Infrastructure
apt Could not get lock /var/lib/dpkg/lock-frontend: a 30-second diagnosis and recovery runbook
Diagnose the 'Could not get lock /var/lib/dpkg/lock-frontend' error in 30 seconds—pin it to a competing apt process, unattended-upgrades, cloud-init, or a stale lock. An on-call runbook covering whether to rm lock files, three copy-paste re