要在服务器客户端上启用 X11 转发，请编辑文件“/etc/ssh/ssh_config”并在 ssh 服务器上编辑文件“/etc/ssh/sshd_config”并执行以下相应的配置更改。

对于 CentOS/RHEL 5,6

X11转发（X11 Forwarding）

取消注释“# ForwardX11”行并将“ForwardX11 no”更改为“ForwardX11 yes”

ForwardX11 yes

可信 X11 转发

取消注释“# ForwardX11Trusted”行并将“ForwardX11Trusted no”更改为“ForwardX11Trusted yes”

# If this option is set to yes then remote X11 clients will have full access
# to the oroirnal X11 display. As virtually no X11 client supports the untrusted
# mode correctly we set this to yes.
ForwardX11Trusted yes

3. 每次更改后重新启动 sshd 服务或者重新启动系统。

# service sshd restart

对于 CentOS/RHEL 7

X11转发

1. 取消注释以下几行：

X11Forwarding yes
X11DisplayOffset 10
X11UseLocalhost no

2. 启动并启用sshd服务

# systemctl start sshd.service
# systemctl enable sshd.service