add matchbox‑wm

README.md

@@ -1,6 +1,6 @@
 # Linux
 
-- [Distros](#distros)
+- [Distro](#distro)
 - [Graphical Environment](#graphical-environment)
   - [Display Managers](#display-managers)
     - [cli - utils](#cli---utils)
@@ -11,6 +11,8 @@
   - [Archiving and Compression](#archiving-and-compression)
     - [tar](#tar)
   - [Users, Groups, and File permissions](#users-groups-and-file-permissions)
+  - [loginctl](#loginctl)
+    - [terminate-user](#terminate-user)
   - [Network Configuration](#network-configuration)
     - [hostname / hostnamectl](#hostname--hostnamectl)
     - [static ip](#static-ip)
@@ -28,7 +30,7 @@
   - [CLI Diagnostics and System Topology](#cli-diagnostics-and-system-topology)
     - [lspci](#lspci)
 
-## Distros
+## Distro
 
 - [Debian](./docs/distros/debian.md)
 - [Fedora](./docs/distros/fedora.md)
@@ -38,9 +40,12 @@
 
 ### Display Managers
 
-🎛️ A display manager is the graphical login screen you see when you boot your system.
+A display manager is a graphical login manager that:
 
-Main job: It handles user sessions — letting you log in, choose a user, select a desktop environment, and start the graphical session.
+- starts the Xorg or Wayland display server
+- shows a login screen (greeter)
+- authenticates the user
+- launches the user’s session (desktop environment or window manager)
 
 Examples:
 
@@ -48,6 +53,7 @@ Examples:
 - [GDM (GNOME Display Manager)](./docs/desktop-environments/gnome.md)
 - [SDDM](./docs/display-managers/sddm.md) - Used by [KDE](./docs/desktop-environments/kde.md)
 - LXDM (used by LXDE)
+- [matchbox-window-manager](./docs/display-managers/matchbox‑wm.md)
 
 #### cli - utils
 
@@ -144,6 +150,18 @@ usermod -a -G GROUPNAME USERNAME
 
 ```
 
+### loginctl
+
+*command belongs to systemd‑logind.*
+
+#### terminate-user
+
+terminate-user <username> Terminates all processes and sessions belonging to the specified user. This works on any system using systemd — including headless servers with no graphical environment. On headless systems, it closes SSH/TTY sessions and kills all user‑owned processes. On graphical systems, it also terminates Xorg/Wayland sessions and window managers.
+
+``` bash
+loginctl terminate-user <username>
+```
+
 ### Network Configuration
 
 #### hostname / hostnamectl

docs/display-managers/gdm.md

@@ -18,4 +18,4 @@ GDM (GNOME Display Manager) is the default graphical login manager for the GNOME
 **🧭 Usage and Configuration:**
 
 Default in Ubuntu, Fedora, and other GNOME-based distributions.
-Configurable via /etc/gdm/custom.conf for settings like autologin, Wayland enablement, and session defaults.
+Configurable via /etc/gdm/custom.conf for settings like auto login, Wayland enablement, and session defaults.

docs/display-managers/matchbox‑wm.md

@@ -0,0 +1,70 @@
+# matchbox‑wm
+
+matchbox‑wm is a minimal, single‑window X11 window manager originally designed for embedded systems, kiosks, and low‑resource devices. Unlike traditional window managers, it enforces a strict one‑window‑only model, making it ideal for fullscreen kiosk applications such as Chromium dashboards.
+
+**Key characteristics:**
+
+* Single‑window design: Only one application window is shown at a time, always fullscreen.
+
+* Extremely lightweight: Uses roughly 1–2 MB of RAM, suitable for low‑memory environments.
+
+* No desktop components: No panels, menus, compositors, notifications, or session daemons.
+
+* Deterministic behavior: Eliminates window management complexity, ideal for locked‑down kiosk workflows.
+
+* Runs on Xorg: Works as a tiny layer on top of the X11 display server.
+
+* Perfect for kiosks: Commonly paired with Chromium in kiosk mode for dashboards and appliances.
+
+## Install
+
+``` bash
+apt update
+apt install matchbox-window-manager xorg 
+```
+
+## Setup user
+
+Example to start matchbox-window-manager with chromium on user xxx login.
+
+``` bash
+mkdir -p /etc/systemd/system/getty@tty1.service.d
+```
+
+``` bash
+#/etc/systemd/system/getty@tty1.service.d/autologin.conf
+[Service]
+ExecStart=
+ExecStart=-/sbin/agetty --autologin xxx --noclear %I $TERM
+```
+
+``` bash
+sudo systemctl daemon-reload
+```
+
+``` bash
+# /home/xxx/.bash_profile
+if [ -z "$DISPLAY" ] && [ "$(tty)" = "/dev/tty1" ]; then
+    startx
+fi
+```
+
+``` bash
+# /home/xxx/.xinitrc
+                             
+eval $(dbus-launch --exit-with-session)
+export SSL_CERT_DIR=/etc/ssl/certs
+export SSL_CERT_FILE=/etc/ssl/certs/ca-certificates.crt
+
+matchbox-window-manager &
+
+chromium \
+  --kiosk \
+  --noerrdialogs \
+  --disable-infobars \
+  https://yoursite
+```
+
+``` bash
+chmod +x /home/xxx/.xinitrc
+```