A service is behavior you can inspect
A service can be listed, queried, and, where supported and permitted, started, stopped, or restarted. systemctl list-units shows registered units. systemctl status <unit> reports the current unit snapshot; systemctl diagnose <unit> brings together supported diagnostic evidence. service <unit> status provides another status form.
Some units report status only. Others manage simulated network roles and listeners. An active unit is not automatically proof that a particular client can reach it: topology and firewall policy still matter. For a service experiment, compare status, process state, listener state, and a client request before and after an allowed change.
ProcessManager: a record of what is running
ProcessManager supplies GhostFrame’s simulated process view. Each record has a PID and can include a parent PID, state, kind, user, and name. The view connects app windows, terminal workloads, and service activity to identifiable running records.
ps shows active records. ps -a includes exited history, making a before-and-after comparison useful when you open and close an app. top presents a read-only process snapshot. These commands do not report real Windows CPU or memory usage or provide live resource monitoring.
kill is guarded cooperative control for eligible simulated apps and jobs. Core system and role-managed service records are protected. Use service controls for supported service actions instead of assuming every PID can be terminated.
Logging and the journal: look for evidence
Operational logging records messages that help explain application activity and diagnostics. The Ghost OS journal gives learners a queryable timeline of events such as process starts and exits, service actions, boot diagnostics, and security audit activity. Operational logs and the journal are related sources, with different purposes.
Use journalctl -b to focus on the current boot, journalctl -n 20 for recent entries, or journalctl -p warning to include warnings and more severe entries. journalctl -u <unit> narrows the view to a service. Inspecting /var/log/auth.log and /var/log/security.log can help relate supported authentication or permission events to their outcomes.
Logs are evidence to interpret, not a guarantee that every activity was recorded. Review their contents before sharing support information.
ClockService: wall time and elapsed time
ClockService provides the current UTC wall-clock value and an elapsed uptime. date displays clock time; uptime answers how long the current runtime has been running. bootctl status adds boot time, subsystem status, and current-boot diagnostic counts.
Wall-clock timestamps let you place events on a timeline. Elapsed time answers duration questions. The current clock foundation does not model clock drift, time acceleration, freezing, manual clock setting, or a synchronized NTP client.
The visible systemd-timesyncd.service is status-only and reports a local clock without synchronization. A simulated NTP server role does not change that into a synchronized client.
SystemServices: connect the observations
SystemServices is the shared system foundation that keeps the shell, desktop, files, clock, and process views connected. For a learner, the useful result is consistency: an app lifecycle can appear in the process view, a service action can appear in the journal, and file-backed content can be retrieved through a simulated HTTP service.
Try one investigation across those views: note the time, open an app, inspect its process record, close it, and compare the exited history and recent journal. Then explain which observations prove the action and which remain uncertain.