Python3安装后再使用yum安装报错File “/usr/bin/yum” line 30 except KeyboardInterrupt e:

前情提示: centOS6.8; 刚装完最新的Python3.8.3,准备安装screen后台运行程序;centOS原来自带了Python2.6.6; 报错内容如下: [root@ebs-40617 ~]# cd /server/backup [root@ebs-40617 backup]# screen -ls -bash: screen: command not found [root@ebs-40617 backup]# yum -y install screen File "/usr/bin/yum", line 30 except KeyboardInterrupt,