Render CLI v2.20+ render logs command stalls/hangs when run in parallel or with wide time windows. render metrics -r <id> does not exist despite being referenced in some guides. render ssh requires interactive mode and cannot be piped or scripted with heredocs.
For render logs: use narrow --start/--end time windows with --limit, and make sequential calls only (never parallel). For metrics: use the Render dashboard (service → Metrics tab) instead. For SSH: requires a real interactive terminal with TTY; use expect if automation is needed, but note it still requires SSH keys configured in the Render dashboard. For health check verification without SSH: confirm the deploy status went to 'live' (proves health checks passed) and check for boot log lines ('Listening on') in a narrow time window.