I am attempting to mount and unmount devices on my VirtualBox openSUSE Leap 15.0 Linux virtual machine, using the "mount" and "umount" commands respectively. What I have found through Internet searches has not been successful up to this point. In particular, I would like to be able to unmount the "/dev/sda2" device on all of the directories it is associated with. On all of those directories, "/dev/sda2" is currently configured as read-only ( i.e., "ro" ), but I would like to unmount this device and mount it as read-write ( i.e., "rw" ) on all of those directories. Screenshots of the "df" command output and the "mount" command output are included as attachments for your consideration. Thank you for your help.