>/dev/shm is a tmpfs mount. It's not synthetic. It's basically "/tmp but it uses your RAM so it's not essentially-unbounded /dev/shm is for the shared-memory f

>/dev/shm is a tmpfs mount. It's not synthetic. It's basically "/tmp but it uses your RAM so it's not essentially-unbounded /dev/shm is for the shared-memory facility. It's not used as a temporary filesystem by anything (possibly excepting the user). FreeBSD's shm implementation actually does support the read/write interface, but it doesn't expose a filesystem. >, so we didn't put it on /tmp because then stupid legacy programs might OOM the kernel." >Yeah, but the output of df(8) re: tmpfs is meaningless, /tmp is tmpfs on Fedora and other distros. The size parameter on mount can limit available 'storage' so the free 'space' df output can be useful.