Xonclosedbyforeignhost. Error reported by xshell link in Ubuntu12.04

In Ubuntu12.04, The xshell link reports Readfromsocketfailed: Connectionresetbypeer or Connectionclosedbyforeignhost. solution to the error: the cause of the problem is that the file familiarity in the/etc/ssh directory has been modified. You can change the file to the original state: cd/etc/sshsudochmod644./* su.

In Ubuntu 12.04, The xshell link reports: Read from socket failed: Connection reset by peer or Connection closed by foreign host. Solution to the error:

The cause of this problem is that the file familiarity in the/etc/ssh directory has been modified, and you can change it back to the original state:

Cd/etc/ssh

Sudo chmod 644 ./*

Sudo chmod 600 ssh_host_dsa_key

Sudo chmod 600 ssh_host_rsa_key

Sudo chmod 755.