Can't execute `conda activate` from bash script

参考链接：
https://github.com/conda/conda/issues/7980
https://github.com/conda/conda/blob/master/CHANGELOG.md#440-2017-12-20

使用anaconda3创建新的环境，新的**和激死?方式如下：
To activate this environment, use
$ conda activate 环境名称
To deactivate an active environment, use
$ conda deactivate
但是如果你的anaconda是从一个老版本更新的，$ conda activate 环境名称 会出现如下问题：

CommandNotFoundError: Your shell has not been properly configured to use 'conda activate'.
If your shell is Bash or a Bourne variant, enable conda for the current user with

    $ echo ". ~/anaconda/etc/profile.d/conda.sh" >> ~/.bash_profile

or, for all users, enable conda with

    $ sudo ln -s ~/anaconda/etc/profile.d/conda.sh /etc/profile.d/conda.sh

The options above will permanently enable the 'conda' command, but they do NOT
put conda's base (root) environment on PATH.  To do so, run

    $ conda activate

in your terminal, or to put the base environment on PATH permanently, run

    $ echo "conda activate" >> ~/.bash_profile

Previous to conda 4.4, the recommended way to activate conda was to modify PATH in
your ~/.bash_profile file.  You should manually remove the line that looks like

    export PATH="~/anaconda/bin:$PATH"

^^^ The above line should NO LONGER be in your ~/.bash_profile file! ^^^

conda info 获得如下结果：

active environment : None
            shell level : 0
       user config file : /home/wunan/.condarc
 populated config files : 
          conda version : 4.5.11
    conda-build version : 2.0.2
         python version : 3.5.5.final.0
       base environment : /home/wunan/anaconda3  (writable)
           channel URLs : https://repo.anaconda.com/pkgs/main/linux-64
                          https://repo.anaconda.com/pkgs/main/noarch
                          https://repo.anaconda.com/pkgs/free/linux-64
                          https://repo.anaconda.com/pkgs/free/noarch
                          https://repo.anaconda.com/pkgs/r/linux-64
                          https://repo.anaconda.com/pkgs/r/noarch
                          https://repo.anaconda.com/pkgs/pro/linux-64
                          https://repo.anaconda.com/pkgs/pro/noarch
          package cache : /home/wunan/anaconda3/pkgs
                          /home/wunan/.conda/pkgs
       envs directories : /home/wunan/anaconda3/envs
                          /home/wunan/.conda/envs
               platform : linux-64
             user-agent : conda/4.5.11 requests/2.18.4 CPython/3.5.5 Linux/4.15.0-55-generic ubuntu/16.04 glibc/2.23
                UID:GID : 1000:1000
             netrc file : None
           offline mode : False     

可以看到版本为4.5.11，python版本3.5.5，是从4.2.0更新的。解决方法为：
$ sudo gedit ~/.bashrc
将 export PATH="/opt/conda/bin:$PATH"（opt/conda is the location where you installed miniconda or Anaconda. It may also be something like ~/Anaconda3 or ~/miniconda2)替换成如下语句
source ~/anaconda3/etc/profile.d/conda.sh

完美解决！