In
Unix-like systems, multiple users can be categorized into groups.
POSIX and conventional
Unix file system permissions are organized into three classes, user, group, and others. The use of groups allows additional abilities to be delegated in an organized fashion, such as access to disks,
printers, and other
peripherals. This method, amongst others, also enables the
Superuser to delegate some administrative tasks to normal users, similar to the Administrators group on
Microsoft Windows NT and its derivatives.
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