Cygwin
Cygwin comes with a number of command-line utilities that are used to manage the UNIX emulation portion of the Cygwin environment.
Utilities
Geek to Live: Introduction to Cygwin, part I - Downloads - Lifehacker
by Gina Trapani Introduction to who? If that's what you thought when you saw the title of this article, then it's written for you. [ 1 ]
urxvt
This section discusses how the Windows security model is utilized in Cygwin to implement POSIX-like permissions, as well as how the Windows authentication model is used to allow cygwin applications to switch users in a POSIX-like fashion. The setting of POSIX-like file and directory permissions is controlled by the mount option (no)acl which is set to acl by default. We start with a short overview.
