所以我已经在CentOS上正确安装了Python 2.7，pip配置为在自定义位置安装软件包。 到目前为止，一切都有效，但现在我正在安装Jupyter：
pip install jupyter
我得到了这个输出：
Collecting jupyter
/usr/local/lib/python2.7/site-packages/pip-7.1.2-py2.7.egg/pip/_vendor/requests/packages/urllib3/util/ssl_.py:90: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. For more information, see https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning.
InsecurePlatformWarning
Using cached jupyter-1.0.0-py2.py3-none-any.whl
Collecting notebook (from jupyter)
Using cached notebook-4.1.0-py2.py3-none-any.whl
Collecting ipywidgets (from jupyter)
Using cached ipywidgets-4.1.1-py2.py3-none-any.whl
Collecting nbconvert (from jupyter)
Using cached nbconvert-4.1.0-py2.py3-none-any.whl
Collecting ipykernel (from jupyter)
Using cached ipykernel-4.3.1-py2.py3-none-any.whl
Collecting jupyter-console (from jupyter)
Using cached jupyter_console-4.1.1-py2.py3-none-any.whl
Collecting qtconsole (from jupyter)
Using cached qtconsole-4.2.0-py2.py3-none-any.whl
Collecting traitlets (from notebook->jupyter)
Using cached traitlets-4.1.0-py2.py3-none-any.whl
Collecting tornado>=4 (from notebook->jupyter)
Collecting jupyter-client (from notebook->jupyter)
Using cached jupyter_client-4.2.1-py2.py3-none-any.whl
Collecting nbformat (from notebook->jupyter)
Using cached nbformat-4.0.1-py2.py3-none-any.whl
Collecting jupyter-core (from notebook->jupyter)
Using cached jupyter_core-4.1.0-py2.py3-none-any.whl
Collecting terminado>=0.3.3 (from notebook->jupyter)
Collecting ipython-genutils (from notebook->jupyter)
Using cached ipython_genutils-0.1.0-py2.py3-none-any.whl
Collecting jinja2 (from notebook->jupyter)
Using cached Jinja2-2.8-py2.py3-none-any.whl
Collecting ipython>=4.0.0dev0 (from ipywidgets->jupyter)
Using cached ipython-4.1.2-py2-none-any.whl
Collecting pygments (from nbconvert->jupyter)
Using cached Pygments-2.1.3-py2.py3-none-any.whl
Collecting mistune!=0.6 (from nbconvert->jupyter)
Using cached mistune-0.7.2-py2.py3-none-any.whl
Collecting decorator (from traitlets->notebook->jupyter)
Using cached decorator-4.0.9-py2.py3-none-any.whl
Collecting certifi (from tornado>=4->notebook->jupyter)
Using cached certifi-2016.2.28-py2.py3-none-any.whl
Collecting backports-abc>=0.4 (from tornado>=4->notebook->jupyter)
Using cached backports_abc-0.4-py2.py3-none-any.whl
Collecting backports.ssl-match-hostname (from tornado>=4->notebook->jupyter)
Collecting singledispatch (from tornado>=4->notebook->jupyter)
Using cached singledispatch-3.4.0.3-py2.py3-none-any.whl
Collecting pyzmq>=13 (from jupyter-client->notebook->jupyter)
Collecting jsonschema!=2.5.0,>=2.0 (from nbformat->notebook->jupyter)
Using cached jsonschema-2.5.1-py2.py3-none-any.whl
Collecting ptyprocess (from terminado>=0.3.3->notebook->jupyter)
Using cached ptyprocess-0.5.1-py2.py3-none-any.whl
Collecting MarkupSafe (from jinja2->notebook->jupyter)
Collecting pickleshare (from ipython>=4.0.0dev0->ipywidgets->jupyter)
Using cached pickleshare-0.6-py2.py3-none-any.whl
Collecting simplegeneric>0.8 (from ipython>=4.0.0dev0->ipywidgets->jupyter)
Collecting setuptools>=18.5 (from ipython>=4.0.0dev0->ipywidgets->jupyter)
Using cached setuptools-20.2.2-py2.py3-none-any.whl
Collecting pexpect (from ipython>=4.0.0dev0->ipywidgets->jupyter)
Collecting six (from singledispatch->tornado>=4->notebook->jupyter)
Using cached six-1.10.0-py2.py3-none-any.whl
Collecting functools32 (from jsonschema!=2.5.0,>=2.0->nbformat->notebook->jupyter)
Collecting path.py>=6.2 (from pickleshare->ipython>=4.0.0dev0->ipywidgets->jupyter)
Using cached path.py-8.1.2-py2.py3-none-any.whl
Installing collected packages: decorator, ipython-genutils, traitlets, certifi, backports-abc, backports.ssl-match-hostname, six, singledispatch, tornado, jupyter-core, pyzmq, jupyter-client, functools32, jsonschema, nbformat, pygments, mistune, MarkupSafe, jinja2, nbconvert, path.py, pickleshare, simplegeneric, setuptools, ptyprocess, pexpect, ipython, ipykernel, terminado, notebook, ipywidgets, jupyter-console, qtconsole, jupyter
Successfully installed MarkupSafe-0.23 backports-abc-0.4 backports.ssl-match-hostname-3.5.0.1 certifi-2016.2.28 decorator-4.0.9 functools32-3.2.3.post2 ipykernel-4.3.1 ipython-4.1.2 ipython-genutils-0.1.0 ipywidgets-4.1.1 jinja2-2.8 jsonschema-2.5.1 jupyter jupyter-client-4.2.1 jupyter-console-4.1.1 jupyter-core-4.0.6 mistune-0.7.2 nbconvert-4.1.0 nbformat-4.0.1 notebook-4.1.0 path.py-8.1.2 pexpect-4.0.1 pickleshare-0.6 ptyprocess-0.5.1 pygments-2.1.3 pyzmq-15.2.0 qtconsole-4.2.0 setuptools-20.2.2 simplegeneric-0.8.1 singledispatch-3.4.0.3 six-1.10.0 terminado-0.6 tornado-4.3 traitlets-4.1.0
但我的问题是，即使pip说安装一切顺利，我也没有得到jupyter命令行工具。如果我从命令行运行jupyter，我会得到“找不到命令”。 有什么想法可能会发生这种情况吗？
使用更多信息进行修改
使用Shell：bash
type jupyter的输出：
bash: type: jupyter: not found
find / -name jupyter的结果：找不到任何内容