centos python 2.7 安装

 一开始有这个需求，是因为用 YaH3C 替代 iNode 进行校园网认证时，一直编译错误，提示找不到 Python 的某个模块，百度了一下，此模块是在 Python2.7 以上才有的，但是系统的自带的Python是2.6版本，难怪一直连不上网。于是，继续百度google，进行安装，后来又出现问题...在此开篇记录一下，权当备忘。

python2.7安装

探测机操作 升级python2.6到2.7  复制粘贴执行

cd /home/work/prober/src/lib/thirdparty
yum install xz unzip libcurl-devel zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gcc make -y
wget https://www.python.org/ftp/python/2.7.9/Python-2.7.9.tar.xz
tar xf Python-2.7.9.tar.xz
cd Python-2.7.9
./configure 
make all
make install
make clean  
make distclean 
/usr/local/bin/python2.7 -V  
mv /usr/bin/python /usr/bin/python2.6.6
ln -s /usr/local/bin/python2.7 /usr/bin/python
cd ..


修改yum

vi /usr/bin/yum
将文件头部的
#!/usr/bin/python
改成
#!/usr/bin/python2.6.6



安装setuptool pip  复制粘贴执行

https://pypi.python.org/pypi/setuptools页面最下面的有它的安装链接

cd /home/work/prober/src/lib/thirdparty
wget --no-check-certificate https://pypi.python.org/packages/source/s/setuptools/setuptools-12.0.3.tar.gz#md5=f07e4b0f4c1c9368fcd980d888b29a65 
tar xvf setuptools-12.0.3.tar.gz
cd setuptools-12.0.3
python setup.py install
cd ..
wget --no-check-certificate https://pypi.python.org/packages/41/27/9a8d24e1b55bd8c85e4d022da2922cb206f183e2d18fee4e320c9547e751/pip-8.1.1.tar.gz#md5=6b86f11841e89c8241d689956ba99ed7
tar -xzf pip-8.1.1.tar.gz
cd pip-8.1.1
python setup.py install
cd ..
# 升级pip
python -m pip install --upgrade pip

　　

查看python的版本

 python3.6安装

echo "source `which activate.sh`" >> ~/.bashrc

yum install perl-Digest-SHA

source ~/.bashrc

yum install xz unzip libcurl-devel zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gcc make -y
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 libffi-devel

yum install mysql-devel python-devel zlib-devel

cd /home/liujianzuo
wget https://www.python.org/ftp/python/3.8.0/Python-3.8.0a1.tar.xz
tar xf Python-3.8.0a1.tar.xz
cd Python-3.8.0a1
./configure --prefix=/home/liujianzuo/python3.8 --enable-optimizations
make
make install
make clean

wget https://files.pythonhosted.org/packages/1d/64/a18a487b4391a05b9c7f938b94a16d80305bf0369c6b0b9509e86165e1d3/setuptools-41.0.1.zip
unzip setuptools-41.0.1.zip
cd setuptools-41.0.1
/home/liujianzuo/python3.8/bin/python3 setup.py  install
cd ..
wget --no-check-certificate https://files.pythonhosted.org/packages/8b/8a/1b2aadd922db1afe6bc107b03de41d6d37a28a5923383e60695fba24ae81/pip-19.2.1.tar.gz
tar xf pip-19.2.1.tar.gz
cd pip-19.2.1

/home/liujianzuo/python3.8/bin/python3 setup.py  install

/home/liujianzuo/python3.8/bin/python3 -m pip install --upgrade pip


/home/liujianzuo/python3.8/bin/python3 -m pip install virtualenv

cd /home/work/probe_api
/home/liujianzuo/python3.8/bin/python3 /home/liujianzuo/python3.8/bin/virtualenv --no-site-packages -p /home/liujianzuo/python3.8/bin/python venv  #在项目下面创建虚拟目录
source venv/bin/activate

/home/work/probe_api/venv/bin/pip install -r requirements.txt

/home/liujianzuo/python3.8/bin/python3 -m pip install autoenv
echo "source /home/liujianzuo/python3.8/bin/activate.sh" >> ~/.bashrc  # 我的mac下 echo "source /Library/Frameworks/Python.framework/Versions/3.7/bin/activate.sh" >> ~/.zshrc
source ~/.bashrc

yum install perl-Digest-SHA

cat <<eof >.env
if [[ -e venv/bin/activate ]]
then
    source venv/bin/activate
fi
eof

virtualenv --no-site-packages -p /home/liujianzuo/python2.79/bin/python venv

#python  -V
Python 2.6.6

1.下载Python-2.7.3

#wget http://python.org/ftp/python/2.7.3/Python-2.7.3.tar.bz2

2.解压

#tar -jxvf Python-2.7.3.tar.bz2

3.更改工作目录

#cd Python-2.7.3

4.安装

#./configure
#make all
#make install
#make clean
#make distclean

5.查看版本信息

#/usr/local/bin/python2.7 -V

6.建立软连接，使系统默认的 python指向 python2.7

#mv /usr/bin/python /usr/bin/python2.6.6
#ln -s /usr/local/bin/python2.7 /usr/bin/python

7.重新检验Python 版本

#python -V

8解决系统 Python 软链接指向 Python2.7 版本后，因为yum是不兼容 Python 2.7的，所以yum不能正常工作，我们需要指定 yum 的Python版本

#vi /usr/bin/yum

将文件头部的
#!/usr/bin/python

改成
#!/usr/bin/python2.6.6

http://www.zhangchun.org/the-centos6-3-upgrade-python-to-2-7-3-

这篇教程就到这里了，但是不久就突然发现输入法图标不见了，然后打字没有候选框！iBus 崩了！再次进行搜索，又是版本问题 iBus也是不支持Python2.7的啊！

于是。。。

9.配置iBus

分别用 vi 打开下面两个文件，找到 exec python 那一行，把exec python 改为 exec python2.6 保存，退出。iBus在重启后就恢复正常了！是不是很开心？

#vi /usr/bin/ibus-setup

#vi/usr/libexec/ibus-ui-gtk