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Linux常见核心目录

  • 2026-08-18 23:11:43
Linux常见核心目录
linnux核心设计哲学:一切皆文件
linux是一个统一的树形结构，所有文件和目录的起点是根目录/:
一）系统核心目录
系统冷启动、运行的关键
/bin:基础工具箱，ls,cd,cp,grep,cat等基础命令，开机就可以用
/sbin:管理员命令，挂载分区这些，只有root用户可以用
/boot:内核文件、启动引导程序都在这，没/boot开不了机
/lib:系统核心库，给各类代码提供运行所需的支持，删除它系统直接瘫痪
/etc:配置中心，90%的系统配置、软件设置都在这里
二）用户相关目录
/home:用户家目录，每个用户自己的专属文件夹，可以存个人文件/代码/文档
/root:管理员家目录，root专属，权限最高，普通用户无法访问
/urs:系统最大的软件安装中心，相当于windows的Program Filer,大部分软件都会自动安装在这里
三）系统运行时动态变化的目录
/var:存动态数据，日志、数据库、缓存，运维排查问题经常用到
/tmp:临时文件目录，重启自动清空
/dev:设备文件目录，硬盘、鼠标这些硬件在这都对应着一个文件，操作这些文件就能和硬件交互
/proc:虚拟目录，不占硬盘空间，实时显示CPU、内存、进程状态
day12:linux文件管理-基础Linux命令（一）
day36:linux基础命令学习（二）
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  1. CONNECT:[ UseTime:0.000797s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001254s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.019556s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.008096s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001262s ]
  6. SELECT * FROM `set` [ RunTime:0.000501s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001328s ]
  8. SELECT * FROM `article` WHERE `id` = 508834 LIMIT 1 [ RunTime:0.000885s ]
  9. UPDATE `article` SET `lasttime` = 1787340514 WHERE `id` = 508834 [ RunTime:0.019664s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 67 LIMIT 1 [ RunTime:0.006756s ]
  11. SELECT * FROM `article` WHERE `id` < 508834 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001388s ]
  12. SELECT * FROM `article` WHERE `id` > 508834 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.002072s ]
  13. SELECT * FROM `article` WHERE `id` < 508834 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.010812s ]
  14. SELECT * FROM `article` WHERE `id` < 508834 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002392s ]
  15. SELECT * FROM `article` WHERE `id` < 508834 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.019109s ]
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