{"id":17573,"date":"2024-11-18T10:16:02","date_gmt":"2024-11-18T02:16:02","guid":{"rendered":"https:\/\/fwq.ai\/blog\/17573\/"},"modified":"2024-11-18T10:16:02","modified_gmt":"2024-11-18T02:16:02","slug":"linux%e9%ab%98%e6%95%88%e5%88%a0%e9%99%a4%e6%96%87%e4%bb%b6%e5%b0%be%e9%83%a8%e5%86%85%e5%ae%b9%e6%93%8d%e4%bd%9c%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/17573\/","title":{"rendered":"Linux\u9ad8\u6548\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u5185\u5bb9\u64cd\u4f5c\u65b9\u6cd5"},"content":{"rendered":"

\"Linux\u9ad8\u6548\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u5185\u5bb9\u64cd\u4f5c\u65b9\u6cd5\u63d2\u56fe\"<\/p>\n

Linux \u662f\u4e00\u4e2a\u5f00\u6e90\u7684\u64cd\u4f5c\u7cfb\u7edf\uff0c\u5e7f\u6cdb\u7528\u4e8e\u670d\u52a1\u5668\u73af\u5883\u548c\u5f00\u53d1\u5de5\u4f5c\u4e2d\u3002\u5728\u65e5\u5e38\u4f7f\u7528 Linux \u8fc7\u7a0b\u4e2d\uff0c\u7ecf\u5e38\u4f1a\u9047\u5230\u9700\u8981\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u5185\u5bb9\u7684\u60c5\u51b5\uff0c\u6bd4\u5982\u6e05\u7a7a\u65e5\u5fd7\u6587\u4ef6\u3001\u53bb\u9664\u591a\u4f59\u7684\u6570\u636e\u7b49\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u5728 Linux \u4e2d\u9ad8\u6548\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u7684\u5185\u5bb9\uff0c\u540c\u65f6\u63d0\u4f9b\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n

\u5728 Linux \u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e9b\u547d\u4ee4\u548c\u6280\u5de7\u6765\u5b9e\u73b0\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u5185\u5bb9\u7684\u76ee\u7684\uff0c\u4e0b\u9762\u5c06\u4ecb\u7ecd\u4e24\u79cd\u5e38\u7528\u7684\u65b9\u6cd5\u3002<\/p>\n

\u65b9\u6cd5\u4e00\uff1a\u4f7f\u7528truncate\u547d\u4ee4<\/h3>\n

truncate\u547d\u4ee4\u53ef\u4ee5\u7528\u6765\u622a\u65ad\u6587\u4ef6\uff0c\u5e76\u4e14\u53ef\u4ee5\u901a\u8fc7–size\u53c2\u6570\u6765\u6307\u5b9a\u622a\u65ad\u7684\u5927\u5c0f\u3002\u6211\u4eec\u53ef\u4ee5\u5229\u7528\u8fd9\u4e2a\u7279\u6027\u6765\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u7684\u5185\u5bb9\u3002\u5177\u4f53\u64cd\u4f5c\u5982\u4e0b\uff1a<\/p>\n

