如何在ubuntu 24.04上安装配置x11vnc以便远程访问

在ubuntu 24.04上安装x11vnc的方法（经过验证04/25/2024）

sudo apt update

sudo apt install x11vnc

x11vnc -storepasswd

下面的命令确认authentication文件的位置（示例中的uid 1000）

systemctl status display-manager.service

Apr 25 22:54:30 hwnga-VMware20-1 gdm-password] $4052$ : pam_unix(gdm-password:session): session opened for user hwnga(uid=1000) by hwnga(uid=0)

ubuntu24.04默认使用waylan,但是x11vnc对于wayland不太友好，需要切换到xorg。logout，登录时只点击用户名，不输入密码，在屏幕右下角有个小的齿轮图标，点击，然后选择"ubuntu on xorg"，再输入密码，登录。

下面的命令输出x11，证明从wayland成功切换到了xorg:

hwnga@hwnga-VMware20-1:~ $echo$ XDG_SESSION_TYPE

x11

试着在用户hwnga下运行以下命令：

/usr/bin/x11vnc -auth /var/run/gdm3/auth-for-hwnga-*/database -forever -loop -noxdamage -repeat -rfbauth /home/hwnga/.vnc/passwd -rfbport 5900 -shared

如果没有错误，则可以在另外机器上运行vncviewer，确认可以连接成功。

再创建x11vnc systemd service，如下：

Unit

Description=Start x11vnc at startup.

After=gdm.service

Service

Type=simple

User=hwnga

Group=hwnga

ExecStart=/usr/bin/x11vnc -auth /var/run/gdm3/auth-for-hwnga-*/database -forever -loop -noxdamage -repeat -rfbauth /home/hwnga/.vnc/passwd -rfbport 5900 -shared

Install

WantedBy=multi-user.target

运行下面的命令，启动x11vnc service

hwnga@hwnga-VMware20-1:~$ sudo systemctl daemon-reload

hwnga@hwnga-VMware20-1:~$ sudo systemctl enable x11vnc-hwnga.service

hwnga@hwnga-VMware20-1:~$ sudo systemctl start x11vnc-hwnga.service

hwnga@hwnga-VMware20-1:~$ sudo systemctl status x11vnc-hwnga.service

● x11vnc-hwnga.service - Start x11vnc at startup.

Loaded: loaded (/etc/systemd/system/x11vnc-hwnga.service; disabled; preset>

Active: active (running) since Thu 2024-04-25 23:20:19 CDT; 6s ago

Main PID: 9502 (x11vnc)

Tasks: 2 (limit: 29004)

Memory: 30.1M (peak: 55.4M)

CPU: 70ms

CGroup: /system.slice/x11vnc-hwnga.service

├─9502 /usr/bin/x11vnc -auth "/var/run/gdm3/auth-for-hwnga-*/datab>

└─9503 /usr/bin/x11vnc -auth "/var/run/gdm3/auth-for-hwnga-*/datab>

Apr 25 23:20:23 hwnga-VMware20-1 x11vnc $9503$ : 25/04/2024 23:20:23

Apr 25 23:20:23 hwnga-VMware20-1 x11vnc $9503$ : The VNC desktop is: hwnga-V>

Apr 25 23:20:23 hwnga-VMware20-1 x11vnc $9503$ : PORT=5900

Apr 25 23:20:23 hwnga-VMware20-1 x11vnc $9503$ : ********************************>

Apr 25 23:20:23 hwnga-VMware20-1 x11vnc $9503$ : Have you tried the x11vnc '-ncac>

Apr 25 23:20:23 hwnga-VMware20-1 x11vnc $9503$ : The scheme stores pixel data off>

Apr 25 23:20:23 hwnga-VMware20-1 x11vnc $9503$ : retrieval. It should work with >

Apr 25 23:20:23 hwnga-VMware20-1 x11vnc $9503$ : x11vnc -ncache 10 ...

Apr 25 23:20:23 hwnga-VMware20-1 x11vnc $9503$ : One can also add -ncache_cr for >

Apr 25 23:20:23 hwnga-VMware20-1 x11vnc $9503$ : More info: http://www.karlrunge.>

hwnga@hwnga-VMware20-1:~$

下面是安全访问 (如何你不在外网访问，不需要此步骤）：

先在ubuntu上安装openssh-server

sudo apt install openssh-server

sudo ufw allow ssh

sudo ufw allow 5900

sudo ufw enable

在window 上，安装mobaxterm, 开启tunelling。ssh server 是你的ubuntu的地址，端口22，用户名是ubuntu用户名。forward端口是你本地的一个未用的地址，比如6660。

在vnc reviewer上，使用localhost:6660来连接