我停止了Jupyter服务器，并运行命令jupyter kernel remove <kernel name>来删除内核，该命令在显示几行后会永远挂在那里：
[rxie@cedgedev03 bin]$ jupyter kernelspec list
Available kernels:
spark1.6_conda_python2 /usr/local/share/jupyter/kernels/spark1.6_conda_python2
spark2.3_conda_python2 /usr/local/share/jupyter/kernels/spark2.3_conda_python2
spark23-conda /usr/local/share/jupyter/kernels/spark23-conda
python3 /usr/share/jupyter/kernels/python3
[rxie@cedgedev03 bin]$ jupyter kernel remove python3
[KernelApp] Starting kernel 'python3'
[KernelApp] Connection file: /run/user/10155/jupyter/kernel-35052ab9-4d4c-4316-b6d6-ce400c7b0bbc.json
[KernelApp] To connect a client: --existing kernel-35052ab9-4d4c-4316-b6d6-ce400c7b0bbc.json
切换到sudo，但仍挂起
出什么问题了？