LinuxQuestions.org - Linux ACL odd output

- Linux - Security (https://www.linuxquestions.org/questions/linux-security-4/)

- - Linux ACL odd output (https://www.linuxquestions.org/questions/linux-security-4/linux-acl-odd-output-4175657466/)

Linux ACL odd output

hi friends
i have a senario but i cant implement that
i create a file with some text in it & remove all permissions :

Code:

# echo "hi Linux" > myFile

# chmod a-rwx myFile

# ls -l myFile

---------- 1 root root 9 Jul 15 11:41 myFile

i have a user with name reza & i want only reza user can read this file & do this via ACL(Access Control List)

Code:

# setfacl -m u:reza:r myFile

output of ls -l is very ODD:

Code:

# ls -l myFile

----r-----+ 1 root root 9 Jul 15 11:41 myFile

read permission added for root group ,,,,what is it mean ?

Code:

# getfacl myFile

# file: myFile

# owner: root

# group: root

user::---

user:reza:r--

group::---

mask::r--

other::---

& in output of getfacl command, what is the mask ??

thank you for answring...

Code:

setfacl -m u:reza:r myFile

According to the man page, this grants read access to an "additional" user. Can that user now access the file?

See man getfacl for what the mask is/means.

Quote:

Originally Posted by scasey (Post 6015560)

Code:

setfacl -m u:reza:r myFile

According to the man page, this grants read access to an "additional" user. Can that user now access the file?

See man getfacl for what the mask is/means.

thank you for aswering...
yes,,the Additional user can access data ,

my question is about realation between ACL & group user.
because ACL permission shown as group permission...

It's my understanding that's what access control lists are about; group permissions.