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VNC

VNC Program


  • Programs
    • Windows TightVNC Viewer : 완전무료
    • Windows RealVNC Viewer : 개인으로 쓰면 이걸 추천
      • Android App도 제공



VNC Server


VNC Server

  • Linux VNC Server 주로 사용
  • Window도 설정가능하지만, 별로 추천하지 않음
  • Window 의 Server 경우 아래 사용
    • Window는 Window 원격 데스크 톱
    • Chrome Remote Desktop Provider 사용 권장




Install VNC Server


  • X11 VNC Install 
    sudo apt update
sudo apt install x11vnc

x11vnc 와 vino

  • vino 보다는 x11vnc가 더 낫은듯함
  • 이외 RDP도 별도로 있음


Setup VNC Password


sudo mkdir -p /root/.vnc

sudo x11vnc -storepasswd /root/.vnc/passwd

VNC Password

  • root 기반으로 설정하는게 편함


Check VNC Envs


  • Display 1,0 확인
    1번 확인 
    ls /tmp/.X11-unix/

    X1


  • auth 확인
    /run/user/2002/gdm/Xauthority 확인 
    ps aux | grep '[X]org'

    root        4691  0.2  0.7 25435988 127516 tty2  Sl+  13:35   0:05 /usr/lib/xorg/Xorg vt2 -displayfd 3 -auth /run/user/2002/gdm/Xauthority -nolisten tcp -background none -noreset -keeptty -novtswitch -verbose 3


  • VNC Password 확인 
    sudo ls -l /root/.vnc/passwd


  • 3개 확인 
    echo "=== DISPLAY ==="
ls /tmp/.X11-unix/

echo "=== XAUTH ==="
ps aux | grep '[X]org'

echo "=== VNC PASSWORD ==="
sudo ls -l /root/.vnc/passwd


Setup VNC in Systemd


  • X11 Systemd 등록 
    sudo cat /etc/systemd/system/x11vnc.service

    sudo nano /etc/systemd/system/x11vnc.service

    [Unit]
Description=x11vnc VNC Server
After=display-manager.service
Requires=display-manager.service

[Service]
Type=simple
ExecStart=/usr/bin/x11vnc \
  -display :1 \
  -auth /run/user/2002/gdm/Xauthority \
  -rfbauth /root/.vnc/passwd \
  -forever \
  -shared \
  -noshm \
  -repeat

Restart=on-failure
RestartSec=3

[Install]
WantedBy=graphical.target

x11vnc 설정

  • 상위에서 반드시 설정 및 확인
    • -display :1
    • -auth /run/user/2002/gdm/Xauthority
    • -rfbauth /root/.vnc/passwd


  • Systemd Reload/Restart 
    sudo systemctl daemon-reload

    sudo systemctl restart x11vnc


  • Systemd status 확인
    sudo systemctl status x11vnc

    x11vnc.service - x11vnc VNC Server
     Loaded: loaded (/etc/systemd/system/x11vnc.service; enabled; preset: enabled)
     Active: active (running) since Mon 2026-08-10 13:48:14 KST; 46min ago
   Main PID: 11461 (x11vnc)
      Tasks: 1 (limit: 18383)
     Memory: 14.9M (peak: 18.0M)
        CPU: 3.318s
     CGroup: /system.slice/x11vnc.service
             └─11461 /usr/bin/x11vnc -display :1 -auth /run/user/2002/gdm/Xauthority -rfbauth /root/.vnc/passwd -forever -shared -noshm -repeat

Aug 10 14:31:39 localhost.localdomain x11vnc[11461]: 10/08/2026 14:31:39  tight               :     26 |    212095/  4136256 ( 94.9%)
Aug 10 14:31:39 localhost.localdomain x11vnc[11461]: 10/08/2026 14:31:39  PointerPos          :      1 |        12/       12 (  0.0%)
Aug 10 14:31:39 localhost.localdomain x11vnc[11461]: 10/08/2026 14:31:39  RichCursor          :      3 |      7200/     7200 (  0.0%)
Aug 10 14:31:39 localhost.localdomain x11vnc[11461]: 10/08/2026 14:31:39  TOTALS              :     37 |    219319/  4143480 ( 94.7%)
Aug 10 14:31:39 localhost.localdomain x11vnc[11461]: 10/08/2026 14:31:39 Statistics             events    Received/ RawEquiv ( saved)
Aug 10 14:31:39 localhost.localdomain x11vnc[11461]: 10/08/2026 14:31:39  PointerEvent        :     96 |       576/      576 (  0.0%)
Aug 10 14:31:39 localhost.localdomain x11vnc[11461]: 10/08/2026 14:31:39  FramebufferUpdate   :      7 |        70/       70 (  0.0%)
Aug 10 14:31:39 localhost.localdomain x11vnc[11461]: 10/08/2026 14:31:39  SetEncodings        :      1 |        48/       48 (  0.0%)
Aug 10 14:31:39 localhost.localdomain x11vnc[11461]: 10/08/2026 14:31:39  TOTALS              :    104 |       694/      694 (  0.0%)
Aug 10 14:31:39 localhost.localdomain x11vnc[11461]: 10/08/2026 14:31:39 destroyed xdamage object: 0x2e00005


Check VNC Port


  • VNC Server 동작확인 
    ss -lntp | grep 5900

    LISTEN 0      32           0.0.0.0:5900      0.0.0.0:*                                          
LISTEN 0      32              [::]:5900         [::]:*


VNC Clinet


  • VNC Client 접속