ubuntu SecureCRT connection failure problem

After installing ubuntu, this problem occurs when connecting to SecureCRT

This is the error after I installed the ssh service

sudo apt-get install openssh-server

1 First check if the server is really turned on

netstat -l

server is on

If the connection is still wrong, modify the following two files

sudo vi /etc/ssh/ssh_config

Copy these two sentences into the following file

Then save. Restart ssh after exiting

sudo /etc/init.d/ssh restart

Then connect again, and mine can connect.