linode 客服说，在 linode 上这样切换到 systemd

[cevincheung]

1) switch to pv-grub

This would mean that you'd need to have an Ubuntu kernel installed and initramfs built (all of this will happen when you 'apt-get install linux-image'). You can then generate a menu.lst with: 'apt-get install grub; update-grub'.

2) Replace /sbin/init with systemd.

This would look something like:

mv /sbin/init /sbin/init.orig
ln -s /bin/systemd /sbin/init

中文：

1.apt-get install linux-image-3.xxxxx-generic grub systemd -y
2.mv /sbin/init /sbin/init.orig
3.ln -s /bin/systemd /sbin/init
4.reboot

[Yamade]

only 4 step?

[msg7086]

咦为什么要换内核？我在debian上直接就装上systemd了，用的linode内核。

$ uname -a
Linux - 3.18.3-x86_64-linode51 #1 SMP Fri Jan 23 09:57:22 EST 2015 x86_64 GNU/Linux
$ ll /sbin/init
lrwxrwxrwx 1 root root 20 1月 21 04:31 /sbin/init -> /lib/systemd/systemd*