Systemd

systemd-analyze
systemd-analyze blame
systemd-analyze plot > /tmp/plot.svg

systemd-bootchart

https://wiki.gentoo.org/wiki/Systemd#systemd-bootchart

https://wiki.archlinux.org/index.php/Improving_performance/Boot_process#Analyzing_the_boot_process

systemd-cgls
pstree

# SIGTERM
systemctl kill service-name.service

# SIGKILL
systemctl kill -s SIGKILL service-name.service

# HUP
systemctl kill -s HUP --kill-who=main service-name.service