Filtering journalctl to a single unit and boot

Scrolling the whole journal to find one service’s last failure is wasted time. Scope it to the unit and the current boot, and the noise disappears.

bash

journalctl -u cloudflared -b -p warning --no-pager

-u picks the unit, -b limits output to the current boot, and -p warning drops everything below warning priority. Add -f to follow it live, or -b -1 to read the boot before the reboot that hid the evidence.