##  Linux  #############################

  * authorized_keys

    NOTE : If ssh key is refused, check permissions !!

    recommendation 
      home            : 755
      .ssh            : 700
      authorized_keys : 600


  * check the version of RedHat

    /etc/redhat-release


  * install sshd by apt get
  +---------------------------------------+
  | $ sudo apt-get install openssh-server |
  +---------------------------------------+

  * add sudo user
  +----------+
  | $ su -   |
  | $ visudo |
  +----------+

  * Lunar Linux virtio setting

    kernel configuratoin

    +---------------------------------------------+
    | device Driver                               |
    | -> Block devices                            |
    |      Virtio block driver                    |
    | -> Network device support                   |
    |      Virtio network driver                  |
    | -> Charter devices                          |
    |      VirtIO Random Number Generator support |
    |                                             |
    | Virtualization                              |
    | -> all                                      |
    +---------------------------------------------+


  * set Emacs key bind

    install gconf-editor
    +----------------------------+
    | $ yum install gconf-editor |
    +----------------------------+
    open gconf-editor
    +----------------+
    | $ gconf-editor |
    +----------------+
    or
    Applications -> System Tools -> Configuration Editor
    at menu bar

    desktop- > gnome ->  interface ->  gtk_key_theme
    change "Default" -> "Emacs"


  * hide desktop icons

    open gconf-editor

    apps -> nautilus ->  interface ->  gtk_key_theme
    change setting