[PAM Error 7] Authentication failure

JupyterHub
1

Hi,
I installed Jupyterhub 4.0.2 in my pc linux (with Ubuntu 22.04 o.s.).
I can to access to Jupyterhub by my system user login.
So, I want to make any other user (for example “salvatore”) that can access to Jupyterhub.
I make a generic user, add this user to “shadow group”, and I verify by:

“cat /etc/passwd | grep /home | grep -v false | cut -d: -f1 | xargs groups”

that this is true (salvatore is on shadow group)
But when I access to Jupyterhub by salvatore, I see this error:

[W 2023-10-12 10:07:17.209 JupyterHub auth:1112] PAM Authentication failed (salvatore@::ffff:127.0.0.1): [PAM Error 7] Authentication failure
[W 2023-10-12 10:07:17.210 JupyterHub base:843] Failed login for salvatore

Why ?

2

ok. I solved !
I must to start jupyterhub with sudo command:

sudo jupyterhub

Bye !