3. \u6307\u4ee4\u93c8\u63a5<\/h3>\n

\u4f7f\u7528\u6307\u4ee4\u93c8\u63a5\u4f86\u9a57\u8b49\u57f7\u884c\uff1a<\/p>\n

$ silent_command && echo \"\u6307\u4ee4\u6210\u529f\u57f7\u884c\" || echo \"\u6307\u4ee4\u57f7\u884c\u5931\u6557\"<\/code><\/pre>\n
4. \u4f7f\u7528Strace\u6df1\u5165\u5206\u6790<\/h3>\n
\u5c0d\u65bc\u6df1\u5ea6\u5075\u932f\uff0c\u4f7f\u7528strace<\/code>\u8ffd\u8e64\u7cfb\u7d71\u547c\u53eb\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\u4f3a\u670d\u5668\u7279\u6027\uff1a\u61c9\u5c0d\u672c\u5730\u6311\u6230<\/strong><\/h2>\n
\u5728\u9999\u6e2f\u4f3a\u670d\u5668\u4e0a\u6392\u67e5\u975c\u9ed8\u6307\u4ee4\u6545\u969c\u6642\uff0c\u8acb\u8003\u616e\u9019\u4e9b\u7368\u7279\u56e0\u7d20\uff1a<\/p>\n
\u7db2\u8def\u5ef6\u9072<\/h3>\n
\u9ad8\u5ef6\u9072\u6709\u6642\u6703\u5c0e\u81f4\u6307\u4ee4\u8f38\u51fa\u5ef6\u9072\u3002\u4f7f\u7528\u4ee5\u4e0b\u6307\u4ee4\u6e2c\u8a66\uff1a<\/p>\n
$ time curl -s https:\/\/www.example.com > \/dev\/null<\/code><\/pre>\n
\u5b57\u5143\u7de8\u78bc<\/h3>\n
\u591a\u8a9e\u8a00\u74b0\u5883\u53ef\u80fd\u9762\u81e8\u7de8\u78bc\u554f\u984c\u3002\u4f7f\u7528\u4ee5\u4e0b\u6307\u4ee4\u9a57\u8b49\uff1a<\/p>\n
$ locale\r\n$ echo $LANG<\/code><\/pre>\n
\u5b89\u5168\u9650\u5236<\/h3>\n
\u4e00\u4e9b\u9999\u6e2f\u4f3a\u670d\u5668\u8a17\u7ba1\u8a2d\u65bd\u5be6\u65bd\u56b4\u683c\u7684\u5b89\u5168\u653f\u7b56\u3002\u4f7f\u7528\u4ee5\u4e0b\u6307\u4ee4\u6aa2\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\u5217\u5fcd\u8005\u7684\u6700\u4f73\u5be6\u8e10<\/strong><\/h2>\n
\u5c07\u9019\u4e9b\u6280\u5de7\u7d0d\u5165\u4f60\u7684Linux\u6280\u80fd\u4e2d\uff1a<\/p>\n
1. \u56de\u8072\u5b9a\u4f4d<\/h3>\n
\u5728\u4f60\u7684\u8173\u672c\u4e2d\u5927\u91cf\u4f7f\u7528echo\u9673\u8ff0\u53e5\uff1a<\/p>\n
#!\/bin\/bash\r\necho \"\u958b\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>\u555f\u7528bash\u5075\u932f\uff1a<\/p>\n
#!\/bin\/bash\r\nset -x\r\nsilent_command\r\nset +x<\/code><\/pre>\n
3. \u6355\u7372\u90a3\u4e9b\u932f\u8aa4<\/h3>\n
\u5728\u4f60\u7684\u8173\u672c\u4e2d\u5be6\u73fe\u932f\u8aa4\u6355\u7372\uff1a<\/p>\n
#!\/bin\/bash\r\ntrap '\u5728\u7b2c $LINENO \u884c\u767c\u751f\u932f\u8aa4'; 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
\u7d50\u8ad6<\/strong><\/h2>\n
\u7406\u89e3\u548c\u6392\u67e5\u975c\u9ed8Linux\u6307\u4ee4\u662f\u4efb\u4f55\u9999\u6e2f\u4f3a\u670d\u5668\u7ba1\u7406\u54e1\u7684\u5fc5\u5099\u6280\u80fd\u3002\u901a\u904e\u904b\u7528\u672c\u6307\u5357\u4e2d\u6982\u8ff0\u7684\u6280\u5de7\uff0c\u4f60\u5c07\u80fd\u5920\u5f88\u597d\u5730\u89e3\u78bc\u6c89\u9ed8\u4e26\u4fdd\u6301\u6700\u4f73\u4f3a\u670d\u5668\u6548\u80fd\u3002\u8acb\u8a18\u4f4f\uff0c\u5728Linux\u4e16\u754c\u4e2d\uff0c\u6c89\u9ed8\u4e26\u4e0d\u7e3d\u662f\u91d1\u5b50 – \u4f46\u5b83\u7e3d\u662f\u63d0\u5347\u5075\u932f\u6280\u80fd\u7684\u6a5f\u6703\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\u898b\u554f\u984c\u89e3\u7b54\uff1a\u89e3\u6c7a\u4f60\u7684\u547d\u4ee4\u5217\u7591\u616e<\/strong><\/h2>\n
