\u4eec\u5256\u6790\u547d\u4ee4\u9759\u9ed8\u7684\u539f\u56e0\u4e4b\u524d\uff0c\u91cd\u8981\u7684\u662f\u8981\u8ba4\u8bc6\u5230\u5e76\u975e\u6240\u6709\u7684\u5b89\u9759\u6267\u884c\u90fd\u8868\u793a\u5931\u8d25\u3002\u8bb8\u591aLinux\u547d\u4ee4\uff0c\u7279\u522b\u662f\u90a3\u4e9b\u8bbe\u8ba1\u7528\u4e8e\u6587\u4ef6\u64cd\u4f5c\u6216\u540e\u53f0\u8fdb\u7a0b\u7684\u547d\u4ee4\uff0c\u5728\u6210\u529f\u65f6\u6709\u610f\u5730\u9759\u9ed8\u8fd0\u884c\u3002\u7136\u800c\uff0c\u533a\u5206\u6709\u610f\u7684\u6c89\u9ed8\u548c\u6f5c\u5728\u95ee\u9898\u9700\u8981\u5bf9\u547d\u4ee4\u884c\u4e3a\u6709\u7ec6\u81f4\u7684\u7406\u89e3\u3002 [\/vc_column_text][\/vc_column][\/vc_row][vc_row el_class=”blog-detail-section”][vc_column][vc_column_text] \u89e3\u7801\u6c89\u9ed8\uff1a\u5e38\u89c1\u539f\u56e0 \u51e0\u4e2a\u56e0\u7d20\u53ef\u80fd\u5bfc\u81f4\u547d\u4ee4\u8f93\u51fa\u7684\u7f3a\u5931\uff1a \u8bbe\u8ba1\u4e3a\u9759\u9ed8\uff1a\u50cfcp\u3001mv\u548cmkdir\u8fd9\u6837\u7684\u547d\u4ee4\u901a\u5e38\u4e0d\u4f1a\u4ea7\u751f\u8f93\u51fa\uff0c\u9664\u975e\u53d1\u751f\u9519\u8bef\u3002 \u8f93\u51fa\u91cd\u5b9a\u5411\uff1a\u547d\u4ee4\u7684\u8f93\u51fa\u53ef\u80fd\u88ab\u91cd\u5b9a\u5411\u5230\u6587\u4ef6\u6216\u901a\u8fc7\u7ba1\u9053\u4f20\u9012\u7ed9\u53e6\u4e00\u4e2a\u8fdb\u7a0b\u3002 \u6743\u9650\u4e0d\u8db3\uff1a\u7f3a\u4e4f\u5fc5\u8981\u7684\u6743\u9650\u53ef\u80fd\u4f1a\u963b\u6b62\u547d\u4ee4\u6267\u884c\u6216\u8f93\u51fa\u663e\u793a\u3002 \u73af\u5883\u53d8\u91cf\uff1a\u9519\u8bef\u8bbe\u7f6e\u7684\u53d8\u91cf\u53ef\u80fd\u5f71\u54cd\u547d\u4ee4\u884c\u4e3a\u3002 \u8d44\u6e90\u9650\u5236\uff1a\u7cfb\u7edf\u8d44\u6e90\u9650\u5236\u53ef\u80fd\u5f71\u54cd\u547d\u4ee4\u6267\u884c\u3002 [\/vc_column_text][\/vc_column][\/vc_row][vc_row el_class=”blog-detail-section”][vc_column][vc_column_text] \u4fa6\u63a2\u5de5\u4f5c\uff1a\u63ed\u5f00\u9759\u9ed8\u547d\u4ee4\u7684\u9762\u7eb1 \u8981\u89e3\u5f00\u9759\u9ed8\u547d\u4ee4\u7684\u8c1c\u56e2\uff0c\u8bf7\u4f7f\u7528\u8fd9\u4e9b\u8c03\u8bd5\u6280\u5de7\uff1a 1. \u6fc0\u6d3b\u8be6\u7ec6\u6a21\u5f0f \u8bb8\u591a\u547d\u4ee4\u63d0\u4f9b\u8be6\u7ec6\u6216\u8c03\u8bd5\u6a21\u5f0f\u3002\u4f8b\u5982\uff1a $ cp -v source_file destination_file ‘source_file’ -> ‘destination_file’ 2. \u9519\u8bef\u91cd\u5b9a\u5411 \u901a\u8fc7\u91cd\u5b9a\u5411stderr\u6765\u6355\u83b7\u6f5c\u5728\u7684\u9519\u8bef\u6d88\u606f\uff1a $ some_command 2> error.log $ cat error.log 3. \u547d\u4ee4\u94fe\u63a5 \u4f7f\u7528\u547d\u4ee4\u94fe\u63a5\u6765\u9a8c\u8bc1\u6267\u884c\uff1a $ silent_command && echo “\u547d\u4ee4\u6210\u529f\u6267\u884c” || echo “\u547d\u4ee4\u6267\u884c\u5931\u8d25” 4. \u4f7f\u7528Strace\u6df1\u5165\u5206\u6790 \u5bf9\u4e8e\u6df1\u5ea6\u8c03\u8bd5\uff0c\u4f7f\u7528strace\u8ddf\u8e2a\u7cfb\u7edf\u8c03\u7528\uff1a […]<\/p>\n
Read More…<\/a><\/p>\n","protected":false},"author":3,"featured_media":16954,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[62],"tags":[3936,3935,3937,3646,265],"class_list":["post-16959","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hong-kong-dedicated-server-sc","tag-silent-execution-sc","tag-command-line-troubleshooting-sc","tag-debugging-techniques-sc","tag-linux-commands-sc","tag-265"],"acf":[],"yoast_head":"\n