Linux Learning 134 Unit 2

Second Book Unit II

1. What is the permission list

A permission setting that adds a name to a file's permissions

2. How to view the list of permissions

[[email protected] mnt]# ls-l file

-rw-r--r--. 1 root root 0 Nov 7 09:14 file

|

If this bit is ".", it means that there is no permission list on this

If this bit is "+", the list of permission permissions exists

3. How to view the list of permissions

[[email protected] mnt]# ls-l file

-rw-rw-r--<<+>> 1 root root 0 Nov 7 09:14 file

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[[email protected] mnt]# Getfacl file

# File:file # #文件名称

# Owner:root # #文件所有人

# Group:root # #文件所有组

user::rw- # #所有人权限

user:student:rw- # #特定用户权限

group::r-- # #所有组权限

mask::rw- # #特定用户生效的最大权限

other::r-- # #其他人权限

4. How to set ACL permissions

Setfacl

Setfacl - m <u|g|m>:<username|groupname>: Permissions filename # #设定acl

setfacl-x <u|g>:<username|groupname> filename # #去除某个用户或者组的acl

Setfacl-b filename # #删除文件上的权限列表

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5.acl Default Permissions

The default permissions are used for the directory, allowing all new files in the directory to inherit this permission, which does not take effect on the directory itself and does not affect files that already exist in the directory

setfacl-m d:<u|g|o>:<username|group>:rwx Directory # #设定默认权限

setfacl-x d:<u|g|o>:<username|group> Directory # #撤销目录中的某条默认权限

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7. In Rhel6 and previous versions, the user-created partition does not support ACLs, and if necessary, the ACL parameter must be loaded

Mount-o Remount,acl Equipment

Vim/etc/fstab

Equipment mount point type Defaults,acl 0 0

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Linux Learning 134 Unit 2