Improve CLI and daemon lifecycle usability

docs/automation-examples.md

@@ -18,12 +18,11 @@ export GETH_HOME="${GETH_HOME:-$HOME/.local/share/geth/geth}"
 geth init
 geth daemon run >"$GETH_HOME/daemon.log" 2>&1 &
 daemon_pid=$!
+trap 'kill "$daemon_pid" 2>/dev/null || true' EXIT
 
 geth wait daemon --timeout-ms 30000
 geth doctor --json
 geth status --json
-
-trap 'kill "$daemon_pid" 2>/dev/null || true' EXIT
 ```
 
 Create a backup into a separate directory and validate that it can restore to a
@@ -106,13 +105,17 @@ manager mutation:
 
 ```sh
 geth daemon service print
-geth daemon service install --start
+geth daemon install
 geth wait daemon --timeout-ms 30000
-geth daemon service status
-geth daemon service stop
-geth daemon service uninstall
+geth daemon status
+geth daemon stop
+geth daemon uninstall
 ```
 
+For a disposable interactive test, `geth daemon run --ephemeral` creates and
+prints a temporary home. Other commands can target it explicitly with `geth
+--home <printed-path> ...`; normal Ctrl-C shutdown removes the state.
+
 Admin SSH keys remain outside geth state. Automation should pass public admin
 keys with `--admin-key` and use the matching private key only as an argument to
 the explicit signing command when an admin operation is intended: