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/etc/ssh/ssh_config  (client)
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Host *
ForwardX11Trusted yes
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/etc/ssh/sshd_config (server)
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PasswordAuthentication yes
X11Forwarding yes 
UsePrivilegeSeparation yes
Subsystem	sftp	/usr/lib/ssh/sftp-server



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note: Ubuntu does not have ssh installed by default:

UBUNTU:  
	apt-get install ssh
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