{"id":51500,"date":"2024-12-03T15:43:50","date_gmt":"2024-12-03T07:43:50","guid":{"rendered":"https:\/\/fwq.ai\/blog\/51500\/"},"modified":"2024-12-03T15:43:50","modified_gmt":"2024-12-03T07:43:50","slug":"%e5%af%b9linux%e6%96%87%e4%bb%b6%e8%bf%9b%e8%a1%8c%e5%b0%be%e9%83%a8%e6%95%b0%e6%8d%ae%e6%88%aa%e5%8f%96%e7%9a%84%e5%ae%9e%e7%94%a8%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/51500\/","title":{"rendered":"\u5bf9Linux\u6587\u4ef6\u8fdb\u884c\u5c3e\u90e8\u6570\u636e\u622a\u53d6\u7684\u5b9e\u7528\u65b9\u6cd5"},"content":{"rendered":"

<\/b> <\/p>\n

\u5bf9Linux\u6587\u4ef6\u8fdb\u884c\u5c3e\u90e8\u6570\u636e\u622a\u53d6\u7684\u5b9e\u7528\u65b9\u6cd5<\/h1>\n

\u6587\u7ae0\u5c0f\u767d\u4e00\u679a\uff0c\u6b63\u5728\u4e0d\u65ad\u5b66\u4e60\u79ef\u7d2f\u77e5\u8bc6\uff0c\u73b0\u5c06\u5b66\u4e60\u5230\u7684\u77e5\u8bc6\u8bb0\u5f55\u4e00\u4e0b\uff0c\u4e5f\u662f\u5c06\u6211\u7684\u6240\u5f97\u5206\u4eab\u7ed9\u5927\u5bb6\uff01\u800c\u4eca\u5929\u8fd9\u7bc7\u6587\u7ae0\u300a\u5bf9Linux\u6587\u4ef6\u8fdb\u884c\u5c3e\u90e8\u6570\u636e\u622a\u53d6\u7684\u5b9e\u7528\u65b9\u6cd5\u300b\u5e26\u5927\u5bb6\u6765\u4e86\u89e3\u4e00\u4e0b##content_title##\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u4ece\u800c\u5f25\u8865\u81ea\u5df1\u7684\u4e0d\u8db3\uff0c\u52a9\u529b\u5b9e\u6218\u5f00\u53d1\uff01<\/p>\n

<\/p>\n

\u6807\u9898\uff1aLinux\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u6570\u636e\u7684\u5b9e\u7528\u65b9\u6cd5<\/p>\n

\u5728Linux\u7cfb\u7edf\u4e2d\uff0c\u7ecf\u5e38\u4f1a\u9047\u5230\u9700\u8981\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u6570\u636e\u7684\u60c5\u51b5\uff0c\u7279\u522b\u662f\u5f53\u6587\u4ef6\u4e2d\u5b58\u5728\u4e00\u4e9b\u65e0\u6548\u6216\u4e0d\u9700\u8981\u7684\u6570\u636e\u65f6\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u51e0\u79cd\u5b9e\u7528\u7684\u65b9\u6cd5\u6765\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u6570\u636e\uff0c\u540c\u65f6\u63d0\u4f9b\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u5e2e\u52a9\u8bfb\u8005\u5feb\u901f\u5b9e\u65bd\u3002<\/p>\n

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

truncate\u662f\u4e00\u4e2a\u7528\u4e8e\u622a\u65ad\u6587\u4ef6\u5927\u5c0f\u7684\u547d\u4ee4\uff0c\u53ef\u4ee5\u5c06\u6587\u4ef6\u622a\u65ad\u5230\u7279\u5b9a\u957f\u5ea6\u3002\u901a\u8fc7\u6307\u5b9a\u8981\u622a\u65ad\u7684\u6587\u4ef6\u957f\u5ea6\uff0c\u53ef\u4ee5\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u7684\u6570\u636e\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n

