conda create -n tensorflow python=3.5

Fetching package metadata .......
CondaHTTPError: HTTP 000 CONNECTION FAILED for url <https://nanomirrors.tuna.tsinghua.edu.cn/anaconda/cloud/linux-64/rpodata.json>
Elapsed: -

An HTTP error occurred when trying to retrieve this URL.
HTTP errors are often intermittent, and a simple retry will get you on your way.
ConnectTimeout(
 
MaxRetryError("HTTPSConnectionPool(host='nanomirrors.tuna.tsinghua.edu.cn', port=443): Max retries exceded with url: /anaconda/cloud/linux-64/repodata.json (Caused by ConnectTimeoutError(<requests.packages.urllib3.connecton.VerifiedHTTPSConnection object at 0x7fb6d340dcc0>, 'Connection to nanomirrors.tuna.tsinghua.edu.cn timed out. (connct timeout=9.15)'))"
 
,),)

解決方法：

#首先先新增清華的映象源
conda config --add channels https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/msys2/
conda config --add channels https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge/
conda config --add channels https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/
conda config --set show_channel_urls yes
 


#如果無法解決，則刪除channels配置檔案中部分內容

#具體操作如下:
#1、快速建立channels配置檔案的備份(保險起見)
cp ~/.condarc{,.bak}

#檢視配置檔案的內容
cat ~/.condarc.bak 
channels:
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge/
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/msys2/
  - https://nanomirrors.tuna.tsinghua.edu.cn/anaconda/cloud
  - defaults
  - https://nanomirrors.tuna.tsinghua.edu.cn/anaconda/cloud/bioconda
  - https://nanomirrors.tuna.tsinghua.edu.cn/anaconda/cloud/bioconda/conda
  - bioconda
  - r
  - conda-forge
show_channel_urls: true

#2、刪除部分內容
#修改後配置檔案的內容如下：
vim ~/.condarc
channels:
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge/
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/msys2/
show_channel_urls: true

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