    \n
  1. \u9996\u5148\uff0c\u4f7f\u7528cat\u547d\u4ee4\u67e5\u770b\u539f\u59cb\u6587\u4ef6\u7684\u5185\u5bb9\uff1a<\/li>\n<\/ol>\n
    cat file.txt<\/pre>\n
      \u767b\u5f55\u540e\u590d\u5236    \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
      \n
    1. \u7136\u540e\uff0c\u4f7f\u7528wc\u547d\u4ee4\u83b7\u53d6\u6587\u4ef6\u7684\u603b\u884c\u6570\uff1a<\/li>\n<\/ol>\n
      total_lines=$(wc -l <ol start=\"3\"><li>\u63a5\u7740\uff0c\u8ba1\u7b97\u9700\u8981\u4fdd\u7559\u7684\u884c\u6570\uff0c\u6bd4\u5982\u6211\u4eec\u60f3\u8981\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u7684 100 \u884c\uff1a<\/li><\/ol><pre class=\"brush:bash;toolbar:false;\">keep_lines=$((total_lines - 100))<\/pre>\n
        \u767b\u5f55\u540e\u590d\u5236    \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
        \n
      1. \u6700\u540e\uff0c\u4f7f\u7528truncate\u547d\u4ee4\u8fdb\u884c\u6587\u4ef6\u622a\u65ad\u64cd\u4f5c\uff1a<\/li>\n<\/ol>\n
        truncate -s $((keep_lines * 1)) file.txt<\/pre>\n
          \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
        \u901a\u8fc7\u4ee5\u4e0a\u6b65\u9aa4\uff0c\u6211\u4eec\u5c31\u6210\u529f\u5730\u5220\u9664\u4e86\u6587\u4ef6\u5c3e\u90e8\u6307\u5b9a\u884c\u6570\u7684\u5185\u5bb9\u3002<\/p>\n
        \u65b9\u6cd5\u4e8c\uff1a\u4f7f\u7528sed\u547d\u4ee4<\/h3>\n
        sed\u662f\u4e00\u79cd\u6d41\u5f0f\u6587\u672c\u7f16\u8f91\u5668\uff0c\u53ef\u4ee5\u5728\u6587\u672c\u4e2d\u8fdb\u884c\u5404\u79cd\u64cd\u4f5c\uff0c\u5305\u62ec\u5220\u9664\u884c\u7b49\u3002\u6211\u4eec\u53ef\u4ee5\u5229\u7528sed\u547d\u4ee4\u6765\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u7684\u5185\u5bb9\u3002\u5177\u4f53\u64cd\u4f5c\u5982\u4e0b\uff1a<\/p>\n
          \n
        1. \u9996\u5148\uff0c\u4f7f\u7528cat\u547d\u4ee4\u67e5\u770b\u539f\u59cb\u6587\u4ef6\u7684\u5185\u5bb9\uff1a<\/li>\n<\/ol>\n
          cat file.txt<\/pre>\n
            \u767b\u5f55\u540e\u590d\u5236    \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
            \n
          1. \u7136\u540e\uff0c\u4f7f\u7528wc\u547d\u4ee4\u83b7\u53d6\u6587\u4ef6\u7684\u603b\u884c\u6570\uff1a<\/li>\n<\/ol>\n
            total_lines=$(wc -l <ol start=\"3\"><li>\u63a5\u7740\uff0c\u8ba1\u7b97\u9700\u8981\u4fdd\u7559\u7684\u884c\u6570\uff0c\u6bd4\u5982\u6211\u4eec\u60f3\u8981\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u7684 100 \u884c\uff1a<\/li><\/ol><pre class=\"brush:bash;toolbar:false;\">keep_lines=$((total_lines - 100))<\/pre>\n
              \u767b\u5f55\u540e\u590d\u5236    \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
              \n
            1. \u6700\u540e\uff0c\u4f7f\u7528sed\u547d\u4ee4\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u7684\u5185\u5bb9\uff1a<\/li>\n<\/ol>\n
              sed -i \"${keep_lines},$ d\" file.txt<\/pre>\n
                \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
              \u901a\u8fc7\u4ee5\u4e0a\u6b65\u9aa4\uff0c\u6211\u4eec\u4e5f\u6210\u529f\u5730\u5220\u9664\u4e86\u6587\u4ef6\u5c3e\u90e8\u6307\u5b9a\u884c\u6570\u7684\u5185\u5bb9\u3002<\/p>\n
              \u7efc\u4e0a\u6240\u8ff0\uff0c\u672c\u6587\u4ecb\u7ecd\u4e86\u5728 Linux \u4e2d\u9ad8\u6548\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u5185\u5bb9\u7684\u64cd\u4f5c\u65b9\u6cd5\uff0c\u5e76\u63d0\u4f9b\u4e86\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u3002\u8bfb\u8005\u53ef\u4ee5\u6839\u636e\u5b9e\u9645\u9700\u6c42\u9009\u62e9\u9002\u5408\u7684\u65b9\u6cd5\u6765\u5b9e\u73b0\u6587\u4ef6\u5c3e\u90e8\u5185\u5bb9\u7684\u5220\u9664\u3002\u5e0c\u671b\u672c\u6587\u5bf9\u5927\u5bb6\u6709\u6240\u5e2e\u52a9\u3002<\/p>\n
              \u4ee5\u4e0a\u5c31\u662fLinux\u9ad8\u6548\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u5185\u5bb9\u64cd\u4f5c\u65b9\u6cd5\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
