linux下conda报Solving environment: failed with initial frozen solve. Retrying with flexible solve.

报错如下：

Collecting package metadata (current_repodata.json): done
Solving environment: failed with initial frozen solve. Retrying with flexible solve.
Solving environment: failed with repodata from current_repodata.json, will retry with next repodata source.

自己想装fastqc和cutadapt，反复failed，尝试了重装、更新、设置flexible无效。以下为其他解决方法：

第一步：添加源

多添加几个源。
.condarc文件如下：

channels:
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/pytorch/
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/menpo/
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/bioconda/
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/msys2/
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge/
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/
  - http://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/
show_channel_url: true
channel_priority: flexible
show_channel_urls: true

第二步：装mamba

设置完上面以后，理论上可以装mamba，cutadapt要通过mamba来装

conda install mamba
Collecting package metadata (current_repodata.json): done
Solving environment: failed with initial frozen solve. Retrying with flexible solve.
Solving environment: failed with repodata from current_repodata.json, will retry with next repodata source.
Collecting package metadata (repodata.json): done
Solving environment: done

这一步非常缓慢，但能行

第三步：用mamba装cutadapt

mamba install cutadapt

如上成功