Linux Rookie starter 2 user Rights list

Second unit user Rights list

1. Definition of permission list

Specify a record table that special users have special permissions on a file

2. Recognition of permission lists

-rw-rw-r--+ 1 root root Oct 21:20 file permission bit has plus permission list open

-rw-r--r--. 1 root root 0 Oct 21:22 westos permission bit number permission list not open

3. View of the Permissions list

Getfaclfile

file:file file name

owner:root file owner

group:root file all groups

user::rw-file Owner permissions

user:test:rw-Special specified user rights

group::r--Group Permissions

MASK::RW permission Threshold

other::r--Other people's rights

     

4. How to set ACL list

setfac-m u:username: Permissions filename

setfacl-m u:test:rwfile Specifies that the test user can read and write to file files

setfacl-x u:studentfile Remove student user information from the list

setfacl-x g:student File Delete student group information in the list

setfacl-b filename close ACL list

     

5.masks permission Threshold

If you perform chmod on a file that has a permission list, you will likely modify the mask in the full-limit list

Mask is the maximum permission value that a particular user can get

setfacl-m m: Permissions # #修改该mask的值

6. Default Permissions

when we need to create a new file or directory in the specified directory that has special permissions for the specified user

setfac-m d:u:username: Permissions filename

default permissions do not take effect on existing files

default permissions do not take effect on the directory itself

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Linux Rookie starter 2 user Rights list