阿里雲 centos7 設定python2 與 python3 並存

摘要： 一、whereis python python: /usr/bin/python.bak /usr/bin/python2.7 /usr/bin/python /usr/lib/python2.7 /usr/lib64/python2.7 /etc/python /usr/include/...

一、whereis python

python: /usr/bin/python.bak /usr/bin/python2.7 /usr/bin/python /usr/lib/python2.7 /usr/lib64/python2.7 /etc/python /usr/include/python2.7 /usr/share/man/man1/python.1.gz

二、cp /usr/bin/python  /usr/bin/python.bak

三、使用 python -V 命令檢視一下是否安裝Python

四、yum install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gcc make

五、

去官網下載編譯安裝包或者直接執行以下命令下載

wgethttps://www.python.org/ftp/python/3.6.2/Python-3.6.2.tar.xz

tar  -xvf Python-3.6.2.tar.xz

切換進入

cd Python-3.6.2

編譯安裝

./configure prefix=/usr/local/python3

make && make install

安裝完畢，/usr/local/目錄下就會有python3了

六、修改預設為python3

rm  /usr/bin/python

[root@pc bin]# ln -s /usr/local/python3/bin/python3 /usr/bin/python  做個軟連線

[root@pc bin]# python -V

Python 3.6.2