centos7.6安装python3

查看系统默认python

执行路径

[root@iZhp ~]# which python /usr/bin/python

查看默认python配置和连接等

进入执行路径 cd /usr/bin/

[root@iZhp bin]# ll python* lrwxrwxrwx 1 root root 7 Jul 11 2019 python -> python2 lrwxrwxrwx 1 root root 9 Jul 11 2019 python2 -> python2.7 -rwxr-xr-x 1 root root 7216 Jun 21 2019 python2.7 -rwxr-xr-x 1 root root 1835 Jun 21 2019 python2.7-config lrwxrwxrwx 1 root root 16 Jul 11 2019 python2-config -> python2.7-config lrwxrwxrwx 1 root root 14 Jul 11 2019 python-config -> python2-config [root@iZ bin]#

使用了多层软链接进行指向python2版本的执行路径

安装python3依赖包，源码安装使用

# 安装依赖库 yum -y install gcc* glien* yum -y install zlib zlib-devel yum -y install bzip2 bzip2-devel yum -y install ncurses ncurses-devel yum -y install readline readline-devel yum -y install openssl openssl-devel yum -y install openssl-static yum -y install xz lzma xz-devel yum -y install sqlite sqlite-devel yum -y install gdbm gdbm-devel yum -y install tk tk-devel yum -y install libffi libffi-devel

python3 安装

下载文件 wget方式，源码安装 切换到、usr/local/目录下,将文件下载到该目录下 [root@iZh bin]# cd /usr/local/ [root@iZhp local]# ls aegis bin etc games include lib lib64 libexec sbin share src [root@iZhp local]# wget https://www.python.org/ftp/python/3.8.1/Python-3.8.1.tar.xz --2020-07-01 15:15:57-- https://www.python.org/ftp/python/3.8.1/Python-3.8.1.tar.xz Resolving www.python.org (www.python.org)... 151.101.228.223, 2a04:4e42:1a::223 Connecting to www.python.org (www.python.org)|151.101.228.223|:443... connected. HTTP request sent, awaiting response... 200 OK Length: 17828408 (17M) [application/octet-stream] Saving to: ‘Python-3.8.1.tar.xz’ 1% [=> ] 298,631 10.5KB/s eta 23m 52s 解压 tar -xvJf Python-3.6.2.tar.xz [root@iZ local]# ls aegis bin etc games include lib lib64 libexec Python-3.8.1 Python-3.8.1.tar.xz sbin share src 配置： 指定安装路径 [root@iZhp local]# cd Python-3.8.1 [root@iZhp Python-3.8.1]# ./configure preifx=/usr/local/python3 checking build system type... x86_64-pc-linux-gnu checking host system type... x86_64-pc-linux-gnu 编译安装 [root@iZhp Python-3.8.1]# [root@iZhp Python-3.8.1]# make && make install gcc -pthread -c -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -std=c99 -Wextra -Wno-unused-result -Wno-unused-parameter -Wno-missing-field-initializers -Werror=implicit-function-declaration -I./Include/internal -I. - ........ Looking in links: /tmp/tmpp_opep1t Collecting setuptools Collecting pip Installing collected packages: setuptools, pip Successfully installed pip-19.2.3 setuptools-41.2.0 创建链接: 同时创建python3 和pip3 的软连接 pip3 安装路径在python3 安装路径下，3.8会按照在/usr/local/bin 中 ln -s /usr/local/python3/bin/python3 /usr/bin/python