记录一下纪念浪费的3个小时，在新的Mac上发现之前的tunnel脚本都不能用了，总是提示错误：
....
sys_tun_open: /dev/tun0 open failed: No such file or directory
....
Tunnel device open failed...
Could not request tunnel forwarding...
对照了之前的笔记本，发现原来是不必要的把 /etc/ssh_config 里这行启用了：
Tunnel yes
恢复成初始设置后恢复：
# Tunnel no
作者： 车东 发表于：2013-02-05 15:02 最后更新于：2013-02-05 15:02
Tunnel Request tun(4) device forwarding between the client and the server. The
argument must be "yes", "point-to-point" (layer 3), "ethernet" (layer 2), or
"no". Specifying "yes" requests the default tunnel mode, which is
"point-to-point". The default is "no".
版权声明：可以转载，转载时请务必以超链接形式标明文章 ssh: sys_tun_open: /dev/tun0 open failed: No such file or directory 问题的解决 的原始出处和作者信息及 本版权声明。
http://www.chedong.com/blog/archives/001489.html
