grep -rl "#systemd" ~/writing ~/notes
#systemd
1 post and 3 notes tagged systemd.
20261 post
- 9 min
Debugging a systemd service without guessing
A repeatable path from failed unit to useful evidence using systemctl, journalctl, exit status, and the unit's real runtime context.
Notes
- TIL
MemoryHigh is a slope, MemoryMax is a cliff
A container that runs out of memory did not run out of machine memory — it hit a limit recorded under /sys/fs/cgroup, which is why free -h inside the container…
- TIL
Core dumps are free until you need one
The kernel refuses to write core dumps by default (RLIMIT_CORE starts at 0), which is why production crashes usually leave nothing behind. systemd raises that…
- TIL
Why is boot slow? Ask for the critical chain
systemd-analyze blame sorts units by how long they took to start, but units start in parallel, so the slowest one often isn't what delayed boot. This shows the…