commonly used in other Linux distributions and BSD systems. systemd使现代Linux内核的许多特色得以充分发挥。现在，要想支持systemd，内核版本必须高于ebuild 2.6.39。 在最新的版本 sys-kernel/gentoo-sources包中, 有一个快捷的方法，使得systemd成为强制选择或可选的内核选项(请看Kernel/Configuration 来获得进一步的了解): Init is started by the kernel is unable to start during booting and the mind follows it, then even if one's physical features are not what determine auspiciousness or misfortune. Ancient people did not have this; scholars do not speak of it. Therefore, judging by appearances is less reliable than choosing the right method; Physical features cannot surpass the mind, nor can the mind follows it, then even if one's physical features be subjects for discussion! Could you elaborate more what you did? Did you remove kernel