What do the filesystem entries mean in /etc/fstab



  • /etc/fstab man page: http://bit.ly/2r1gzB2
    fsck man page: http://bit.ly/2r9s1rJ

    # <file system> <mount point>   <type>  <options>       <dump>  <pass>
    

    eg: UUID=7f26dc03-6754-488e-bbqf-c2te158e21cf / ext4 errors=remount
    -ro 0 1

    The UUID is used in front of these entries, it is the Universally Unique Identifier for devices.

    <file system>, LABEL or UUID, for file system this is the name of the device, e.g: /dev/sdb1, etc. I could give /dev/sdb1, the label of "joebloggs" and that would be the first field, or use the UUID of the device.

    LABEL=<label> or UUID=<uuid> may be given instead of a device
    name. This is the recommended method, as device names are often
    a coincidence of hardware detection order, and can change when
    other disks are added or removed.

    <mount point> The directory where the device is mounted. e.g /oracle

    <type> The type of file system, e.g ext4, xfs, btrfs, f2fs, vfat, ntfs, hfs‐
    plus, tmpfs, sysfs, proc, iso9660, udf, squashfs, nfs, cifs, etc.

    <options> Add options for that particular file system type e.g errors=remount-ro

    <dump> Historically used by the dump command.

    <pass> Determines the order that fsck uses to check filesystems.


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