一定要看到最后再安装tcl
出现如下报错:

1.安装tcl
sudo yum install tcl
报错:
2.安装yum
sudo apt install yum
报错:

解决:https://blog.youkuaiyun.com/shimadear/article/details/90598646?spm=1001.2014.3001.5506
3.继续安装yum
sudo apt install yum
4.现在有了yum,继续1步骤,安装tcl
sudo yum install tcl
报错: