Hello.
I was trying to reproduce bugtracker's issue #4811 (which is, "suddenly cannot add users anymore, useradd fails!") by using a Zentyal server running in a Virtualbox.
I could not reproduce the bug, but I found another hint: I added several users, and then I deleted one user (in this case, "user10").
The home directory of "user 10" remains, and it looks like this:
drwxr-xr-x 15 att att 4096 Mär 13 23:10 att
drwx------ 2 office-assholesign domain users 4096 Mär 11 19:26 office-assholesign
drwx------ 2 office-cyprus domain users 4096 Mär 11 19:27 office-cyprus
drwx------ 2 office-cyprus2 domain users 4096 Mär 12 20:58 office-cyprus2
drwxrwx---+ 4 root domain users 4096 Mär 11 18:45 samba
drwx------ 2 user1 domain users 4096 Mär 11 19:21 user1
drwx------ 2 2513 domain users 4096 Mär 12 20:19 user10
drwx------ 2 user10-test2 domain users 4096 Mär 13 23:12 user10-test2
drwx------ 2 user11 domain users 4096 Mär 12 20:55 user11
drwx------ 2 user12 domain users 4096 Mär 12 20:56 user12
drwx------ 2 user13 domain users 4096 Mär 12 20:57 user13
drwx------ 2 user13 domain users 4096 Mär 12 20:56 user13-13
drwx------ 2 user14 domain users 4096 Mär 12 20:59 user14
drwx------ 2 user14-cyprus domain users 4096 Mär 12 20:57 user14-cyprus
drwx------ 2 user2 domain users 4096 Mär 12 20:16 user2
drwx------ 2 user3 domain users 4096 Mär 12 20:16 user3
drwx------ 2 user4 domain users 4096 Mär 12 20:17 user4
drwx------ 2 user5 domain users 4096 Mär 12 20:17 user5
drwx------ 2 user6 domain users 4096 Mär 12 20:17 user6
drwx------ 2 user7 domain users 4096 Mär 12 20:18 user7
drwx------ 2 user8 domain users 4096 Mär 12 20:18 user8
drwx------ 2 user9 domain users 4096 Mär 12 20:18 user9
root@virtualzentyal:/home#
You notice this strange "user10" ? -> drwx------ 2 2513 domain users 4096 Mär 12 20:19 user10
It is still there, in the home directory, despite I deleted the user.
Where is the /etc/passwd and /etc/shadow credentials of each user stored? I cannot find it in these files....... ?
I thought if I delete a user, the home directory ought to be deleted too, and the /etc/passwd and /etc/shadow "entries" - whereever in Zentyal they really are now - also ought not to carry around the deleted user?
Any hints appreciated...