IMPORTANT: You may need to close and restart your shell after running ‘conda init‘.

conda activate py36

CommandNotFoundError: Your shell has not been properly configured to use 'conda activate'.
To initialize your shell, run

    $ conda init <SHELL_NAME>

Currently supported shells are:
  - bash
  - fish
  - tcsh
  - xonsh
  - zsh
  - powershell

See 'conda init --help' for more information and options.

IMPORTANT: You may need to close and restart your shell after running 'conda init'.

解决方法：

root@5d40ca81acc9:/# source activate
(base) root@5d40ca81acc9:/# conda activate py36
(py36) root@5d40ca81acc9:/#