Add acl

acl

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+# Get ACL
+getfacl <file>
+
+# Add or modify ACL on file
+setfacl -m u:username:rX <file>
+setfacl -m g:groupname:rw <file>
+setfacl -m o::- <file>
+
+# or provide all permissions at once
+setfacl -m u::rwx,g:groupname:rX,o::- <file>
+
+# Copy ACL from file-A to file-B
+getfacl file-A | setfacl -M - file-B
+
+# Apply ACL recursivelly to directory
+setfacl -R -m u:username:rX <directory>
+
+# Delete ACL
+setfacl -x u:username,g:groupname <file>
+
+# Delete all ACL on file, including default
+setfacl -b <file>
+
+# Same operations works for default ACLs
+setfacl -m d:u:username:rx <directory>
+setfacl -x d:u:username <directory>
+
+# Delete only default ACLs
+setfacl -k <directory>