Shulou(Shulou.com)06/02 Report--

Environment: centos7

Entering 2020, python2 is no longer maintained, so the newly purchased server will upgrade the python version after reinstalling the system. Here is a trick: install 3 with yum directly.

Go directly to the code:

Vi python2to3.sh

Yum install-y python3cd / usr/bin/mv python python2.bakln-sf python3 pythonsed-I's gift cards are used in the same way as the binthonbones in the usr/bin/yum.

After completion, the default installation is version 3.6.8.

However, some software may also need python2 to run yum installation, but the default python command is referenced python3, so syntax errors will be reported, so you can try the following

Cd / usr/bin/

Ln-sf python2.7 python

Switch back when the installation is finished.

Ln-sf python3 python

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