Redhat从源安装Python2.7.12

有些时候，由于操作系统的不完整，我们无法直接安装binary的Python，而需要从Python源代码进行编译和安装。

以Redhat系统从源安装Python2.7.12为例。

# Step 1, Install compilers and related toolsyum groupinstall -y "development tools"# Step 2, Install libraries needed to compile all features of Pythonyum install -y zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel expat-devel# Step 3, Download python 2.7.12wget http://python.org/ftp/python/2.7.12/Python-2.7.12.tar.xz# Step 4, Decompress the downloaded filetar xf Python-2.7.12.tar.xzcd Python-2.7.12# Step 5, Configure python 2.7.12 source code./configure --prefix=/usr/local --enable-unicode=ucs4 --enable-shared LDFLAGS="-Wl,-rpath /usr/local/lib"# Step 6, Install python 2.7.12make && make altinstall# Step 7, Set python 2.7.12 as default pythonsudo rm -rf /usr/bin/pythonln -s /usr/local/bin/python2.7 /usr/bin/python# Step 8, Download pip install scriptwget --no-check-certificate https://bootstrap.pypa.io/get-pip.py# Step 9, Install pippython get-pip.py --index-url=http://pypi.python.org/simple/ --trusted-host pypi.python.org# Step 10, Make Sure yum configuration is NOT changedsed '1d' /usr/bin/yum > tmpfile; sed -i '1 i\#!/usr/bin/python2.6' tmpfile; mv tmpfile /usr/bin/yum; sudo chmod 755 /usr/bin/yum

在第6步中，有可能出现make(等同于make all)命令无线循环的问题。这时，可以参考这个网页：https://stackoverflow.com/questions/11179203/python-build-goes-into-infinite-loop。例如，使用date命令，将系统时间修改成当前时间：

date +%Y%m%d -s "20170809"