# \u622a\u65ad\u6587\u4ef6\u5230\u6307\u5b9a\u957f\u5ea6\ntruncate -s -[\u5b57\u8282\u6570] [\u6587\u4ef6\u540d]<\/pre>\n
\u65b9\u6cd5\u4e8c\uff1a\u4f7f\u7528dd\u547d\u4ee4<\/h3>\n
dd\u547d\u4ee4\u5728Linux\u4e2d\u662f\u4e00\u4e2a\u975e\u5e38\u5f3a\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u7528\u6765\u62f7\u8d1d\u6587\u4ef6\u3001\u8f6c\u6362\u683c\u5f0f\u4ee5\u53ca\u622a\u53d6\u6587\u4ef6\u7b49\u3002\u901a\u8fc7dd\u547d\u4ee4\u53ef\u4ee5\u5b9e\u73b0\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u6570\u636e\u7684\u529f\u80fd\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n
# \u83b7\u53d6\u6587\u4ef6\u5927\u5c0f\nfilesize=$(stat -c \"%s\" [\u6587\u4ef6\u540d])\n\n# \u8ba1\u7b97\u5220\u9664\u7684\u5b57\u8282\u6570\ndelete_bytes=[\u8981\u5220\u9664\u7684\u5b57\u8282\u6570]\ntotal_bytes=$(($filesize - $delete_bytes))\n\n# \u4f7f\u7528dd\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u6570\u636e\ndd if=[\u6587\u4ef6\u540d] of=[\u65b0\u6587\u4ef6\u540d] bs=1 count=$total_bytes<\/pre>\n
\u65b9\u6cd5\u4e09\uff1a\u4f7f\u7528sed\u547d\u4ee4<\/h3>\n
sed\u662f\u4e00\u4e2a\u6d41\u7f16\u8f91\u5668\uff0c\u53ef\u4ee5\u7528\u6765\u5bf9\u6587\u672c\u8fdb\u884c\u66ff\u6362\u3001\u5220\u9664\u7b49\u64cd\u4f5c\u3002\u901a\u8fc7sed\u547d\u4ee4\u7ed3\u5408\u6b63\u5219\u8868\u8fbe\u5f0f\uff0c\u53ef\u4ee5\u5b9e\u73b0\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u6570\u636e\u7684\u76ee\u7684\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n
# \u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u6570\u636e\nsed -i '$d' [\u6587\u4ef6\u540d]<\/pre>\n
\u65b9\u6cd5\u56db\uff1a\u4f7f\u7528awk\u547d\u4ee4<\/h3>\n
awk\u662f\u4e00\u4e2a\u5f3a\u5927\u7684\u6587\u672c\u5904\u7406\u5de5\u5177\uff0c\u53ef\u4ee5\u7528\u6765\u63d0\u53d6\u548c\u5904\u7406\u6587\u672c\u5185\u5bb9\u3002\u901a\u8fc7awk\u547d\u4ee4\u53ef\u4ee5\u5b9e\u73b0\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u6570\u636e\u7684\u529f\u80fd\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n
# \u83b7\u53d6\u6587\u4ef6\u603b\u884c\u6570\nline_count=$(wc -l < [\u6587\u4ef6\u540d])\n\n# \u5220\u9664\u6700\u540e\u4e00\u884c\nhead -n $(($line_count - 1)) [\u6587\u4ef6\u540d] > [\u65b0\u6587\u4ef6\u540d]<\/pre>\n
\u7efc\u4e0a\u6240\u8ff0\uff0c\u672c\u6587\u4ecb\u7ecd\u4e86\u56db\u79cd\u5728Linux\u7cfb\u7edf\u4e2d\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u6570\u636e\u7684\u5b9e\u7528\u65b9\u6cd5\uff0c\u5305\u62ec\u4f7f\u7528truncate\u3001dd\u3001sed\u548cawk\u547d\u4ee4\u3002\u8bfb\u8005\u53ef\u4ee5\u6839\u636e\u81ea\u5df1\u7684\u9700\u6c42\u9009\u62e9\u9002\u5408\u7684\u65b9\u6cd5\uff0c\u540c\u65f6\u901a\u8fc7\u63d0\u4f9b\u7684\u4ee3\u7801\u793a\u4f8b\u8fdb\u884c\u5b9e\u9645\u64cd\u4f5c\u3002\u5e0c\u671b\u4ee5\u4e0a\u5185\u5bb9\u80fd\u591f\u5e2e\u52a9\u8bfb\u8005\u89e3\u51b3\u5b9e\u9645\u95ee\u9898\uff0c\u63d0\u9ad8\u5de5\u4f5c\u6548\u7387\u3002<\/p>\n
