About SFU Microsoft Windows Services for UNIX 3.5

You can download and install it from their site.

Subsystem for Unix-based Applications and Services for Unix (SFU/ SUA/ Interix Community)

You can download and install it from their site.

SUA 5.2 x64 (Windows 2003R2 x64)

• 872958, 931134, 932143, 942878, 948918, 949653, 951150, 953602, 957796, 959543, 973389, 977615, 981194
• additionally for Win2003 R2 SP1: 921207, 929143, 936051, 942868, 945449, 945660
• additionally for Win2003 R2 SP2: 929143, 936051, 942868, 945660, 957390, 969274, 971518, 977615

SUA 6.0 x64 (Windows Vista/2008 x64)

• 949653, 951150, 957796, 959543, 973389, 977615
• additionally for Vista/2008 SP1: 969874, 973389
• additionally for Vista/2008 SP2: 969874, 977615

SUA 6.1 x64 (Windows 7/2008R2 x64)

• 981194

Debian port

http://debian-interix.net/