root@host:~# ls -lha /usr/bin/python*
lrwxrwxrwx 1 root root   24 Oct  9 16:02 /usr/bin/python -> /etc/alternatives/python
lrwxrwxrwx 1 root root    9 Dec 10  2015 /usr/bin/python2 -> python2.7
-rwxr-xr-x 1 root root 3.4M Nov 19  2016 /usr/bin/python2.7
lrwxrwxrwx 1 root root    9 Mar 23  2016 /usr/bin/python3 -> python3.5
-rwxr-xr-x 2 root root 4.3M Sep  7 22:09 /usr/bin/python3.5
-rwxr-xr-x 2 root root 4.3M Sep  7 22:09 /usr/bin/python3.5m
lrwxrwxrwx 1 root root   10 Mar 23  2016 /usr/bin/python3m -> python3.5m
root@host:~# ls -l /etc/alternatives/python
lrwxrwxrwx 1 root root 16 Oct  9 16:02 /etc/alternatives/python -> /usr/bin/python3