Installing Jenkins on Ubuntu
How To Install and Use Jenkins on Ubuntu 12.04

Security and Resetting User

Disable security
Reset Jenkins Configuration Command Line

...
<useSecurity>true</useSecurity>
...

Windows

C:\Program Files (x86)\Jenkins\jobs\project1\workspace

c:\cygwin\bin\mintty --hold always --exec /cygdrive/c/path/to/bash/script.sh

How to make Cygwin the default shell for Jenkins?
Can I use cygwin to script a hudson build step?
Jenkins on windows with cygwin