\u6587\u4e2d\u5173\u4e8eLinux,\u5220\u9664,\u5c3e\u90e8\u7684\u77e5\u8bc6\u4ecb\u7ecd\uff0c\u5e0c\u671b\u5bf9\u4f60\u7684\u5b66\u4e60\u6709\u6240\u5e2e\u52a9\uff01\u82e5\u662f\u53d7\u76ca\u532a\u6d45\uff0c\u90a3\u5c31\u52a8\u52a8\u9f20\u6807\u6536\u85cf\u8fd9\u7bc7\u300a\u5bf9Linux\u6587\u4ef6\u8fdb\u884c\u5c3e\u90e8\u6570\u636e\u622a\u53d6\u7684\u5b9e\u7528\u65b9\u6cd5\u300b\u6587\u7ae0\u5427\uff0c\u4e5f\u53ef\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\u4e86\u89e3\u76f8\u5173\u6280\u672f\u6587\u7ae0\u3002<\/p>\n
\n
<\/dt>\n
\n   \u5c06\u5b57\u7b26\u4e32\u201c\u62c6\u5206\u201d\u4e3a\u5355\u4e2a\u5b57\u7b26\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
\u5bf9Linux\u6587\u4ef6\u8fdb\u884c\u5c3e\u90e8\u6570\u636e\u622a\u53d6\u7684\u5b9e\u7528\u65b9\u6cd5 \u6587\u7ae0\u5c0f\u767d\u4e00\u679a\uff0c\u6b63\u5728\u4e0d\u65ad\u5b66\u4e60\u79ef\u7d2f\u77e5\u8bc6\uff0c\u73b0\u5c06\u5b66\u4e60\u5230\u7684\u77e5\u8bc6\u8bb0\u5f55\u4e00\u4e0b\uff0c\u4e5f\u662f\u5c06\u6211\u7684\u6240\u5f97\u5206\u4eab\u7ed9\u5927\u5bb6\uff01\u800c\u4eca\u5929\u8fd9\u7bc7\u6587\u7ae0\u300a\u5bf9Linux\u6587\u4ef6\u8fdb\u884c\u5c3e\u90e8\u6570\u636e\u622a\u53d6\u7684\u5b9e\u7528\u65b9\u6cd5\u300b\u5e26\u5927\u5bb6\u6765\u4e86\u89e3\u4e00\u4e0b##content_title##\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u4ece\u800c\u5f25\u8865\u81ea\u5df1\u7684\u4e0d\u8db3\uff0c\u52a9\u529b\u5b9e\u6218\u5f00\u53d1\uff01 \u6807\u9898\uff1aLinux\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u6570\u636e\u7684\u5b9e\u7528\u65b9\u6cd5 \u5728Linux\u7cfb\u7edf\u4e2d\uff0c\u7ecf\u5e38\u4f1a\u9047\u5230\u9700\u8981\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u6570\u636e\u7684\u60c5\u51b5\uff0c\u7279\u522b\u662f\u5f53\u6587\u4ef6\u4e2d\u5b58\u5728\u4e00\u4e9b\u65e0\u6548\u6216\u4e0d\u9700\u8981\u7684\u6570\u636e\u65f6\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u51e0\u79cd\u5b9e\u7528\u7684\u65b9\u6cd5\u6765\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u6570\u636e\uff0c\u540c\u65f6\u63d0\u4f9b\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u5e2e\u52a9\u8bfb\u8005\u5feb\u901f\u5b9e\u65bd\u3002 \u65b9\u6cd5\u4e00\uff1a\u4f7f\u7528truncate\u547d\u4ee4 truncate\u662f\u4e00\u4e2a\u7528\u4e8e\u622a\u65ad\u6587\u4ef6\u5927\u5c0f\u7684\u547d\u4ee4\uff0c\u53ef\u4ee5\u5c06\u6587\u4ef6\u622a\u65ad\u5230\u7279\u5b9a\u957f\u5ea6\u3002\u901a\u8fc7\u6307\u5b9a\u8981\u622a\u65ad\u7684\u6587\u4ef6\u957f\u5ea6\uff0c\u53ef\u4ee5\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u7684\u6570\u636e\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff1a # \u622a\u65ad\u6587\u4ef6\u5230\u6307\u5b9a\u957f\u5ea6 truncate -s -[\u5b57\u8282\u6570] [\u6587\u4ef6\u540d] \u65b9\u6cd5\u4e8c\uff1a\u4f7f\u7528dd\u547d\u4ee4 dd\u547d\u4ee4\u5728Linux\u4e2d\u662f\u4e00\u4e2a\u975e\u5e38\u5f3a\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u7528\u6765\u62f7\u8d1d\u6587\u4ef6\u3001\u8f6c\u6362\u683c\u5f0f\u4ee5\u53ca\u622a\u53d6\u6587\u4ef6\u7b49\u3002\u901a\u8fc7dd\u547d\u4ee4\u53ef\u4ee5\u5b9e\u73b0\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u6570\u636e\u7684\u529f\u80fd\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff1a # \u83b7\u53d6\u6587\u4ef6\u5927\u5c0f filesize=$(stat -c “%s” [\u6587\u4ef6\u540d]) # \u8ba1\u7b97\u5220\u9664\u7684\u5b57\u8282\u6570 delete_bytes=[\u8981\u5220\u9664\u7684\u5b57\u8282\u6570] total_bytes=$(($filesize – $delete_bytes)) # \u4f7f\u7528dd\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u6570\u636e dd if=[\u6587\u4ef6\u540d] of=[\u65b0\u6587\u4ef6\u540d] bs=1 count=$total_bytes \u65b9\u6cd5\u4e09\uff1a\u4f7f\u7528sed\u547d\u4ee4 sed\u662f\u4e00\u4e2a\u6d41\u7f16\u8f91\u5668\uff0c\u53ef\u4ee5\u7528\u6765\u5bf9\u6587\u672c\u8fdb\u884c\u66ff\u6362\u3001\u5220\u9664\u7b49\u64cd\u4f5c\u3002\u901a\u8fc7sed\u547d\u4ee4\u7ed3\u5408\u6b63\u5219\u8868\u8fbe\u5f0f\uff0c\u53ef\u4ee5\u5b9e\u73b0\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u6570\u636e\u7684\u76ee\u7684\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff1a # \u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u6570\u636e sed -i ‘$d’ [\u6587\u4ef6\u540d] \u65b9\u6cd5\u56db\uff1a\u4f7f\u7528awk\u547d\u4ee4 awk\u662f\u4e00\u4e2a\u5f3a\u5927\u7684\u6587\u672c\u5904\u7406\u5de5\u5177\uff0c\u53ef\u4ee5\u7528\u6765\u63d0\u53d6\u548c\u5904\u7406\u6587\u672c\u5185\u5bb9\u3002\u901a\u8fc7awk\u547d\u4ee4\u53ef\u4ee5\u5b9e\u73b0\u5220\u9664\u6587\u4ef6\u5c3e\u90e8\u6570\u636e\u7684\u529f\u80fd\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff1a # \u83b7\u53d6\u6587\u4ef6\u603b\u884c\u6570 line_count=$(wc -l < [\u6587\u4ef6\u540d]) # \u5220\u9664\u6700\u540e\u4e00\u884c head -n $(($line_count – […]<\/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-51500","post","type-post","status-publish","format-standard","hentry","category-os"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/51500","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=51500"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/51500\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=51500"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=51500"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=51500"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}