chattr

前言

• 开发机有sudo权限，但是非root用户
• sudo 修改某文件，提示无权限
• ls -al 显示  -rw-r--r-- 

lsattr

• 看来只能用lsattr 看额外的属性了
•  ----i--------e-  
• 去除 i 属性   sudo chattr -i filename 
• 修改完毕后，恢复文件的写保护状态   sudo chattr +i filename 

chattr i 属性

Immutable	i	+i to set -i to clear[note 1]	A file with the i attribute cannot be modified. It cannot be deleted or renamed, no link can be created to this file and no data can be written to the file. When set, prevents, even the superuser, from erasing or changing the contents of the file.