systemd cheat sheet

systemd- bootdelay analyzing

Short summarize over boot duration system-analyze
Generate plot for systemd boot process system-analyze plot > boot.svg

firefox boot.svg
kernel log with delta in time dmesg --show-delta --color=always | less -R
correlate initramfs with kernel messages journalctl -b -o short-monotonic
sort systemd load times systemd-analyze blame
select specific initramfs service journalctl -b -o short-monotonic -u systemd-udev-settle.service
analyse with systemd-bootchart init=/lib/systemd/systemd-bootchart
the chart file is located under /run/log/bootchart

journalctl --root=/run/media/user/partitionname/ journalctl needs the actual root of the root partition and not the journal folder.