Recent conda installation software, installation tips can not always appear:
Collecting package metadata: failed
UnavailableInvalidChannel: The channel is not accessible or is invalid.
channel name: anaconda/cloud/bioconda
channel url: https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/bioconda
error code: 404
You will need to adjust your conda configuration to proceed.
Use `conda config --show channels` to view your configuration's current state,
and use `conda config --show-sources` to view config file locations.
The original Tsinghua stopped mirroring services:
on Stopping Anaconda image of the service
https://mirror.tuna.tsinghua.edu.cn/news/close-anaconda-service/
Solution:
Use conda config --remove channels will prompt image source can be deleted.
Reproduced in: https: //www.jianshu.com/p/a2e3596adacc