How to uninstall/reinstall cygwin to use the sshd

cygwin;opensshsshd

I installed cygwin/sshd without good results. I removed the c:\cygwin directory to reinstall. I removed the sshd Administrator user by hand.

I reinstalled the cygwin again, then run the 'ssh-host-config -y'. Strangely, it doesn't ask anything about making a new user. And the procedure is really short.

$ ssh-host-config -y
* Query: Overwrite existing /etc/ssh_config file? (yes/no) yes
 Info: Creating default /etc/ssh_config file
 Query: Overwrite existing /etc/sshd_config file? (yes/no) yes
 Info: Creating default /etc/sshd_config file
 Info: Privilege separation is set to yes by default since OpenSSH 3.3.
 Info: However, this requires a non-privileged account called 'sshd'.
 Info: For more info on privilege separation read /usr/share/doc/openssh
ME.privsep.
* Query: Should privilege separation be used? (yes/no) yes
*** Info: Updating /etc/sshd_config file

*** Info: Host configuration finished. Have fun!

When I ran 'cygrunsrv -S sshd', I get an error.
"Win 32 error 1069: The service did not start due to logon failure".
It's reasonable message, as I deleted the sshd as a user, and the reinstall procedure did nothing for that again.

I see I got something wrong with the uninstallation.

Q: How can I uninstall the sshd related thing perfectly so that I can reinstall it again?

Best Answer

If sshd has been previously installed on the system, the following cleanup procedure should be performed before invoking ssh-host-config:

# Remove sshd service
cygrunsrv --stop sshd
cygrunsrv --remove sshd

# Delete any sshd or related users (such as cyg_server) from /etc/passwd
#   (use your favorite editor)

# Delete any sshd or related users (such as cyg_server) from the system
net user sshd /delete
net user cyg_server /delete