How to check all versions of python installed on osx and centos

Question

I just started setting up a centos server today and noticed that the default version of python on centos is set to 2.6.6. I want to use python 2.7 instead. I googled around and

Answer 1

Here is a cleaner way to show them (technically without symbolic links):

ls -1 /usr/bin/python* | grep '[2-3].[0-9]$'

Where grep filters the output of ls that that has that numeric pattern at the end ($).

Or using find:

find /usr/bin/python* ! -type l

Which shows all the different (!) of symbolic link type (-type l).

Answer 2

compgen -c python | grep -P '^python\d'

This lists some other python things too, But hey, You can identify all python versions among them.

Answer 3

The more easy way its by executing the next command:

ls -ls /usr/bin/python*

Output look like this:

/usr/bin/python           /usr/bin/python2.7        /usr/bin/pythonw
/usr/bin/python-config    /usr/bin/python2.7-config /usr/bin/pythonw2.7