BullDog Notes

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== What ==
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== What - Remote Access to Ubunto 18.04 ==
  
 
How do you work with a headless Ubuntu 18.04 system?  I would like to make this easy so for me a remote desktop just like the local real
 
How do you work with a headless Ubuntu 18.04 system?  I would like to make this easy so for me a remote desktop just like the local real
 
desktop would be great.  I think I have now, it but it has been hard to get there.  I would like to maintain as much security as possible.
 
desktop would be great.  I think I have now, it but it has been hard to get there.  I would like to maintain as much security as possible.
The access to the Ubuntu machine will be from Windows 10.  For me this is all inside my local network.  There seem to be 3 useful ways to do this:
+
The access to the Ubuntu machine will be from Windows 10.  For me this is all inside my local network.  I have found 3 useful ways to do this on my system:
  
 
* Get command line access ( Putty and SSH )
 
* Get command line access ( Putty and SSH )
 
* Webmin, remote http web access.
 
* Webmin, remote http web access.
 
* Full VNC desktop ( there are other remote desktops )
 
* Full VNC desktop ( there are other remote desktops )
 +
* Why not just use option Share Desktop ?  Because mine would not turn on thats why.  Why it would not turn on, I was not able to figure out.
  
Of these VNC is the most difficult, and the one I wanted, it will be discussed first.
+
Of these VNC is the most difficult, and the one I wanted, it will be discussed first.  It also mentions tools that may be useful in other approaches.
  
  
 
+
=== VNC full Desktop -- My Goal ===
 
+
 
+
=== VNC full Desktop Goal ===
+
  
 
I would like to use VNC to access a Ubuntu 18.04 system from windows like I do with the Raspberry Pi.   
 
I would like to use VNC to access a Ubuntu 18.04 system from windows like I do with the Raspberry Pi.   
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* Connect to the existing desktop
 
* Connect to the existing desktop
 
* Keep the connection secure
 
* Keep the connection secure
 +
* Stick to open source.
  
 
This has been a bit of a struggle for a number of gotchas.
 
This has been a bit of a struggle for a number of gotchas.
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* To get VNC working there seem to be various components.
 
* To get VNC working there seem to be various components.
 
** VNC server
 
** VNC server
** Desktop software ( there are many different ones, you may need to install -- however here I want to run on the default Ubuntu 18.04 desktop so no install is necessary )
+
** Desktop software ( there are many different ones, you may need to install -- however here I want to run on the default Ubuntu 18.04 desktop so, of course, it is already installed. )
 
** A way to connect to the VNC server -- many servers will only connect to localhost 127.0.0.1 so we will use vnc tunnelling to make a remote connection appear to be on localhost
 
** A way to connect to the VNC server -- many servers will only connect to localhost 127.0.0.1 so we will use vnc tunnelling to make a remote connection appear to be on localhost
  

Revision as of 09:39, 1 June 2019

Contents

What - Remote Access to Ubunto 18.04

How do you work with a headless Ubuntu 18.04 system? I would like to make this easy so for me a remote desktop just like the local real desktop would be great. I think I have now, it but it has been hard to get there. I would like to maintain as much security as possible. The access to the Ubuntu machine will be from Windows 10. For me this is all inside my local network. I have found 3 useful ways to do this on my system:

  • Get command line access ( Putty and SSH )
  • Webmin, remote http web access.
  • Full VNC desktop ( there are other remote desktops )
  • Why not just use option Share Desktop ? Because mine would not turn on thats why. Why it would not turn on, I was not able to figure out.

Of these VNC is the most difficult, and the one I wanted, it will be discussed first. It also mentions tools that may be useful in other approaches.


VNC full Desktop -- My Goal

I would like to use VNC to access a Ubuntu 18.04 system from windows like I do with the Raspberry Pi.

  • Connect to the existing desktop
  • Keep the connection secure
  • Stick to open source.

This has been a bit of a struggle for a number of gotchas.

