Cygwin/X SSH

* Download Cygwin setup.exe from cygwin.com. There is no difference between “Install Cygwin Now” and “Install Cygwin/X Now” buttons.
* Move setup.exe to a local folder where you would also like to store downloaded Cygwin files, e.g. c:\download\cygwin.

* Double click setup.exe to startup download and installation.
* Choose Install from internet.
* Set root directory, e.g. c:\cygwin.
* Accept Local Package Directory, e.g. c:\download\cygwin.
* Choose Direct Connection if you’re directly connected to the internet.
* Choose download site, e.g. ftp://ftp.gtlib.gatech.edu.
* In the upper left corner, type X11 in the search field. Note the capital X.
* Select to install the whole X11 category at the bottom of the package list by clicking the two-arrow symbol until text after it changes to “install“.
* Click the “View” button so all the packages are listed alphabetically.
* Type openssh in the search field.
* Find “openssh” package. Click the double-arrow symbol until the text after it changes to install or package version numbers, e.g. 5.8p 1-1.
* Click Next and wait for the selected packages (Cygwin, X11 and openssh) to be downloaded and installed.
* Click Finish when done.

* Click Cygwin shortcut to bring up the Cygwin window.
* Type startx to bring up the Cygwin/X window (Cygwin/X:0.0).
* In one of the xterm, type

ssh -Y -l username remote_hostname_or_ip_address

* Remote X windows such as Java GUI can now be shown on Cygwin/X.

References
Cygwin/X User’s Guide
Cygwin SSH Notes
Cygwin/X Frequently Asked Questions

# sync up local accounts
$mkpasswd -l > /etc/passwd

# Using an alternate home root
$ mkpasswd -l -p "$(cygpath -H)" > /etc/passwd

To permanently enable back arrow key in xterms:
* Create a file called .Xdefaults in home directory.
* Add to .Xdefaults file:

*ttyModes: erase ^H

* Remove all installed services

# Remove sshd service
$ cygrunsrv --stop sshd
$ cygrunsrv --remove sshd
$ net user sshd delete

# Remove cron service
$ cygrunsrv --stop cron
$ cygrunsrv --remove cron
$ net user cron delete

# Remove syslog-ng service
$ cygrunsrv --stop syslog-ng
$ cygrunsrv --remove syslog-ng

* Delete the folder c:\cygwin and all its sub-folders.
* Remove the Environment Variable CYGWIN.
* Edit the Environment path accordingly.
* Start -> Run -> regedit and delete these two registry trees

"HKEY_CURRENT_USER_Software_Cygnus Solutions"
"HKEY_LOCAL_MACHINE_Software_Cygnus Solutions"

* Go to Control Panel -> Category View -> Performance and Maintenance -> Administrative Tools -> Computer Management (or click Start -> Run -> compmgmt.msc):
– Delete the sshd user if it exists in the “System Tools” – “Local Users and Groups” – “Users” section.
– Delete cron user if it exists in the “System Tools” – “Local Users and Groups” – “Users” section.
Reference: http://pigtail.net/LRP/printsrv/remove-cygwin.html