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Full Discussion: ACL confusion
Top Forums UNIX for Advanced & Expert Users ACL confusion Post 303005223 by jim mcnamara on Sunday 15th of October 2017 11:52:22 PM
Old 10-16-2017
setfacl -dx [acl lists ] delete files/directories ACLs for the default (-d is default) (-x removes -X also removes)

Try reading the ACL man page first, then read the setfacl page -- links below. Based on your comments I think you may have gotten some wrong information. Make sure you understand what you are doing, create a dummy directory with some files - touch creates empty files. Play with your dummy directory and files FIRST before you trash something like the /usr directory tree irrevocably - and lose your system.

setfacl(1): set file access control lists - Linux man page
acl(5): Access Control Lists - Linux man page
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GETFACL(1)						    BSD General Commands Manual 						GETFACL(1)

NAME
getfacl -- get ACL information SYNOPSIS
getfacl [-dhinqv] [file ...] DESCRIPTION
The getfacl utility writes discretionary access control information associated with the specified file(s) to standard output. If the getconf(1) utility indicates that {_POSIX_ACL_EXTENDED} is not in effect for a file then the standard discretionary access permissions are interpreted as an ACL containing only the required ACL entries. The following option is available: -d The operation applies to the default ACL of a directory instead of the access ACL. An error is generated if a default ACL cannot be associated with file. This option is not valid for NFSv4 ACLs. -h If the target of the operation is a symbolic link, return the ACL from the symbolic link itself rather than following the link. -i For NFSv4 ACLs, append numerical ID at the end of each entry containing user or group name. Ignored for POSIX.1e ACLs. -n Display user and group IDs numerically rather than converting to a user or group name. Ignored for POSIX.1e ACLs. -q Do not write commented information about file name and ownership. This is useful when dealing with filenames with unprintable char- acters. -v For NFSv4 ACLs, display access mask and flags in a verbose form. Ignored for POSIX.1e ACLs. The following operand is available: file A pathname of a file whose ACL shall be retrieved. If file is not specified, or a file is specified as -, then getfacl reads a list of pathnames, each terminated by one newline character, from the standard input. For an explanation of the ACL syntax, see the setfacl(1) manual page. EXIT STATUS
The getfacl utility exits 0 on success, and >0 if an error occurs. EXAMPLES
getfacl / Retrieve ACL for the directory /. getfacl -d / Retrieve the default ACL for the directory /, if any. SEE ALSO
setfacl(1), acl(3), getextattr(8), setextattr(8), acl(9), extattr(9) STANDARDS
The getfacl utility is expected to be IEEE Std 1003.2c compliant. HISTORY
Extended Attribute and Access Control List support was developed as part of the TrustedBSD Project and introduced in FreeBSD 5.0. AUTHORS
Robert N M Watson BSD
September 4, 2009 BSD
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