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conda无法安装更新，
解决方法：
#首先先添加清华的镜像源
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
#如果无法解决，则删除channels配置文件中部分内容
#具体操作如下:
#1、快速创建channels配置文件的备份(保险起见)cp ~/.condarc{,.bak}
#查看配置文件的内容
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、删除部分内容#修改后配置文件的内容如下：
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
