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Connect to GNOME desktop environment via XRDP on CentOS 7 & Ubuntu 18

It might not make sense to use RDP to remote linux machines. The speed and performance all are not that good from my point to view. But in certain situation, you might need to use desktop on your remote Linux, then here comes this post.

1. CentOS 7





Commands to check system version:

uname -r
cat /proc/version
cat /etc/os-release
lsb_release -a
Note: lsb_release command sometimes does not work on CentOS

[[email protected] ~]# cat /etc/os-release 
NAME="CentOS Linux"
VERSION="7 (Core)"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="7"
PRETTY_NAME="CentOS Linux 7 (Core)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:7"
HOME_URL="https://www.centos.org/"
BUG_REPORT_URL="https://bugs.centos.org/"

CENTOS_MANTISBT_PROJECT="CentOS-7"
CENTOS_MANTISBT_PROJECT_VERSION="7"
REDHAT_SUPPORT_PRODUCT="centos"
REDHAT_SUPPORT_PRODUCT_VERSION="7"

[[email protected] ~]# cat /proc/version 
Linux version 3.10.0-1062.12.1.el7.x86_64 ([email protected]) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-39) (GCC) ) #1 SMP Tue Feb 4 23:02:59 UTC 2020
[[email protected] ~]# 

All commands :
[[email protected] ~]# rpm -Uvh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
Retrieving https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
Preparing...                          ################################# [100%]
        package epel-release-7-12.noarch is already installed
[[email protected] ~]# yum update && yum -y install xrdp tigervnc-server

[[email protected] ~]# systemctl enable xrdp && systemctl restart xrdp
Created symlink from /etc/systemd/system/multi-user.target.wants/xrdp.service to /usr/lib/systemd/system/xrdp.service.
[[email protected] ~]# 

[[email protected] ~]# adduser netsec
[[email protected] ~]# passwd netsec
Changing password for user netsec.
New password: 
Retype new password: 
passwd: all authentication tokens updated successfully.
[[email protected] ~]# usermod –aG wheel netsec 
[[email protected] ~]# netstat -an | grep 3389
tcp        0      0 0.0.0.0:3389            0.0.0.0:*               LISTEN     
[[email protected] ~]# 
Note: you don't have to add user netsec into wheel group to log into remote CentOS server through xRDP. It is just put here to show the command.


There are lots of people online having a issue to log into CentOS using xRDP. It seems authenticated but RDP session closed right away after you logged into CentOS with right username and password on Windows machine. That is because they are missing "GNOME Desktop"

# yum groups -y install "GNOME Desktop"

or using light weight desktop Xfce:
# yum groups -y install "Xfce"
Under logging user's terminal:
nano ~/.Xclients
Then copy & paste:

#!/bin/bash
XFCE="$(which xfce4-session 2>/dev/null)"
exec "$XFCE"
Make it executable:
chmod +x .Xclients
And restart the xrdp server:
sudo service xrdp restart
I still have no idea how to make it default to all users.



YouTube Video:






2. Ubuntu 18


Commands: sudo apt-get update sudo apt-get upgrade sudo apt-get install ubuntu-gnome-desktop sudo apt-get install -y xrdp sudo sed -i 's/allowed_users=console/allowed_users=anybody/' /etc/X11/Xwrapper.config sudo nano /etc/polkit-1/localauthority.conf.d/02-allow-colord.conf
# sudo nano /etc/polkit-1/localauthority.conf.d/02-allow-colord.conf

polkit.addRule(function(action, subject) {
if ((action.id == “org.freedesktop.color-manager.create-device” || action.id == “org.freedesktop.color-manager.create-profile” || action.id == “org.freedesktop.color-manager.delete-device” || action.id == “org.freedesktop.color-manager.delete-profile” || action.id == “org.freedesktop.color-manager.modify-device” || action.id == “org.freedesktop.color-manager.modify-profile”) && subject.isInGroup(“{group}”))
{
return polkit.Result.YES;
}
});
sudo apt-get install gnome-tweak-tool -y



YouTube Video for Installing GNOME Desktop GUI and xRDP on Azure Ubuntu 18.04:


Check your server's public IP through command line:
[[email protected] ~]# curl ifconfig.me
35.226.94.252




References










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