ACL (Access Control List) not working in RHEL 9

Patrick Almeida

11/11/23, 8:42 PM

I'm creating some ACLs in my RHEL 9 laboratory under learning purposes. But I faced the following problem.

As user1 I've created a file named "aclfile" under /tmp and created an ACL so user100 can operate read and write actions over this file.

[user1@server1 tmp]$ pwd
/tmp
[user1@server1 tmp]$ touch aclfile
[user1@server1 tmp]$ setfacl -m u:user100:rw aclfile
[user1@server1 tmp]$ getfacl -c aclfile
user::rw-
user:user100:rw-
group::r--
mask::rw-
other::r--
[user1@server1 tmp]$ ls -l aclfile
-rw-rw-r--+ 1 user1 user1 0 Nov 11 16:42 aclfile

As user100, even with the ACL allowing this user to read and write in the aclfile. Vim, Vi and Nano editors gave me this error message when I try to write(!w,!wq,!x) something in this file: "aclfile" E212: Can't open file for writing".

But, this works out well as user100:

[user100@server1 tmp]$ echo "foo" > aclfile
[user100@server1 tmp]$ cat aclfile
foo

Am I missing any point here?

156

0 + 1

linux

redhat

access-control-list

user122574

2/27/24, 11:22 PM

I've found the same issue in RHEL9. I also noted that between 8 and 9 the default umask was changed from 0002 to 0022, though, if one does chmod 664 on the file, don't see why that would matter.

Elon Musk

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EN: ACL (Access Control List) not working in RHEL 9

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