How do i restart a shell session from within SSH when it looks something like this:

anton@ubuntu:~$ c: command not found
                                    anton@ubuntu:~$ lib
                                                       anton@ubuntu:~$ this is working, but its messed up
                         anton@ubuntu:~$

I can execute commands, but as i input them nothing shows on the console, but as soon as i press enter the command executes and the output comes (without line-endings, as shown above)

exec bash
bash --login
clear

nothing really works, restarting the SSH session however works. Temporary solution is to start a screen session and every time the interface freezes you simply do Ctrl+a->c to start a new session and close the old one..