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一图看懂 Linux 权限类型

  • 2026-08-18 23:11:41
一图看懂 Linux 权限类型

一图看懂 Linux 权限类型


在 Linux 中，很多问题最终都会指向一句熟悉的报错：

Permission denied

为什么 root 可以访问，而普通用户却不行？为什么同一个文件，有的人能修改，有的人只能查看？为什么明明已经赋予了 777 权限，却依然无法访问？

这些问题，都离不开 Linux 权限类型。

Linux 的权限体系不仅仅是 rwx 三个字母，它还包括 用户（User）、用户组（Group）、其他用户（Others）、特殊权限（SUID/SGID/Sticky Bit）、ACL 以及 SELinux 等多个层面的控制机制，共同保障系统的安全性和稳定性。

这张图从基础到进阶，帮你一次性掌握 Linux 权限类型的核心知识。

📌 图中包含：

✅ Linux 权限体系概览

✅ rwx 权限详解（Read / Write / Execute）

✅ chmod 数字权限（755、644、700 等）

✅ 文件权限与目录权限的区别

✅ Owner、Group、Others 权限模型

✅ chown、chgrp 常用命令

✅ 特殊权限（SUID、SGID、Sticky Bit）

✅ ACL 访问控制列表

✅ SELinux 权限机制

✅ Linux 权限检查流程

✅ 常用权限管理命令速查

理解 Linux 权限类型，不仅能够快速解决 Permission denied、文件无法访问、脚本无法执行等常见问题，还能帮助你更好地管理服务器、保障系统安全，并为学习 Docker、Kubernetes、OpenShift 等云原生技术打下扎实基础。

无论你是 Linux 初学者、运维工程师、SRE、DevOps 工程师，还是正在备考 RHCSA/RHCE，这都是必须掌握的一项核心技能。

⭐ 建议收藏这张图，遇到权限问题时翻出来看一眼，很多问题都能迎刃而解。

💬 你在工作中遇到过哪些 Linux 权限问题？欢迎在评论区一起交流！

⸻

#Linux
#Linux权限
#Linux权限类型
#Linux运维
#Linux学习
#服务器运维
#DevOps
#SRE
#开源技术
#Linux技术社区

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  1. CONNECT:[ UseTime:0.000985s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001818s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000821s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.021650s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.002408s ]
  6. SELECT * FROM `set` [ RunTime:0.005116s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.002497s ]
  8. SELECT * FROM `article` WHERE `id` = 508709 LIMIT 1 [ RunTime:0.033135s ]
  9. UPDATE `article` SET `lasttime` = 1787309654 WHERE `id` = 508709 [ RunTime:0.024243s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 67 LIMIT 1 [ RunTime:0.001103s ]
  11. SELECT * FROM `article` WHERE `id` < 508709 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001894s ]
  12. SELECT * FROM `article` WHERE `id` > 508709 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.002493s ]
  13. SELECT * FROM `article` WHERE `id` < 508709 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.011129s ]
  14. SELECT * FROM `article` WHERE `id` < 508709 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.003712s ]
  15. SELECT * FROM `article` WHERE `id` < 508709 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002139s ]
0.214194s