linux一键安装Python3脚本
linux 系统很多默认安装的是 python2,例如 centos 就是默认安装的python2,但是有的程序必须要python3,这时候,我们就需要安装一个python3,同时将系统中,依赖python2的程序改一下,如yum是必须依赖与python2的,就需要将yum的执行器改为python2。
一键安装python3
直接复制到您的linux命令行,就能安装python3了。
wget http://66-ai.com/download/script-litte-prince/app/install-python3.sh -O /root/install-python3.sh && sh install-python3.sh
上面的代码是自动安装,如果想看看install-python3.sh 脚本中是什么,可以看下面的脚本:
#!/usr/bin/env bash # 安装python3 # 自动将yum的命令依赖改为python2,以免引起yum异常 yum install -y openssl-devel bzip2-devel expat-devel gdbm-devel readline-devel sqlite-devel if ! [ -x "$(command -v axel)" ]; then wget http://66-ai.com/download/script-litte-prince/Python-3.6.5.tgz -O /root/Python-3.6.5.tgz else axel -n 10 -a http://66-ai.com/download/script-litte-prince/Python-3.6.5.tgz -o /root/Python-3.6.5.tgz fi tar -xzvf Python-3.6.5.tgz cd Python-3.6.5 ./configure --prefix=/usr/local/python make make install cd /usr/bin mv python python.bak mv pip pip.bak ln -s /usr/local/python/bin/python3.6 /usr/bin/python ln -s /usr/local/python/bin/pip3.6 /usr/bin/pip python2str=`cat /usr/bin/yum | grep -w '#!/usr/bin/python2'` if [ $python2str = '#!/usr/bin/python2' ]; then echo '已经替换过' else sed -i 's@#!/usr/bin/python@#!/usr/bin/python2@g' /usr/bin/yum sed -i 's@#!/usr/bin/python@#!/usr/bin/python2@g' /usr/bin/yum-builddep sed -i 's@#!/usr/bin/python@#!/usr/bin/python2@g' /usr/bin/yum-config-manager sed -i 's@#!/usr/bin/python@#!/usr/bin/python2@g' /usr/bin/yum-debug-dump sed -i 's@#!/usr/bin/python@#!/usr/bin/python2@g' /usr/bin/yum-debug-restore sed -i 's@#!/usr/bin/python@#!/usr/bin/python2@g' /usr/bin/yumdownloader sed -i 's@#!/usr/bin/python@#!/usr/bin/python2@g' /usr/bin/yum-groups-manager fi
python2和python3共存
上面安装脚本中,我们没有卸载python2,如果你想用python2,那么就用python2命令,如果你想用python3就用python命令。
这样就做到了python2和python3共存了。