-bash: python: centos 6에 python3을 설치한 후 명령을 찾을 수 없습니다.

python3 설치를 마치면 python2 및 python3 명령을 사용할 수 있지만 python을 시도하면 명령을 찾을 수 없다는 메시지가 표시됩니다. 여기에 일부 출력이 있습니다.

[root@localhost bin]# python2
Python 2.7.5 (default, Apr 11 2018, 07:36:10) 
[GCC 4.8.5 20150623 (Red Hat 4.8.5-28)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> exit()
[root@localhost bin]# python3.6
Python 3.6.0 (default, Nov 13 2018, 00:07:36) 
[GCC 4.8.5 20150623 (Red Hat 4.8.5-28)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> 
[root@localhost bin]# python
-bash: python: command not found
[root@localhost bin]#

내가 파이썬을 시도하면

 [root@localhost bin]# whereis python
 python: /usr/bin/python2.7 /usr/bin/python /usr/bin/python.bak 
 /usr/lib/python2.7 /usr/lib64/python2.7 /etc/python /usr/include/python2.7 
 /usr/local/python /usr/local/python/bin/python3.6m 
 /usr/local/python/bin/python3.6 /usr/local/python/bin/python3.6m-config 
/usr/local/python/bin/python3.6-config /usr/share/man/man1/python.1.gz
[root@localhost bin]#

/usr/bin에서 ls -ls를 시도하면 /usr/python/bin/python3 출력이 깜박입니다.

[root@localhost bin]# ls -l
0 lrwxrwxrwx. 1 root root         23 Nov 13 01:05 python -> 
/usr/python/bin/python3

$PATH 에코

[root@localhost /]# echo $PATH
/usr/local/python/bin/:/usr/local/python/bin/:/usr/local/sbin:
/usr/local/bin:/usr/sbin:/usr/bin:/root/bin