If an ACL has been set on any file on a given file system, that
file system has the ext_attr attribute.
This attribute can be seen using the following command:
tune2fs -l <filesystem-device>
|
A file system that has acquired the ext_attr attribute can be mounted with older
kernels, but those kernels do not enforce any ACLs which have been
set.
Versions of the e2fsck utility included
in version 1.22 and higher of the e2fsprogs package (including the versions in Red
Hat Enterprise Linux 2.1 and 4) can check a file system with the
ext_attr attribute. Older versions refuse
to check it.
