order of records in fstab is important because fsck(8), mount(8), and umount(8) sequentially iterate through fstab and mount in the order defined. Blank lines and comment lines beginning with a "#" are ignored. The space or tab-separated fields within each row must appear in a specific order: device-spec – The device name, label, UUID, or other means of specifying the partition or data source this entry refers to. mount-point – Where the contents of the device may be accessed after mounting; for swap partitions or files, this is set to none. fs-type – The type of file system to be mounted. options – Options describing various other aspects of the file system, such as whether it is automatically mounted at boot, which users may mount or access it, whether it may be written to or only read from, its size, and so forth; the special option defaults refers to a pre-determined set of options depending on the file system type. dump – A number indicating whether and how often the file system should be backed up by the dump program; a zero indicates the file system will never be automatically backed up. pass – A number indicating the order in which the fsck program will check the devices for errors at boot time: 0 - do not check 1 - check immediately during boot 2 - check after boot Missing values in the last two fields are interpreted as zeros. If necessary, space characters in the first, second, and fourth fields are indicated by a @ symbol; U+0040. Options common to all filesystems auto / noauto With the auto option, the device will be mounted automatically at bootup or when the mount -a command is issued. auto is the default option. For the device not to be mounted automatically, the noauto option is used in /etc/fstab. With noauto, the device can be only mounted explicitly. dev / nodev Controls behavior of the interpretation of block special devices on the filesystem. exec / noexec exec lets binaries that are on the partition be executed, whereas noexec is the opposite. noexec might be useful for a partition that contains no binaries, like /var, or contains binaries the user may not want to execute on the system, or that cannot even be executed on the system, as might be the case of a Windows partition. rw / ro Mount the filesystem in either