Linux权限管理命令

布满荆棘的人生 2022-11-09 12:34 188阅读 0赞

1.chmod:改变文件或者目录权限  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzU4NjcxMw_size_16_color_FFFFFF_t_70]  
手敲demo:1.chmod u+x a  
2.chmod u=r- - a  
3.chmod 777 a  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzU4NjcxMw_size_16_color_FFFFFF_t_70 1]  
实现递归修改文件或者目录的权限,采用的是 chmod -R + 数字 + 文件.即可将该文件和该文件目录下的所有文件权限统一修改.

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实现创建一个普通用户的命令:  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzU4NjcxMw_size_16_color_FFFFFF_t_70 2]  
对rwx三个权限的理解:  
对于file文件来说,r:cat/tac/more/less/head/tail w:vim x:script  
对于directory来说: r:ls w:mkdir/rmdir/touch/rm x:cd

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2.chown:改变文件或目录的所有者  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzU4NjcxMw_size_16_color_FFFFFF_t_70 3]  
手敲demo:创建一个文件:fengjie,ls查看该文件的所有者为root.执行更改所有者命令:chown jialing fengjie,再ls查看该文件的所有者.变成了jialing  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzU4NjcxMw_size_16_color_FFFFFF_t_70 4]  
3.chgrp:改变文件的所属组  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzU4NjcxMw_size_16_color_FFFFFF_t_70 5]  
手敲demo:  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzU4NjcxMw_size_16_color_FFFFFF_t_70 6]  
4.umask:显示\\设置文件的默认权限  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzU4NjcxMw_size_16_color_FFFFFF_t_70 7]  
![在这里插入图片描述][20210315103924117.png]

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[20210315103924117.png]: /images/20221023/d9b013285ba5459ea1925fb16ca5df34.png