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Linux常用命令之文件处理!!(二)

  • 2026-03-28 15:43:36
Linux常用命令之文件处理!!(二)

继上一篇基础命令后,今天带来文件处理的进阶四件套,每一个都是运维老手的压箱底技能。

大家好,我是你们的老朋友。

上篇我们聊了 lscpmvrm 这些文件管理的基本功。今天继续“文件处理(二)”,聚焦权限管理、文件隐藏属性、批量命令处理这几个高频场景。

掌握这 4 个命令,你的 Linux 操作水平又能提升一个档次。

1. chown —— 换主人,一句话的事

语法chown [选项] 用户[:组] 文件/目录

常用玩法

  • chown zhangsan file.txt:把 file.txt 的所有者改成 zhangsan

  • chown zhangsan:dev file.txt:同时修改所有者和所属组

  • chown -R zhangsan /data:递归修改 /data 目录下所有文件和子目录的所有者

小提示chown 只有 root 或具备相应权限的用户才能执行。如果你忘了加 -R,只改了目录本身,里面的文件还是原主人的,容易出问题。


2. chattr —— 给文件上“隐形锁”

语法chattr [选项] [模式] 文件

这个命令用来设置文件的隐藏属性,比普通权限更底层,root 也得遵守。

常用玩法

  • chattr +i file.txt:给 file.txt 加上不可修改属性(连 root 都不能删、改)

  • chattr -i file.txt:去掉不可修改属性

  • chattr +a log.txt:设置只追加属性,只能往文件里加内容,不能删除或覆盖

  • chattr -R +i /data:递归给 /data 目录下的所有文件加锁

真实场景:防止重要配置文件被误删、防止日志被篡改,用 chattr +i 上一道保险。


3. lsattr —— 看锁,一清二楚

语法lsattr [选项] 文件/目录

常用玩法

  • lsattr file.txt:查看 file.txt 的隐藏属性

  • lsattr -R /data:递归查看 /data 目录下所有文件的隐藏属性

组合技:先用 lsattr 确认文件是否被锁,再用 chattr 解锁或加锁。很多“删不掉”的文件,就是因为被 +i 了。

4. xargs —— 批量处理的“管道加速器”

语法command | xargs [选项] [命令]

xargs 不是直接操作文件,而是把前一个命令的输出,变成下一个命令的参数,尤其适合批量操作。

常用玩法

  • find . -name "*.log" | xargs rm:找到所有 .log 文件并删除

  • cat filelist.txt | xargs -I {} cp {} /backup/:逐行读取 filelist.txt,把每一行作为源文件复制到 /backup

  • echo "file1 file2 file3" | xargs -n1:每行只传一个参数,避免参数过长

为什么用它:有些命令不支持直接接收管道数据(比如 rm),用 xargs 就能完美解决。配合 find 使用,堪称批量删除、批量移动的神器。

写在最后

今天这四个命令,chown 管归属,chattr 管隐藏属性,lsattr 是它的侦察兵,xargs 则让你批量化操作如丝般顺滑。

它们不像 lscd 那样每天见面,但一旦遇到权限错乱、文件删不掉、批量处理的需求,你会发现它们就是救火队员。

如果你还没用过 chattr 或 xargs,建议马上找个测试机试试,感受一下“原来还能这样”的惊喜。

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  1. CONNECT:[ UseTime:0.000600s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000700s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.004689s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.031255s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000570s ]
  6. SELECT * FROM `set` [ RunTime:0.004622s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001854s ]
  8. SELECT * FROM `article` WHERE `id` = 483591 LIMIT 1 [ RunTime:0.065365s ]
  9. UPDATE `article` SET `lasttime` = 1774699142 WHERE `id` = 483591 [ RunTime:0.002590s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 67 LIMIT 1 [ RunTime:0.004370s ]
  11. SELECT * FROM `article` WHERE `id` < 483591 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.040543s ]
  12. SELECT * FROM `article` WHERE `id` > 483591 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.045845s ]
  13. SELECT * FROM `article` WHERE `id` < 483591 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.077632s ]
  14. SELECT * FROM `article` WHERE `id` < 483591 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.032436s ]
  15. SELECT * FROM `article` WHERE `id` < 483591 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.004917s ]
0.457519s