How to set permissions for folder in Unix/Linux Ubuntu

How to set permissions for folder in Unix/Linux Ubuntu This is not necessarily direct computer science question but its closely related.
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Guest [Entry]

"Don't forget that the filesystem must be mounted with the 'acl' flag in order to use access control lists. Otherwise the setfacl command will return 'Operation not supported'.

For example this is the entry in my fstab file (/etc/fstab):-

# <file system> <mount point> <type> <options> <dump> <pass>
/dev/sdb1 /media/DataDrive ext3 acl 0 0"