$ ssh-copy-id zhangjc@localhost /usr/bin/ssh-copy-id: INFO: attempting to login with the new key(s), to filter out any that are already installed /usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys zhangjc@localhost's password: ERROR: Python with virtualenvwrapper module not found! Either, install virtualenvwrapper module for the default python3 interpreter or set VIRTUALENVWRAPPER_PYTHON to the interpreter to use. Number of key(s) added: 1 Now try logging into the machine, with: "ssh 'zhangjc@localhost'" and check to make sure that only the key(s) you wanted were added.