Overview

As I understand it ( may not have figured it out all the way )

  • VNC has a server ( run on the machine you wish to view ) and viewer ( run on the machine you wish to access).
  • In addition to having several components there are many versions of VNC. Directions for each differ, and differ across versions of Linux. Make sure you directions match your software.
  • I will focus on Tiger VNC and Ubuntu 18.04
  • To get VNC working there seem to be various components.
    • VNC server
    • Desktop software ( there are many different ones, you may need to install -- however here I want to run on the default Ubuntu 18.04 desktop so, of course, it is already installed. )
    • A way to connect to the VNC server -- many servers will only connect to localhost 127.0.0.1 so we will use vnc tunnelling to make a remote connection appear to be on localhost


Software Used

before installs

  • sudo apt update
  • sudo apt upgrade


Process viewer (htop)

  • Why This will let you see what vnc software is running.
  • Install >> sudo apt -install htop
  • Run >> htop
  • Exit >> ctrl-c

IfConfig

  • Why see your server's tcp ip address
  • Install >> sudo apt -install ??
  • Run >> ifconfig
  • Exit >> just ends

SSH

  • Install >> sudo apt install openssh-server

what

might this help gconf-editor

System Control

systemctl vs. service

  • sudo systemctl stop httpd << The Apache server would stop and you'd be returned to the bash prompt. To start the same service, we'd issue the command:
  • sudo systemctl start httpd << The service would start and you'd be returned to your bash prompt.


  • sudo systemctl restart httpd << to restart the same service

Ubuntu text editor ( gedit )

  • Install >> apt-get -install  ??
  • Run >> htop

Ubuntu File Browser

Tiger VNC

  • Note: there may already be vncserver software installed perhaps vineo ??
  • Install >> sudo apt-get install tigervnc-scraping-server
  • Install ( may not be needed ) >> sudo apt install tigervnc-standalone-server tigervnc-viewer
  • Set password >>vncpasswd << gotcha, if run server with no password set. If this does not run find an install -- perhaps full tiger vnc to get it.
  • Run gotcha >> x0tigervncserver << but gotcha, needs to be pointed to password file so
  • Run >> x0tigervncserver -PasswordFile ~/.vnc/passwd
  • Run gotcha this is not the scraping server may not be installed >> tigervncserver -xstartup /usr/bin/xterm
  • Set password >>vncpasswd << gotcha, if run server with no password set it will not work.
  • edit configuration file >> use file browser but .vnc is hidden so turn on hidden file abillity ( one of its menus )
    • sudo apt-get install git psmisc
  • set password with >> vncpasswd
  • see running servers >> vncserver -list
  • what runs with command vncserver >> which vncserver
    right answer is ?? 

/usr/bin/vncserver


PuTTY X11 proxy: Unsupported authorisation protocol

How to start a vnc server for the actual display (scraping) with TigerVNC https://www.howtoforge.com/tutorial/how-to-start-a-vnc-server-for-the-actual-display-scraping-with-tigervnc/

Workflow In Use

  • Boot the Ubuntu machine, if powered off just power on, if you have access sudo reboot ?? or restart will boot it.
  • Wait
  • On the windows machine connect with Putty and log in with your password and id
  • In Putty issue the command to start the VNC Server >> ./startvnc start
  • Start the windows VNC viewer the one I used is VNC viewer from RealVNC ... because this is the one I use for the Rasberry Pi ( you need to have a configuration with the right ip address of the Ubuntu Machine the same as the one in Putty

Easiest, no Desktop Putty SSH

  • Install ssh on Ubuntu
  • Run Putty on windows using the IP address of the Ubuntu machine


Webmin Somewhat Graphical, Easier than Command Line

  • rather than use the desktop use a web based admin tool:


  • Install >> sudo apt-get install webmin << seems to work on virtual machine but not real one ??
  • Start >> sudo /etc/webmin/start

How To Install Webmin on Ubuntu 18.04 | DigitalOcean https://www.digitalocean.com/community/tutorials/how-to-install-webmin-on-ubuntu-18-04 sudo nano /etc/apt/sources.list sudo gedit /etc/apt/sources.list

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