版本须知
ubuntu18.04 安装3个python版本,系统已自带python3.6.9和2.7.15,目前的旧链接指向python2,并且2和3产生了冲突,此时我们设置python3.6.9为默认即可
注意事项
切记不可随意删除系统自带python版本,因为系统有很多软件依赖着
删除旧版本python的软链接指向
1.查看python现有信息
root@chenwx:/usr/bin# ls /usr/bin/python* -lh
lrwxrwxrwx 1 root root 24 Jun 9 14:45 /usr/bin/python -> /etc/alternatives/python
lrwxrwxrwx 1 root root 9 Apr 16 2018 /usr/bin/python2 -> python2.7
-rwxr-xr-x 1 root root 3.5M Apr 16 01:20 /usr/bin/python2.7
lrwxrwxrwx 1 root root 9 Oct 25 2018 /usr/bin/python3 -> python3.6
-rwxr-xr-x 2 root root 4.4M Apr 18 09:56 /usr/bin/python3.6
lrwxrwxrwx 1 root root 34 Jun 9 14:41 /usr/bin/python368 -> /usr/local/python3.6.9/bin/python3
-rwxr-xr-x 2 root root 4.4M Apr 18 09:56 /usr/bin/python3.6m
-rwxr-xr-x 1 root root 1018 Oct 29 2017 /usr/bin/python3-jsondiff
-rwxr-xr-x 1 root root 3.6K