# 遠端桌面 Remote Desktop

:::info
非必要請盡量使用 command line 操作電腦
:::

## Server (要連線的機器)

1. 下載vino並更改設定

    sudo apt install vino

    gsettings set org.gnome.Vino require-encryption false
    gsettings set org.gnome.Vino prompt-enabled false
    gsettings set org.gnome.Vino authentication-methods "['vnc']"
    gsettings set org.gnome.Vino lock-screen-on-disconnect false
    gsettings set org.gnome.Vino vnc-password $(echo -n "nycuorcaauv"|base64)

2. 讓vino-server在開機時自動啟動

    mkdir -p ~/.config/autostart
    sudo vim ~/.config/autostart/vino-server.desktop

    [Desktop Entry]
    Type=Application
    Name=Vino VNC server
    Exec=/usr/lib/vino/vino-server
    NoDisplay=true

3. 若有外接螢幕，到上一個步驟為止，vino-server就已經可以正常運作了，以下的操作為沒有外接螢幕的解法:

    sudo apt install xserver-xorg-video-dummy

    sudo vim /etc/X11/xorg.conf

    Section "Monitor"
    Identifier "Monitor0"
    HorizSync 28.0-80.0
    VertRefresh 48.0-75.0
    # 1920x1080 @ 60.00 Hz (GTF) hsync: 67.08 kHz; pclk: 172.80 MHz
    Modeline "1920x1080_60.00" 172.80 1920 2040 2248 2576 1080 1081 1084 1118 -HSync +Vsync
    EndSection

    Section "Device"
    Identifier "Card0"
    Option "NoDDC" "true"
    Option "IgnoreEDID" "true"
    Driver "dummy"
    EndSection

    Section "Screen"
    DefaultDepth 16
    Identifier "Screen0"
    Device "Card0"
    Monitor "Monitor0"
        SubSection "Display"
        Depth 16
        Modes "1920x1080"
        EndSubSection
    EndSection

    cat /etc/X11/default-display-manager # 確認display manager 是否為gdm3

    sudo vim /etc/gdm3/custom.conf

    WaylandEnable=false
    AutomaticLoginEnable = true
    AutomaticLogin = username

    sudo reboot

這種配置再次接上螢幕後會有黑屏的情況，若未來有需要再接上螢幕，需要將剛剛的設定改名或刪除

## Client (你的電腦)

1. 下載VNC viewer(或任何支援VNC的app): https://www.realvnc.com/en/connect/download/viewer/
2. 輸入server ip
3. 輸入剛才設定的密碼
4. 連線成功
5. 連不到的時候怎麼辦?
連不上可能是因為上一次的連線沒有正常結束，導致新的連線沒辦法建立，可以參考以下方式重新啟動vino server:

    pkill vino
    export DISPLAY=:0
    /usr/lib/vino/vino-server

https://askubuntu.com/questions/952265/how-to-restart-vino-or-my-desktop-environment