Introducing Cygwin, the ultimate tool for developers looking to bridge the gap between Windows and Unix-like systems. Crafted by Red Hat, Inc., Cygwin provides a comprehensive suite of tools that facilitate seamless integration with Linux and other Unix-like environments on Windows. What's more, Cygwin is user-friendly and comes equipped with everything you need to create robust applications that work seamlessly across multiple platforms. Download Cygwin today and unlock the full potential of your Windows machine.

Cygwin is a Linux-like environment for Windows. It consists of two parts:
# A DLL (cygwin1.dll) which acts as a Linux API emulation layer providing substantial Linux API functionality.
# A collection of tools which provide Linux look and feel.

What Can Cygwin Do?

With Cygwin, administrators can login remotely to any PC, fix problems within a Posix/Linux/UNIX shell on any Windows machine, and run shell command scripts. Sophisticated shell command scripts can be created with standard shells, such as sed or awk. Standard Windows command line tools can even be intermixed within the UNIX/Linux shell script environment to administer the Windows system. Over the years, UNIX/Linux system administrators have developed a large toolbox set of management scripts for their UNIX/Linux machines. Cygwin provides the ability to continue using these scripts on Windows machines.

Why Use Cygwin?

One of the largest problems developers face today is supporting their applications on disparate platforms. Windows workstations continue to be added to an environment already populated by Linux and other UNIX-based Operating Systems. Using Cygwin, developers can manage heterogeneous environments in a consistent, efficient way. Cygwin provides a standard UNIX/Linux shell environment, including many of its most useful commands to the Windows platform, so IT managers can effectively deploy trained staff and leverage existing investments in UNIX/Linux source code and shell scripts.

New Release
Fixes:
Guard c32rtomb() against invalid input characters. Addresses a testsuite error in current gawk git master.
Allow changing primary group even when running with cygserver account caching. Addresses: https://cygwin.com/pipermail/cygwin/2026-January/259250.html
Correctly handle i->İ, I->ı conversion in turk and azerbaijani languages (LC_CTYPE=tr_TR, tr_CY, az_AZ).
Fix uid/gid mapping from unix id to Cygwin id in certain scenarios when accessing Samba or NFS shares on unixoid OS.
gencat: Fix a bug in octal value handling in catalog input files. Addresses a flaw in tcsh's cataloge file generation.
Bump default_POSIX_C_SOURCE to 202405.
[ Cygwin release history ]

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