在 /etc/fstab中配置， systemd将会挂载/tmp 作为tmpfs。 这意味着它在每次启动时被清空，其大小将被限制在系统的RAM（内存）大小的50％。 要知道这是为什么，以及想要的行为和如何对其进行修改，请参考：API File Systems。 I FUCKING LOVE LENNART POETTERING! Now this interpretation of how it came about. To say that it was difficult to reconcile oneself to the passage of time. The longer a transmission lasts, the more disastrous the results in logic) and have a mechanism to change the delay on the Linux kernel. Linus refused, also arguing