RHEL의 Pip 구문 오류가 유효하지 않습니다.

RHEL 인스턴스에 Python 패키지를 설치하려고 하는데 pippip 명령을 실행하려고 하면 이 오류가 발생합니다.
Pip은 이전에도 작동했지만 갑자기(무슨 짓을 했는지는 모르겠지만) 이렇게 실패하기 시작했습니다.

[root@universe: ~]# pip --version
Traceback (most recent call last):
  File "/usr/bin/pip", line 9, in <module>
    load_entry_point('pip==18.1', 'console_scripts', 'pip')()
  File "build/bdist.linux-x86_64/egg/pkg_resources.py", line 378, in load_entry_point
  File "build/bdist.linux-x86_64/egg/pkg_resources.py", line 2566, in load_entry_point
  File "build/bdist.linux-x86_64/egg/pkg_resources.py", line 2260, in load
  File "/usr/lib/python2.6/site-packages/pip-18.1-py2.6.egg/pip/_internal/__init__.py", line 40, in <module>
    from pip._internal.cli.autocompletion import autocomplete
  File "/usr/lib/python2.6/site-packages/pip-18.1-py2.6.egg/pip/_internal/cli/autocompletion.py", line 8, in <module>
    from pip._internal.cli.main_parser import create_main_parser
  File "/usr/lib/python2.6/site-packages/pip-18.1-py2.6.egg/pip/_internal/cli/main_parser.py", line 8, in <module>
    from pip._internal.cli import cmdoptions
  File "/usr/lib/python2.6/site-packages/pip-18.1-py2.6.egg/pip/_internal/cli/cmdoptions.py", line 75
    binary_only = FormatControl(set(), {':all:'})
                                               ^
SyntaxError: invalid syntax
[root@universe: ~]# 

pip 재설치를 시도했지만 python-setuptools종속 항목이 누락되었다는 오류가 발생했습니다.

[root@universe: ~]# yum install python-pip
Loaded plugins: product-id, rhnplugin, security, subscription-manager
There was an error communicating with RHN.
RHN Satellite or RHN Classic support will be disabled.

Error Message:
   Please run rhn_register as root on this client
Error Class Code: 9
Error Class Info: Invalid System Credentials.
Explanation: 
     An error has occurred while processing your request. If this problem
     persists please enter a bug report at bugzilla.redhat.com.
     If you choose to submit the bug report, please be sure to include
     details of what you were trying to do when this error occurred and
     details on how to reproduce this problem.

Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package python-pip.noarch 0:7.1.0-1.el6 will be installed
--> Processing Dependency: python-setuptools for package: python-pip-7.1.0-1.el6.noarch
--> Finished Dependency Resolution
Error: Package: python-pip-7.1.0-1.el6.noarch (epel)
           Requires: python-setuptools
 You could try using --skip-broken to work around the problem
 You could try running: rpm -Va --nofiles --nodigest
[root@universe: ~]# 

설치하려고 하면 python-setuptools패키지를 찾을 수 없다는 메시지가 표시됩니다.

[root@universe: ~]# yum install python-setuptools
Loaded plugins: product-id, rhnplugin, security, subscription-manager
There was an error communicating with RHN.
RHN Satellite or RHN Classic support will be disabled.

Error Message:
   Please run rhn_register as root on this client
Error Class Code: 9
Error Class Info: Invalid System Credentials.
Explanation: 
     An error has occurred while processing your request. If this problem
     persists please enter a bug report at bugzilla.redhat.com.
     If you choose to submit the bug report, please be sure to include
     details of what you were trying to do when this error occurred and
     details on how to reproduce this problem.

Setting up Install Process
No package python-setuptools available.
Error: Nothing to do
[root@universe: ~]#