centos 安装python3

centos自带Python2.7，但是Python2不能被删除，因为有很多系统命令依赖python2.7，因此我们需要另外安装python3

1.安装依赖包

sudo yum -y groupinstall "Development tools"

sudo yum -y install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel

2.下载python

根据自己需要到 https://www.python.org/ftp/python 查找下载地址

wget https://www.python.org/ftp/python/3.6.6/Python-3.6.6.tar.xz

3.安装python3

sudo tar -xvJf Python-3.6.6.tar.xz

sudo cd Python-3.6.6

sudo ./configure --prefix=/usr/local/python3

sudo make && make install

4.创建软连接

sudo ln -s /usr/local/python3/bin/python3 /usr/bin/python3
sudo ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3

5.测试

[root@test Python-3.6.6]# python3

Python 3.6.6 (default, Jul 25 2018, 12:01:40)

[GCC 4.4.7 20120313 (Red Hat 4.4.7-23)] on linux

Type "help", "copyright", "credits" or "license" for more information.

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