Mount (Unix)
In computing, mount is a command in various operating systems. Before a user can access a on a Unix-like machine, the on the device which contains the file needs to be mounted with the mount command. Frequently mount is used for SD card, USB storage, DVD and other removable storage devices. The command is also available in the EFI shell. The mount command instructs the operating system that a is ready to use, and associates it with a particular point in the overall file system hierarchy (its mount point) and sets options relating to its access. Mounting makes file systems, files, directories, devices and special files available for use and available to the user. Its counterpart umount instructs the operating system that the file system should be disassociated from its mount point, making it no longer accessible and may be removed from the computer. It is important to umount a device before removing it since changes to files may have only partially been written and are completed as part of the umount. The mount and umount commands require root user privilege to effect changes. Alternately, specific privileges to perform the corresponding action may have been previously granted by the root user. A file system can be defined as user mountable in the /etc/fstab file by the root user. To display all mounted partitions: mount /dev/hda2 /media/PHOTOS To unmount by referring to the physical disk partition: umount /media/PHOTOS To remount a partition with specific : $ mount -o remount,rw /dev/hda2 Bind mounting allows a filesystem hierarchy or a file to be mounted at a different mount point.
