$ mount
/dev/md1 on / type ext4 (rw,errors=remount-ro)
proc on /proc type proc (rw,noexec,nosuid,nodev)
none on /sys type sysfs (rw,noexec,nosuid,nodev)
none on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
none on /dev type devtmpfs (rw,mode=0755)
none on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
none on /dev/shm type tmpfs (rw,nosuid,nodev)
none on /var/run type tmpfs (rw,nosuid,mode=0755)
none on /var/lock type tmpfs (rw,noexec,nosuid,nodev)
none on /lib/init/rw type tmpfs (rw,nosuid,mode=0755)
none on /var/lib/ureadahead/debugfs type debugfs (rw,relatime)
/dev/md0 on /boot type ext4 (rw)
/dev/md2 on /mnt/data type ext4 (rw)
/var/cache/apt/archives on /tmp/upgrade-rw-YB0_Vl/needs_bind_mount/var/cache/apt/archives type none (rw,bind)
/var/run on /tmp/upgrade-rw-YB0_Vl/needs_bind_mount/var/run type none (rw,bind)
/var/lock on /tmp/upgrade-rw-YB0_Vl/needs_bind_mount/var/lock type none (rw,bind)
/lib/init/rw on /tmp/upgrade-rw-YB0_Vl/needs_bind_mount/lib/init/rw type none (rw,bind)
none on /bin type aufs (rw,br:/tmp/upgrade-rw-YB0_Vl/bin:/bin=ro)
none on /boot type aufs (rw,br:/tmp/upgrade-rw-YB0_Vl/boot:/boot=ro)
none on /etc type aufs (rw,br:/tmp/upgrade-rw-YB0_Vl/etc:/etc=ro)
none on /initrd type aufs (rw,br:/tmp/upgrade-rw-YB0_Vl/initrd:/initrd=ro)
none on /lib type aufs (rw,br:/tmp/upgrade-rw-YB0_Vl/lib:/lib=ro)
none on /lib32 type aufs (rw,br:/tmp/upgrade-rw-YB0_Vl/lib32:/lib32=ro)
/var/run on /run type none (rw,bind)
/var/lock on /run/lock type none (rw,bind)
/dev/shm on /run/shm type none (rw,bind)