linux:~ # cat /proc/mounts 
rootfs / rootfs rw 0 0
udev /dev tmpfs rw 0 0
devpts /dev/pts devpts rw 0 0
/dev/nbd1 / squashfs ro 0 0
proc /proc proc rw 0 0
proc /proc proc rw 0 0
sysfs /sys sysfs rw 0 0
debugfs /sys/kernel/debug debugfs rw 0 0
fusectl /sys/fs/fuse/connections fusectl rw 0 0