需求
To use xattr, you will need libattr installed. It is available at » http://savannah.nongnu.org/projects/attr/.
注意:
These functions only work on filesystems that support extended attributes, and have them enabled at mount time. Some common filesystems that support extended attributes are
ext2,ext3,reiserfs,jfs, andxfs.
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sven _ oostenbrink atserver yahoo dot co ¶
15 years ago
An important thing to realize, if you wish to use xattr, you need a filesystem that has extended attributes functionalty and also has those enabled! I lost quite a bit of time with puzzling why xattr was not working with my ext4 system, until I found that the extended attributes, by default, are not enabled.
Adding user_xattr to the mounting configuration of the filesystem where I was working fixed the problem
/dev/sdb2 /home ext4 relatime,user_xattr 0 2