마운트 출력의 의미 [중복]

$ mount
/dev/sda3 on / type ext4 (rw,errors=remount-ro,commit=0)
proc on /proc type proc (rw,noexec,nosuid,nodev)
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
none on /sys/fs/cgroup type tmpfs (rw)
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)
udev on /dev type devtmpfs (rw,mode=0755)
devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755)
none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880)
none on /run/shm type tmpfs (rw,nosuid,nodev)
none on /run/user type tmpfs (rw,noexec,nosuid,nodev,size=104857600,mode=0755)
none on /sys/fs/pstore type pstore (rw)
/dev/sda4 on /home type ext4 (rw,commit=0)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,noexec,nosuid,nodev)
systemd on /sys/fs/cgroup/systemd type cgroup (rw,noexec,nosuid,nodev,none,name=systemd)
gvfsd-fuse on /run/user/1000/gvfs type fuse.gvfsd-fuse (rw,nosuid,nodev,user=t)

mount의 출력 형식은 일련의 행으로, 각 행은 "A on B type C" 형식을 갖습니다.

내 이해가 맞나요?

• B는 마운트 지점입니다.
• C는 파일 시스템 유형입니다. C의 예로 는 ext4, proc, sysfs, tmpfs, fusectl, debugfs, securityfs, devtmpfs, devpts, pstore, binfmt_misc.cgroupfuse.gvfsd-fuse
• A는 무엇입니까? A의 예 는 /dev/sda3, proc, sysfs, none, udev, devpts, tmpfs, binfmt_misc입니다 systemd.gvfsd-fuse