Remote desktop between Ubuntus

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sudo apt install tigervnc-common
sudo apt install tigervnc-standalone-server
#vncpasswd
vncserver -localhost no -geometry 1280x720 :1
vncserver -list

Authentication required?

Empty ~/.vnc/passwd and

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#/etc/xdg/autostart$ sudo vi org.gnome.SettingsDaemon.Color.desktop
X-GNOME-Autostart-enabled=false

then reboot the server.

refer to:
https://blog.csdn.net/Naisu_kun/article/details/123007055