Linux LAN Login response time is too long

In a LAN, when using SSH to log on to other machines, there are times when waiting for more than 10s to properly log on.

Reason:

Linux uses DNS to resolve the login IP by default, but on the LAN, there is no DNS server, and the machine is not added

The binding of IP to the domain name (hostname), resulting in a lot of wasted time checking the host name.

Workaround:

1. Add IP and hostname bindings to the/etc/hosts file

2. Modify the file/etc/nsswitch.conf, remove the DNS behind the HOSTS:XXX

Hosts:files mdns4_minimal [Notfound=return] DNS

Linux LAN Login response time is too long