permission denied

/usr/bin/python: bad interpreter: Permission denied error

sudo  chmod +x
sudo chmod 777

http://tieba.baidu.com/p/3243747582L

sudo apt-get install –reinstall python3.5

在更新python的时候需要建立新的连接文件
sudo ln -s /usr/bin/python3.4 /usr/bin/python.

最终解决方法：

sudo rm -rf /usr/bin/python
sudo ln -s /usr/bin/python2.6 /usr/bin/python

https://www.jianshu.com/p/dcf2c9dd61b7