{"id":1334,"date":"2025-01-19T21:25:05","date_gmt":"2025-01-19T13:25:05","guid":{"rendered":"http:\/\/gzxingyu.cloud\/?p=1334"},"modified":"2025-01-19T21:25:07","modified_gmt":"2025-01-19T13:25:07","slug":"03-linux%e6%96%87%e4%bb%b6%e6%8f%8f%e8%bf%b0%e7%ac%a6%e6%93%8d%e4%bd%9c","status":"publish","type":"post","link":"http:\/\/gzxingyu.cloud\/index.php\/2025\/01\/19\/03-linux%e6%96%87%e4%bb%b6%e6%8f%8f%e8%bf%b0%e7%ac%a6%e6%93%8d%e4%bd%9c\/","title":{"rendered":"03.Linux\u6587\u4ef6\u63cf\u8ff0\u7b26\u64cd\u4f5c"},"content":{"rendered":"

\u4e00\u3001\u66f4\u6539\u6807\u51c6\u8f93\u51fa\u7684\u4f4d\u7f6e<\/h3>\n

\u628a\u6807\u51c6\u8f93\u51fa\u4f4d\u7f6e\u66f4\u6539\u5230test\u6587\u4ef6\u4e2d\uff1a<\/p>\n

exec 1> test\n<\/code><\/pre>\n
\u628a\u5f53\u524d\u6807\u51c6\u8f93\u51fa\u91cd\u5b9a\u5411\u5230test\u6587\u4ef6\u4e2d\uff1a<\/p>\n
\u279c ~ \u279c  echo 'lst' 1> test\n\u279c ~ \u279c  cat test\nlst\n<\/code><\/pre>\n
\u4e8c\u3001\u66f4\u6539\u6807\u51c6\u8f93\u5165\u7684\u4f4d\u7f6e<\/h3>\n
\u4ece\u952e\u76d8\u8f93\u5165\uff0c\u628a\u8f93\u5165\u8bfb\u5165user==\u53d8\u91cf==<\/p>\n
\u279c ~ \u279c  read user\ntesttest\n\u279c ~ \u279c  echo $user\ntesttest\n<\/code><\/pre>\n
\u628atest\u6587\u4ef6\u4e2d\u7684\u5185\u5bb9\u91cd\u5b9a\u5411\u5230\u6807\u51c6\u8f93\u5165\uff1a<\/p>\n
\u279c ~ \u279c  read user 0< test\n\u279c ~ \u279c  echo $user\nlst\n\/\/\u5c06test\u91cc\u7684\u5185\u5bb9\u91cd\u5b9a\u5411\u5230\u53d8\u91cfuser\n<\/code><\/pre>\n
\"Pasted<\/p>\n
\u6807\u51c6\u9519\u8bef\u8f93\u51fa\u548c\u6807\u51c6\u8f93\u51fa\u7684\u533a\u522b\u662f\uff0c\u5b83\u5728\u547d\u4ee4\u51fa\u9519\u60c5\u51b5\u4e0b\u7684\u8f93\u51fa\u3002<\/p>\n
exec 2> test\n<\/code><\/pre>\n
\u4e09\u3001\u521b\u5efa\u6587\u4ef6\u63cf\u8ff0\u7b26<\/h3>\n
    \n
  • \u521b\u5efa<\/li>\n<\/ul>\n
    exec \u6587\u4ef6\u63cf\u8ff0\u7b26 <> \u6587\u4ef6\u540d\n<\/code><\/pre>\n
      \n
    • \u8c03\u7528<\/li>\n<\/ul>\n
      & \u6587\u4ef6\u63cf\u8ff0\u7b26\n<\/code><\/pre>\n
        \n
      • \u5173\u95ed<\/li>\n<\/ul>\n
        exec \u6587\u4ef6\u63cf\u8ff0\u7b26<&-\n\n\u6216\n\nexec \u6587\u4ef6\u63cf\u8ff0\u7b26>&-\n<\/code><\/pre>\n
          \n
        • \u4f8b\u5b50<\/li>\n<\/ul>\n
          \u279c ~ \u279c  exec 5> test\n\u279c ~ \u279c  echo 'are you ok?' 1>&5\n\u279c ~ \u279c  cat test\nare you ok?\n<\/code><\/pre>\n
          \u628a\u6587\u4ef6\u63cf\u8ff0\u7b26 5 \u6307\u5411test\u6587\u4ef6\uff0c\u7136\u540e\u628a\u5f53\u524d\u8f93\u51fa\u91cd\u5b9a\u5411\u5230\u6587\u4ef6\u63cf\u8ff0\u7b265\uff08\u7528&\u5f15\u7528\u6587\u4ef6\u63cf\u8ff0\u7b26\uff0c\u5373\u627e \u5230\u6587\u4ef6\u63cf\u8ff0\u7b26\u6307\u5411\u7684\u76ee\u6807\u6587\u4ef6\uff09<\/p>\n
          \u56db\u3001\/dev\/null<\/h3>\n
          \u7279\u6b8a\u6587\u4ef6\uff0c\u5199\u5165\u7684\u4efb\u4f55\u4e1c\u897f\u90fd\u4f1a\u88ab\u6e05\u7a7a\u3002<\/p>\n
            \n
          1. \u628a\u6807\u51c6\u9519\u8bef\u8f93\u51fa\u91cd\u5b9a\u5411\u5230\/dev\/null\uff0c\u4ece\u800c\u4e22\u6389\u4e0d\u60f3\u4fdd\u5b58\u7684\u9519\u8bef\u4fe1\u606f<\/li>\n<\/ol>\n
            whoami 2>\/dev\/null\n<\/code><\/pre>\n
              \n
            1. \u5feb\u901f\u79fb\u9664\u6587\u4ef6\u4e2d\u7684\u6570\u636e\u800c\u4e0d\u7528\u5220\u9664\u6587\u4ef6<\/li>\n<\/ol>\n
              cat \/dev\/null > test\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
              \u4e00\u3001\u66f4\u6539\u6807\u51c6\u8f93\u51fa\u7684\u4f4d\u7f6e \u628a\u6807\u51c6\u8f93\u51fa\u4f4d\u7f6e\u66f4\u6539\u5230test\u6587\u4ef6\u4e2d\uff1a exec 1> test \u628a\u5f53\u524d\u6807\u51c6\u8f93\u51fa\u91cd […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[48,9],"tags":[],"class_list":["post-1334","post","type-post","status-publish","format-standard","hentry","category-linuxshell","category-9"],"_links":{"self":[{"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/posts\/1334","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/comments?post=1334"}],"version-history":[{"count":1,"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/posts\/1334\/revisions"}],"predecessor-version":[{"id":1335,"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/posts\/1334\/revisions\/1335"}],"wp:attachment":[{"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/media?parent=1334"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/categories?post=1334"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/tags?post=1334"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}