1. 从Python官网到获取Python3的包, 切换到目录/usr/local/src cd /usr/local/src #wget https://www.python.org/ftp/python/3.6.3/Python-3.6.3.tgz 2. 使用命令如下命令进行解压缩: tar -xzf Python-3.6.3.tgz 3. 在/usr/local路径下创建目录--python3, 为第4步的安装目录 $mkdir /usr/local/python3 4. 编译安装(会自动安装pip-7.1.2) $cd /usr/local/src/Python-3.6.3 #./configure --prefix=/usr/local/python3 #make all #make install 5. 进入安装的绝对路径,检查是否安装成功 $ /usr/local/python3/bin/python3.6 -V Python 3.6.3 6.查看环境变量,启动python时默认按照PATH的顺序进行查找,在/usr/bin中的python此时为Python2.6的。 $echo $PATH /usr/lib/qt-3.3/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin:/home/gordon/bin 7.修改软连接,启动python时指向python3.6 修改软连接 ln -s /usr/local/python3/bin/python3 /usr/bin/python3 这里是为了python2与python3共存,所以建立的软连接是python3,如果只保留python3,那就直接备份python2,但是修改有yum就不能正常使用了,需要修改 yum的配置文件, 指定python2.6.6 操作如下: 1 备份python mv /usr/bin/python /usr/bin/python2.6.6 2 修改软连接 ln -s /usr/local/python3/bin/python3 /usr/bin/python 3 升级完python之后,yum就不好用了,需要修改/usr/bin/yum,改为使用python2.6.6 #!/usr/bin/python2.6.6 8为了只用时输入方便可以添加alias [root@mail ~]# cd ~ [root@mail ~]# cat .bashrc # .bashrc # User specific aliases and functions alias rm='rm -i' alias cp='cp -i' alias mv='mv -i' alias py='/usr/bin/python3' alias python3='/usr/bin/python3' # Source global definitions if [ -f /etc/bashrc ]; then . /etc/bashrc fi [root@mail ~]# source .bashrc 9. 验证默认是否启动python3.6 $ python3 -V Python 3.6.3
centos通过源码升级python版本2.7->3.6
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转载自blog.csdn.net/lihuaichen/article/details/78873266
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