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/*!
//! [instructions]
    Plug the micro-SD card or reader into the development host PC,
    and use the following command to find out its device name:

    \code
        lsblk -d
    \endcode

    Removable devices such as SD cards have a value '1' in
    the \e RM column.

    \warning \b{Make very sure you select the right device. Selecting
    the wrong one can result in a wiped hard drive}.

    Typical device names for SD cards include \c {sdb} and
    \c {mmcblk0}. The full device path is \c {/dev/} followed by
    the name. Replace \b XXX with the device name in below
    instructions.

    Now make sure the micro-SD card is not mounted:

    \code
        umount /dev/XXX
    \endcode
//! [instructions]
*/