My solutions to the remote connection failure of SecureCRT

My solutions to the remote connection failure of SecureCRT
Using VirtualBox to build a ubuntu14.04 system environment, in order to save the frequent operations of direct switching between the host and the virtual machine, we thought of using SecureCRT to connect, but there was a connection problem, such: I want to log on directly through the root account, but I reported an error and found many posts and connections. I tried several methods, but the result was that the connection failed. This is the command to restart the ssh service, some people answer is ssh service is client, server should be sshd: So far, found ubuntu Forum, someone encountered the same problem as me, http://ubuntuforums.org/showthread.php? T = 1895174 after reading the comments and replies between them, I tried to perform the operation. The problem was not solved. During this period, I checked some files and other files, and there were no problems with the configuration files. After reading other people's suggestions, uninstall ssh and reinstall it again to see if there is a problem with the installation. Execute the following command: Finally, I thought of a similar problem when I used putty, at that time, it was rejected to directly use the root account to log on. Therefore, you only need to use the common account to switch the account. Now, the result is quite clear. I used the SecureCRT to log on with the user account first, after that, we switched back to another one.