              Linux \u662f\u4e00\u4e2a\u5f00\u6e90\u7684\u64cd\u4f5c\u7cfb\u7edf\uff0c\u5e7f\u6cdb\u7528\u4e8e\u670d\u52a1\u5668\u73af\u5883\u548c\u5f00\u53d1\u5de5\u4f5c\u4e2d\u3002\u5728\u65e5\u5e38\u4f7f\u7528 Linux \u8fc7\u7a0b\u4e2d\uff0c\u7ecf\u5e38\u4f1a\u9047\u5230\u9700\u8981\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u5185\u5bb9\u7684\u60c5\u51b5\uff0c\u6bd4\u5982\u6e05\u7a7a\u65e5\u5fd7\u6587\u4ef6\u3001\u53bb\u9664\u591a\u4f59\u7684\u6570\u636e\u7b49\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u5728 Linux \u4e2d\u9ad8\u6548\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u7684\u5185\u5bb9\uff0c\u540c\u65f6\u63d0\u4f9b\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u3002 \u5728 Linux \u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e9b\u547d\u4ee4\u548c\u6280\u5de7\u6765\u5b9e\u73b0\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u5185\u5bb9\u7684\u76ee\u7684\uff0c\u4e0b\u9762\u5c06\u4ecb\u7ecd\u4e24\u79cd\u5e38\u7528\u7684\u65b9\u6cd5\u3002 \u65b9\u6cd5\u4e00\uff1a\u4f7f\u7528truncate\u547d\u4ee4 truncate\u547d\u4ee4\u53ef\u4ee5\u7528\u6765\u622a\u65ad\u6587\u4ef6\uff0c\u5e76\u4e14\u53ef\u4ee5\u901a\u8fc7–size\u53c2\u6570\u6765\u6307\u5b9a\u622a\u65ad\u7684\u5927\u5c0f\u3002\u6211\u4eec\u53ef\u4ee5\u5229\u7528\u8fd9\u4e2a\u7279\u6027\u6765\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u7684\u5185\u5bb9\u3002\u5177\u4f53\u64cd\u4f5c\u5982\u4e0b\uff1a \u9996\u5148\uff0c\u4f7f\u7528cat\u547d\u4ee4\u67e5\u770b\u539f\u59cb\u6587\u4ef6\u7684\u5185\u5bb9\uff1a cat file.txt \u767b\u5f55\u540e\u590d\u5236 \u767b\u5f55\u540e\u590d\u5236 \u7136\u540e\uff0c\u4f7f\u7528wc\u547d\u4ee4\u83b7\u53d6\u6587\u4ef6\u7684\u603b\u884c\u6570\uff1a total_lines=$(wc -l <ol start=”3″><li>\u63a5\u7740\uff0c\u8ba1\u7b97\u9700\u8981\u4fdd\u7559\u7684\u884c\u6570\uff0c\u6bd4\u5982\u6211\u4eec\u60f3\u8981\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u7684 100 \u884c\uff1a<\/li><\/ol><pre class=”brush:bash;toolbar:false;”>keep_lines=$((total_lines – 100)) \u767b\u5f55\u540e\u590d\u5236 \u767b\u5f55\u540e\u590d\u5236 \u6700\u540e\uff0c\u4f7f\u7528truncate\u547d\u4ee4\u8fdb\u884c\u6587\u4ef6\u622a\u65ad\u64cd\u4f5c\uff1a truncate -s $((keep_lines * 1)) file.txt \u767b\u5f55\u540e\u590d\u5236 \u901a\u8fc7\u4ee5\u4e0a\u6b65\u9aa4\uff0c\u6211\u4eec\u5c31\u6210\u529f\u5730\u5220\u9664\u4e86\u6587\u4ef6\u5c3e\u90e8\u6307\u5b9a\u884c\u6570\u7684\u5185\u5bb9\u3002 \u65b9\u6cd5\u4e8c\uff1a\u4f7f\u7528sed\u547d\u4ee4 sed\u662f\u4e00\u79cd\u6d41\u5f0f\u6587\u672c\u7f16\u8f91\u5668\uff0c\u53ef\u4ee5\u5728\u6587\u672c\u4e2d\u8fdb\u884c\u5404\u79cd\u64cd\u4f5c\uff0c\u5305\u62ec\u5220\u9664\u884c\u7b49\u3002\u6211\u4eec\u53ef\u4ee5\u5229\u7528sed\u547d\u4ee4\u6765\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u7684\u5185\u5bb9\u3002\u5177\u4f53\u64cd\u4f5c\u5982\u4e0b\uff1a \u9996\u5148\uff0c\u4f7f\u7528cat\u547d\u4ee4\u67e5\u770b\u539f\u59cb\u6587\u4ef6\u7684\u5185\u5bb9\uff1a cat file.txt \u767b\u5f55\u540e\u590d\u5236 \u767b\u5f55\u540e\u590d\u5236 \u7136\u540e\uff0c\u4f7f\u7528wc\u547d\u4ee4\u83b7\u53d6\u6587\u4ef6\u7684\u603b\u884c\u6570\uff1a total_lines=$(wc -l <ol start=”3″><li>\u63a5\u7740\uff0c\u8ba1\u7b97\u9700\u8981\u4fdd\u7559\u7684\u884c\u6570\uff0c\u6bd4\u5982\u6211\u4eec\u60f3\u8981\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u7684 100 \u884c\uff1a<\/li><\/ol><pre class=”brush:bash;toolbar:false;”>keep_lines=$((total_lines – 100)) \u767b\u5f55\u540e\u590d\u5236 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-17573","post","type-post","status-publish","format-standard","hentry","category-os"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/17573","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=17573"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/17573\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=17573"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=17573"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=17573"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}