--- a/cygwin.rst	Tue Jan 24 17:58:00 2017 +0200
+++ b/cygwin.rst	Tue Jan 24 23:07:33 2017 +0200
@@ -36,6 +36,62 @@
 
 Also you need edit /etc/passwd to point to correct home path.
 
+apt-cyg package manager
+=======================
+
+``apt-cyg`` is based on ``bash``, ``wget``, ``tar``, ``gawk`` and ``bzip2``
+packages and provide convenient commands for managing and queries packages::
+
+  $ apt-cyg update
+  $ apt-cyg install emacs-w32
+  $ apt-cyg remove emacs-w32
+
+Information about package and dependencies::
+
+  $ apt-cyg show emacs-w32
+  $ apt-cyg depends wget
+  $ apt-cyg rdepends emacs
+
+List installed packages::
+
+  $ apt-cyg list
+
+Search for package with file across installed packages::
+
+  $ apt-cyg search stdio.h
+
+Search for package with file through cygwin.com::
+
+  $ apt-cyg searchall stdio.h
+
+List all packages in ``setup.ini``::
+
+  $ apt-cyg listall
+
+Find package by regex::
+
+  $ apt-cyg listall ^emacs
+
+To search for package name or list packages::
+
+To switch between mirrors::
+
+  $ apt-cyg mirror ftp://ftp.cygwinports.org/pub/cygwinports
+  $ apt-cyg update
+  $ apt-cyg install php
+
+  $ apt-cyg mirror ftp://www.fruitbat.org/pub/cygwin/circa/2016/08/30/104223
+
+To change a location of directory where packages and ``setup.ini`` downloaded::
+
+  $ apt-cyg cache
+  C:\net
+
+  $ apt-cyg cache ~/net
+  Cache set to C:\home\net.
+
+https://github.com/transcode-open/apt-cyg/
+
 Installation on Windows XP
 ==========================