This section turned out a lot longer than I'd expected it to, but at the same time, I'm glad that Ubuntu, CentOS, Red Hat, and Debian now share a single init system.
Had I been writing this book four years ago, I might well have given up at the start of this section and gone climbing instead.
That said, it's over, and I hope you learned something about how systemd works in the last few pages.
One last thing to note is that, despite systemd being in all the big players now, it still has its critics, and you'll definitely come across the odd grumpy sysadmin who can't let go of his bash-script driven systems. My advice in these cases is to smile and nod; it's not worth it to get too involved—that or suggest they might like to give FreeBSD a go instead?
I have mixed memories of SysV and Upstart systems, most of...
