hartman-server/docs

Administrators

Helper Scripts

Type sudo script- and use tab completion to access the following helper programs.

• sudo script-user-add <username> <password>
• sudo script-user-remove <username>
  • Optionally backup the user home directory to the array before removal.
• sudo script-user-reset-password <username> <password>
  • Reset a user's password if forgotten.
• sudo script-user-reset-x2go <username>
  • Completely reset the X2Go state for the user (destroys active/paused sessions).
• sudo script-user-unban <ip_address>
  • Temporarily unban an IP blocked by fail2ban.
• sudo script-files-permissions-set <username> <password> [PATH ...]
  • Set sane permissions on one or more paths, or the current directory if none provided.
• sudo script-files-permissions-reset [PATH ...]
  • Reset permissions on /mnt/data if no path is provided.
  • Use as a last resort to reset original permissions for shared data.
• sudo script-system-scheduled-restart <OnCalendar>
  • If <OnCalendar> not provided, defaults to *-*-* 01:30:00 (1:30 AM).
  • See Calendar Events for formatting.
  • Alerts users via notify-send (X2Go), wall (SSH), and adds a reminder to the MOTD.
• sudo script-user-reset-desktop <username>
  • Reset a user’s desktop (MATE configuration) to default.
  • Can also be run in user mode (without sudo) for personal accounts.
• sudo script-system-update
  • Update the server using the system package manager.
  • Best to run prior to scheduled reboot.

Cockpit Server Administration

Graphical system settings tool for monitoring and performing common tasks.

In an X2Go session, via a web browser at http://localhost:9090

Deploying stow server packages

Server scripts and configs are organized using GNU Stow packages and can be deployed from the root directory.

• Deploy system-wide MATE layout and themes: sudo stow --adopt -R -t / theme
• Deploy system-wide scripts: sudo stow --adopt -R -t / scripts
• Deploy system config files: sudo stow --adopt -R -t / config

Service management

Login via ssh or cat /etc/motd to view current service statuses.

• Start service: sudo systemctl start <service>
• Stop service: sudo systemctl stop <service>
• Enable service at boot: sudo systemctl enable <service>
• Disable service at boot: sudo systemctl disable <service>
• Restart service: sudo systemctl restart <service>
• Reload systemd daemon: sudo systemctl daemon-reload
• Read service file: sudo systemctl cat <service>

Virtual Machine Management

Windows VMs

• Use virt-manager to create a new VM, you will be asked for your credentials in the GUI.
  • Optionally copy an existing Windows .qcow2 image to avoid reinstalling Windows and virtio drivers.
  • If creating a new VM, Windows virtio virtualization drivers available are at /usr/share/virtio-win.
• Activate Windows using the UAB license in elevated PowerShell:

  slmgr -skms itis-msls.ad.uab.edu
  slmgr -ato

• Add the UAB DNS servers (138.26.5.2, 138.26.5.66) to the Windows network config to access UAB resources.

Enable Access to Samba Share (Windows Bug Workaround)

1. Open C:\Windows\system32\drivers\etc\hosts and copy its contents.
2. Paste into a new text document and add the appropriate blazerid and server IP lines.
3. Save as hosts (no extension).
4. Copy the new hosts file to C:\Windows\system32\drivers\etc\ (overwrite existing).
5. The user can now map/access their samba shares at \\blazerid\data and \\blazerid\blazerid.

Make an Existing Windows Account User an Administrator

1. Log in as the Azure AD user you want to make a local admin.
2. Log out and log in as a local admin.
3. In elevated PowerShell: net localgroup administrators AzureAD\blazerid@uab.edu /add

Enlarge VM Disk Space

• Add 20 GB to the Windows VM: sudo qemu-img resize /var/lib/libvirt/images/win11-5900.qcow2 +20G
• Add GParted ISO as boot device and expand the working partition.

Fixing no local display

Periodically the GPU hardware resets and crashes the local display manager.

To fix, login via ssh and run: sudo systemctl restart lightdm