linux - Suddenly I can't log in via ssh... ftp is normal and the project is running normally.

Question

If you connect to the server via ssh, it will directly report Connection closed
It’s been working fine for 2 months...what’s going on

Answer 1

1. Check whether the ssh service is enabled directly on the physical machine

service sshd status

1. Or use the telnet command to check whether the ssh port is open

telnet <host> <port>