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Before a user can access a file on a Unix-like machine, the file system that contains it needs to be mounted with the mount command. Frequently mount is used for SD card, USB storage, DVD and other removable storage devices. The mount command instructs the operating system that a file system 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.== Use == Display all mounted partitions: $ mount proc on /proc type proc (rw) sysfs on /sys type sysfs (rw) devpts on /dev/pts type devpts (rw,gid=5,mode=620) /dev/sda1 on /boot type ext3 (rw) /tmp on /var/tmp type none (rw,noexec,nosuid,bind) 10.4.0.4:/srv/export/setup_server on /nfs/setup_server type nfs (ro,addr=10.4.0.4) This example will mount the second partition of a HDD (hard disk drive): $ mount /dev/hda2 /media/PHOTOS and will unmount (by referring to the physical disk partition) : $ umount /dev/hda2 or (by referring to the mount point) $ umount /media/PHOTOS To remount a partition with specific options: $ mount -o remount,rw /dev/hda2 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Mount (Unix)」の詳細全文を読む スポンサード リンク
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