root@mount-test:/work/test# pwd
    /work/test
    root@mount-test:/work/test#
    root@mount-test:/work/test# whoami
    root
    root@mount-test:/work/test#
    root@mount-test:/work/test# ls
    root@mount-test:/work/test# ls -al
    Total 8
    drwxr-xr-x  2 root root 4096  6월 22 13:43 .
    drwxr-xr-x 11 root root 4096  6월 22 13:42 ..
    root@mount-test:/work/test#
    root@mount-test:/work/test# mkdir mnt
    root@mount-test:/work/test# ls -al
    Total 12
    drwxr-xr-x  3 root root 4096  6월 22 13:43 .
    drwxr-xr-x 11 root root 4096  6월 22 13:42 ..
    drwxr-xr-x  2 root root 4096  6월 22 13:43 mnt
    root@mount-test:/work/test#
    root@mount-test:/work/test# chmod 777 mnt
    root@mount-test:/work/test# ls -al
    Total 12
    drwxr-xr-x  3 root root 4096  6월 22 13:43 .
    drwxr-xr-x 11 root root 4096  6월 22 13:42 ..
    drwxrwxrwx  2 root root 4096  6월 22 13:43 mnt
    root@mount-test:/work/test#
    root@mount-test:/work/test#
    root@mount-test:/work/test# ls /dev/sdb*
    /dev/sdb  /dev/sdb1
    root@mount-test:/work/test#
    root@mount-test:/work/test# mount /dev/sdb1 mnt
    root@mount-test:/work/test# ls -al
    Total 24
    drwxr-xr-x  3 root root  4096  6월 22 13:43 .
    drwxr-xr-x 11 root root  4096  6월 22 13:42 ..
    drwxr-xr-x 12 root root 16384  1월  1  1970 mnt
    root@mount-test:/work/test#