windows访问Ubuntu18.04远程桌面/access ubuntu18.04 remote desktop from windows

概述：
看视频教程上，访问ubuntu 21.10的远程桌面，只需要安装xrdp就可以
访问ubuntu 18.04的远程桌面，也只需要安装xrdp和xorgxrdp，然而实际操作的时候远不止如此

整理出需要安装的：

sudo apt install xserver-xorg-core
sudo apt install xserver-xorg-input-all
sudo apt install xrdp
sudo apt install xorgxrdp

不确定的部分:

sudo apt install ssh
sudo apt remove ufw
or
sudo ufw allow from any to any port 3389 proto tcp

需要修改的配置：

When Xrdp is installed, an SSL certificate key – ssl-cert-snakeoil.key – is placed in the /etc/ssl/private/ folder. We need to add the xrdp user to the ssl-cert group to make the file readable to the user.

sudo adduser xrdp ssl-cert

当在windows运行远程桌面，访问ubuntu桌面的时候，会不停的有提示框,诸如：

 

 

 这就需要配置下面两项，让ubuntu的polit(policy kit)允许以下行为:

sudo bash -c "cat >/etc/polkit-1/localauthority/50-local.d/45-allow-colord.pkla" <<EOF
[Allow Colord all Users]
Identity=unix-user:*
Action=org.freedesktop.color-manager.create-device;org.freedesktop.color-manager.create-profile;org.freedesktop.color-manager.delete-device;org.freedesktop.color-manager.delete-profile;org.freedesktop.color-manager.modify-device;org.freedesktop.color-manager.modify-profile;
ResultAny=no
ResultInactive=no
ResultActive=yes
EOF

sudo bash -c "cat >/etc/polkit-1/localauthority/50-local.d/47-allow-networkd.pkla" <<EOF
[Allow Network Control all Users]
Identity=unix-user:*
Action=org.freedesktop.NetworkManager.network-control
ResultAny=no
ResultInactive=no
ResultActive=yes
EOF

然后就可以远程访问Ubuntu18.04的桌面了：

 

  

参考文献：
xorgxrdp install issue:
https://c-nergy.be/blog/?p=13390
polkit configure:
https://askubuntu.com/questions/1355066/i-want-my-network-connections-immutable-instead-of-getting-system-policy-preve
adduser:
https://www.tecmint.com/install-xrdp-on-ubuntu/