升级python到3.7.3

1.安装编译环境包（防止出现安装错误）

yum install gcc-c++ gcc make cmake zlib-devel bzip2-devel openssl-devel ncurse-devel libffi-devel -y

2.在线下载Python3.7源码包

#进入tmp目录

cd /tmp

#下载python3.7.3

wget https://www.python.org/ftp/python/3.7.3/Python-3.7.3.tar.xz

3.解压并配置

#解压

tar Jxvf Python-3.7.3.tar.xz

#进入python3.7.3目录

cd Python-3.7.3

#创建目录

mkdir -p /usr/local/python3

#配置（指定安装目录）

./configure --prefix=/usr/local/python3 --enable-optimizations

4.编译及安装

make && make install

5.更换系统默认Python版本

1).备份原系统旧版本python

mv /usr/bin/python /usr/bin/python.bak

mkdir /usr/bin/pip

mv /usr/bin/pip /usr/bin/pip.bak

2).配置环境变量：创建新版本Python和pip的软链接

ln -s /usr/local/python3/bin/python3.7 /usr/bin/python

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

3).查看python版本

python -V

6.修改yum功能

因为yum的功能依赖Pyhon2，现在更改默认Python版本后会导致yum无法正常工作，所以进行以下3处修复

sed -i '1s/python/python2.7/g' /usr/bin/yum

sed -i '1s/python/python2.7/g' /usr/libexec/urlgrabber-ext-down

升级make

wget http://mirrors.ustc.edu.cn/gnu/make/make-4.3.tar.gz

tar xf make-4.3.tar.gz

cd make-4.3/

./configure --prefix=/usr/local/make

make

make install

cd /usr/bin/

mv make make.bfs

ln -sv /usr/local/make/bin/make /usr/bin/make

make -v

升级glibc

wget http://ftp.gnu.org/gnu/glibc/glibc-2.29.tar.gz

tar zxf glibc-2.29.tar.gz

cd glibc-2.29/

mkdir build

cd build/

../configure --prefix=/usr

make -j2

make install