commandline session
$mountpoint
Usage: mountpoint [-q] [-d] [-x] path
$mountpoint /
/ is a mountpoint
$mountpoint /var
/var is not a mountpoint
$mountpoint /usr
/usr is not a mountpoint
$mountpoint -x /dev/sda1
8:1
$mountpoint -x /dev/sda2
8:2
$mountpoint -x proc
mountpoint: proc: No such file or directory
$mountpoint -x /proc/
mountpoint: /proc/: not a block device
$mountpoint /proc/
/proc/ is a mountpoint
$mountpoint tmpfs
mountpoint: tmpfs: No such file or directory
$mountpoint -x tmpfs
mountpoint: tmpfs: No such file or directory
$mountpoint /run/shm/
/run/shm/ is a mountpoint
$mountpoint /run/
/run/ is a mountpoint
$mountpoint /dev/
/dev/ is a mountpoint
$
inner working