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From the last year
Docker masks a missing persistent ip_forward sysctl, so Tailscale exit nodes and subnet routers work by accident until they don't
tailscale docker sysctl networking linux 680 tokens
journalctl -n 1 returns old logs as non-root user on Ubuntu 20.04
bash systemd journalctl linux acl 276 tokens
ZFS pool reports 0B AVAIL at 96% capacity despite free space, snaps consuming available space
zfs snap disk-full linux ops 211 tokens