Linux ACLs can control the filesystem features and flags for each file or folder.

Introducing ACLs in Linux

ACLs Kernel support

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[synman@server ~]$ grep ACL /boot/config-$(uname -r)
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Listing Filesystem ACLs

[synman@server synman]# sudo getfacl note.txt
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Setting Default ACLs

Adding ACL entries

Removing ACLs

Troubleshooting ACLs

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