After downloading jupyter lab, you need to set it up, especially when using a remote server, because there is no screen or browser at all.
New settings file
jupyter lab --generate-config
Set the internal parameters of the file
vim ~/.jupyter/jupyter_lab_config.py
Once you go in and make changes, you can also directly copy and paste them.
c.ServerApp.root_dir = '/home/workspace'
c.ServerApp.allow_remote_access = True
c.ServerApp.ip = '*'
c.LabApp.open_browser = False
c.ServerApp.port = 8701
start up
jupyter lab --allow-root