centOS 7下python2升级为p

###  centos 7 下升级python2到3

###  centos 7下python自带版本为2.7，但是今天需要用到3，所以升级了一下

###  首先安装依赖包 ~~~ yum -y groupinstall "Development tools" 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 ~~~ ###  然后根据需求选择自己需要的python3版本 ~~~ wget https://www.python.org/ftp/python/3.6.2/Python-3.6.2.tar.xz ~~~ ####  小提示:如果你的服务器显示找不到wget这个命令的话用yum安装一下就好。一般最小化安装会出现这个问题 ~~~ yum install -y wget ~~~

###  建立一个空文件夹

###  然后解压压缩包，进入该目录，安装Python3 ~~~ mkdir /usr/local/python3 tar -xvJf  Python-3.6.2.tar.xz cd Python-3.6.2 ./configure --prefix=/usr/local/python3 make && make install ~~~

###  然后创建一下软链接就好了

    [root@jinch Python-3.6.2]# ln -s /usr/local/python3/bin/python3 /usr/bin/python3     [root@jinch Python-3.6.2]# ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3     [root@jinch Python-3.6.2]# python3     Python 3.6.2 (default, Aug  3 2018, 15:15:12)     [GCC 4.8.5 20150623 (Red Hat 4.8.5-28)] on linux     Type "help", "copyright", "credits" or "license" for more information.     >>>

###  -over-