\n
\n            \u554f\uff1a\u70ba\u4ec0\u9ebc’ls’\u6307\u4ee4\u9810\u8a2d\u4e0d\u986f\u793a\u96b1\u85cf\u6a94\u6848\uff1f<\/strong>
\n            \u7b54\uff1aLinux\u4e2d\u7684\u96b1\u85cf\u6a94\u6848\u4ee5\u9ede(.)\u958b\u982d\uff0c\u6709\u610f\u5f9e\u6a19\u6e96’ls’\u8f38\u51fa\u4e2d\u6392\u9664\u3002\u4f7f\u7528’ls -a’\u53ef\u4ee5\u6aa2\u8996\u6240\u6709\u6a94\u6848\uff0c\u5305\u62ec\u96b1\u85cf\u6a94\u6848\u3002\n        <\/li>\n
\n            \u554f\uff1a\u5982\u4f55\u8b93\u901a\u5e38\u975c\u9ed8\u7684\u6307\u4ee4\u66f4\u8a73\u7d30\uff1f<\/strong>
\n            \u7b54\uff1a\u8a31\u591a\u6307\u4ee4\u63d0\u4f9b\u5982-v\uff08\u8a73\u7d30\uff09\u6216-x\uff08\u5075\u932f\uff09\u7b49\u6a19\u8a8c\u3002\u67e5\u95b1\u6307\u4ee4\u7684man\u9801\u9762\u4ee5\u7372\u53d6\u5177\u9ad4\u9078\u9805\u3002\n        <\/li>\n
\n            \u554f\uff1a\u6709\u6c92\u6709\u9999\u6e2f\u7279\u6709\u7684Linux\u4f3a\u670d\u5668\u7ba1\u7406\u8cc7\u6e90\uff1f<\/strong>
\n            \u7b54\uff1a\u67e5\u770b\u672c\u5730\u6280\u8853\u793e\u7fa4\u548c\u8ad6\u58c7\uff0c\u5982\u9999\u6e2fLinux\u4f7f\u7528\u8005\u7fa4\u7d44\uff08HKLUG\uff09\uff0c\u7372\u53d6\u5730\u5340\u7279\u5b9a\u5efa\u8b70\u548c\u7db2\u8def\u6a5f\u6703\u3002\n        <\/li>\n<\/ol>\n
\u901a\u904e\u638c\u63e1\u9019\u4e9bLinux\u547d\u4ee4\u5217\u6545\u969c\u6392\u9664\u6280\u5de7\uff0c\u4f60\u5c07\u628a\u4f60\u7684\u9999\u6e2f\u4f3a\u670d\u5668\u79df\u7528\u904a\u6232\u63d0\u5347\u5230\u65b0\u7684\u9ad8\u5ea6\u3002\u8a18\u4f4f\uff0c\u5728\u547d\u4ee4\u5217\u64cd\u4f5c\u7684\u975c\u9ed8\u4e16\u754c\u4e2d\uff0c\u4f60\u7684\u5075\u932f\u6280\u80fd\u662f\u4f60\u6700\u5f37\u5927\u7684\u5de5\u5177\u3002\u7e7c\u7e8c\u63a2\u7d22\uff0c\u7e7c\u7e8c\u5b78\u7fd2\uff0c\u9858\u4f60\u7684\u4f3a\u670d\u5668\u6c38\u9060\u904b\u884c\u9806\u66a2\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_ […]<\/p>\n
Read More…<\/a><\/p>\n","protected":false},"author":3,"featured_media":16953,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[61],"tags":[3932,3933,3934,3642,259],"class_list":["post-16958","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hong-kong-dedicated-server-tc","tag-command-line-troubleshooting-tc","tag-silent-execution-tc","tag-debugging-techniques-tc","tag-linux-commands-tc","tag-259"],"acf":[],"yoast_head":"\n