Re: Query re: disk free (df) output
> I suppose I could've been more specific: what might a "shm" be?
,----[ /usr/src/linux/Documentation/devices.txt ]
| The following names are reserved for mounting special filesystems
| under /dev. These special filesystems provide kernel interfaces that
| cannot be provided with standard device nodes.
| /dev/shm tmpfs POSIX shared memory maintenance access
The linux kernel implements shared memory with the help of a minimal
filesystem which is mounted in /dev/shm.
More information about POSIX shared memory can be found in the
relevant man pages,
,----[ apropos shm ]
| shm_open (3) - Create/open or unlink POSIX shared memory objects
| shm_unlink (3) - Create/open or unlink POSIX shared memory objects
| shmat (2) - shared memory operations
| shmctl (2) - shared memory control
| shmdt (2) - shared memory operations
| shmget (2) - allocates a shared memory segment
| shmop (2) - shared memory operations