在 CentOS 中将 python 3 设置为默认 python 版本

Question

I have installed python 3.6 on my CentOS machine by following the guide at https://linuxize.com/post/how-to-install-python-3-on-centos-7/ , which installs python 3 with the following:

sudo yum install rh-python36

The default python version, however, is still python 2. The guide mentions I can run python 3 by first running scl enable rh-python36 bash , and then python 3 will be used. However, this only works for that session - logging out and back in will revert back to python 2. According to How to set Python3.5.2 as default Python version on CentOS? , python 3 can be set as the default with the following:

sudo ln -fs /usr/bin/python3 /usr/bin/python

However, this doesn't work for me as for some reason I don't have any python3 file in /usr/bin/ - I only have python , python2 , python2.7 , python2.7-config , python2-config and python-config (despite installing python 3 with yum as above).

Answer 1

First, run

$ scl enable rh-python36 bash

to switch python version.

Second, run

$ which python

to find out the exact path of python3.6 binary.

Third, edit ~/.bashrc.

$ vim ~/.bashrc

and add below line.

alias python='/opt....(the path you found by "which python")'

and save the file.