ubuntu@ubuntu:/$ sudo mkdir /devsda3
ubuntu@ubuntu:/$ sudo mount /dev/sda3 /devsda3
ubuntu@ubuntu:/$ mount
/cow on / type overlayfs (rw)
proc on /proc type proc (rw,noexec,nosuid,nodev)
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
fusectl on /sys/fs/fuse/connections type fusectl (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)
/dev/sr0 on /cdrom type iso9660 (ro,noatime)
/dev/loop0 on /rofs type squashfs (ro,noatime)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev)
none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880)
none on /run/shm type tmpfs (rw,nosuid,nodev)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,noexec,nosuid,nodev)
gvfs-fuse-daemon on /home/ubuntu/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev,user=ubuntu)
/dev/sdd1 on /media/34BD-2E37 type vfat (rw,nosuid,nodev,uid=999,gid=999,shortname=mixed,dmask=0077,utf8=1,showexec,flush,uhelper=udisks)
/dev/sda2 on /mnt type ext3 (rw)
/dev on /mnt/dev type none (rw,bind)
/sys on /mnt/sys type none (rw,bind)
/proc on /mnt/proc type proc (rw)
/dev/sda3 on /devsda3 type ext3 (rw)
ubuntu@ubuntu:/$ cd /devsda3
ubuntu@ubuntu:/devsda3$ ls
bin   cdrom  etc   initrd      initrd.img.old  lost+found  mnt  proc  sbin     srv  tmp  var      vmlinuz.old
boot  dev    home  initrd.img  lib             media       opt  root  selinux  sys  usr  vmlinuz