Comment by guenthert

"and it gets the job done."

Until it doesn't. Fortunately I didn't have to debug it often, but when it was a lot of pain.

I prefer the fs under /tmp to be tmpfs. On the BBB is wasn't. I changed that and on next reboot the system didn't come up again -- no way to log in. Why? And what to do? Turns out I failed to state the fs_freq and fs_passno fields -- those aren't optional, but while the old mount tool tolerated their absence, systemd chose to interpret the fstab strictly, failed to mount that fs, consequently didn't reach the local-fs.target and hence didn't offer any way to log-in. Unlike Raspberry Pis, the BBB doesn't offer the possibility to remove (and mount and debug elsewhere) the boot medium. Fortunately, I found help on-line on how to connect a serial terminal to the BBB and interrupt the boot process, forcing the use of /bin/sh as init process...