centos下保留python2安装python3

1. 安装依赖环境

# 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.在python官网找到本身须要的python，tar包下载至本地

# wget https://www.python.org/ftp/python/3.A.B/Python-3.A.B.tgz

 

3. 建立Python3的目录

# mkdir /usr/local/python3 

 

4. 解压下载文件并切换目录

# tar -zxvf Python-3.A.B.tgz

# cd Python-3.A.B

 

5. 执行

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

# make && make install

 

6. 建立Python3的软连接

# ln -s /usr/local/python3/bin/python3 /usr/bin/python3

 

7. 建立Pip3的软连接

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

 

8. 测试命令 python3 和 pip3

# python3

# pip3

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安装保留了原python命令调用python2

安装完成