ssh登录慢的解决方法

编辑 /etc/nsswitch.conf

找到 hosts 改成下面这样：

hosts: files dns [NOTFOUND=return]

编辑 /etc/ssh/sshd_config

找到UseDNS选项改成

UseDNS no

如果报

Address 192.168.x.x maps to localhost, but this does not map back to the address - POSSIBLE BREAK-IN ATTEMPT!

修改

本地/etc/ssh/ssh_config 

找到GSSAPIAuthentication 选项改成

GSSAPIAuthentication no