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Revision as of 01:11, 8 May 2016

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{{MessageBox|backgroundcolor = Using VNC to use a remote desktop in the #FBB|image =Warning.png|heading =WARNING|message = '''NOTE:''' This is for Fedora-based systems ONLY.<br />Guidance may not work for Amahi 7 or greater. Sorry, but if you break your HDA =we cannot provide support}}{{NeedsUpdate}}
Using [http://realvnc.com/ VNC] is useful if:
* You would like a Linux desktop to the HDA* You would like to use a GUI to configure printer(s)* You enjoy using the Linux desktop----
= What you need =
* A server<div style="border: 1px solid #A3B1BF; padding: .8em 1em; background-color: #E6F2FF; margin: 0px 1em;">* A client'''NOTE:''' The one-click [https://www.amahi.org/apps/vnc VNC App] has been discontinued for Amahi 7 or greater. The reason is that it pulls a lot of packages, including desktop and that breaks DNS in Fedora.</div><br />
= Client =:'''NOTE:''' See [[TigerVNC]] for Amahi 8/9 (Fedora 21/23) guidance.__TOC__
* [http://realvnc.com/ For Windows]* [http://cotvnc.sourceforge.net/ For MAC]* For Linux, you have the vncviewer package, available in most, if not all distros= VNC remote =
Remember when you start the server will tell you which session it is running (like Using [http:1, :2 //realvnc...), so your settin like thiscom/ VNC] is useful if:
hda:1* You would like a Linux desktop to the HDA remotely* You run your HDA headless (no monitor) and like to still use a desktop in it* You would like to use a GUI to configure printer(s) or have a scanner or other device that requires a desktop program to configure and the machine is headless
= Server What you need =
To start the * A server in your HDA, you need the vnc-server rpm package:* A client
<pre>yum -y install vnc-server</pre>= Client: Installation =
When that is installed, type this at Download the command lineclient software and install:
vncserver* Windows: [http://realvnc.com RealVNC], [http://www.uvnc.com UltraVNC], [http://www.tightvnc.com TightVNC]* MAC: [http://sourceforge.net/projects/chicken/ Chicken], [http://cotvnc.sourceforge.net/ Chicken of the VNC] (do not use internal vnc client as there are some issues)* For Linux, you have the vncviewer package, available in most, if not all distros. For Fedora 12, do the following as [[Open_Terminal_as_root|'''root''']] user: yum -y install tigervnc
The first time it runs it will ask for setting up a password. You can also specify a size, which I typically do a hair smaller than the desktop I plan to use it from. Example for 1280x1024:= Server Installation =
vncserver -geometry 1250x1000There are various ways to get the server going in your HDA. All of them require the server software.# Amahi [http://www.amahi.org/apps/VNC VNC] application.# Manually as described below (notes may require some revision).
To make === Manual Install ===* Complete the VNC server start automatically after a reboot use this command as root:steps in [[GUI_Install_for_Express_Disc|Express Disc Desktop]] guidance (Amahi 7 ONLY).
chkconfig vncserver on* As root, install the server:
<big>'''More detailed instructions are available [http://www.g yum -loaded.eu/2005/11/10/configure-vncy install tigervnc-server-in-fedora/ here].'''</big>
= Running = Method 1 ==* Open a terminal, become root and install the VNC server (tigervnc-server) as stated in the Manual Install section. When the install has completed, press ctrl-D to end the root session. Leave the Full Gnome Desktop =terminal open, or open one now.
In order to run the full gnome desktop in vnc, you have to edit this file in the home directory of the user you want to run vnc on:*The following commands are entered as '''User'''.
First kill * Type vncpasswd and press enter. The system will prompt you for a password. Type a password and press the VNC session: vncserver -kill :1enter key. The system will prompt you to verify the password. Type the password a second time and press the enter key.
* Type vncserver and press the enter key. The system will create the configuration files. You should see output similar to this: xauth: creating new authority file /home/user/.xauthority New 'host.localdomain:1 (user)' desktop is host.localdomain:1 Creating default startup script /home/user/.vnc/xstartup Starting applications specified in /home/user/.xauthority Log file is /home/user/.vnc/host.localdomain:1.log
* You can edit the configuration files using your choice of editor. Nano is used below. Note that when "user" is shown, you need to enter your user name. * Type nano /home/user/.vnc/xstartup and make sure it has these two lines uncommentedpress the enter key. Nano will open the file. Find the following line: twm & Change that line to read: exec gnome-session & This change will open the VNC display with a Gnome desktop, per even if the comment there:server is starting in Init 3 by default. Press ctrl-X to exit Nano. You will see the prompt at the bottom "Save modified buffer (ANSWERING "No" WILL DESTROY CHANGES) ? Press the Y key. The prompt will change, showing you the file name. Press the enter key, this will store your change and exit Nano.
<pre># Uncomment the *The following two lines for normal desktop:unset SESSION_MANAGERexec /etc/X11/xinit/xinitrc</pre>commands are entered as '''Root'''.
Now restart * Type su and press the vncserver: vncserverenter key followed by the root password
I use remote desktop viewerYou can edit the configuration files using your choice of editor. Nano is used below.Note that when "username" is shown, hit you need to enter your user name. * Type nano /etc/sysconfig/vncservers and press the enter key. Nano will open the connect button and type hdafile. Find the following lines: '#' VNCSERVERS="1<br>:username"That should be it. '#' VNCSERVERARGS[1]="-geometry 800x600 -nolisten tcp -localhost"
* Uncomment both lines by removing the # at the beginning of the lines. Edit the lines so they appear as follows: VNCSERVERS="1:username" VNCSERVERARGS[1]= Killing "-geometry 1024x768 -nolisten tcp" Enter your username in place of "username". After "geometry", you can enter any resolution you desire. You can come back and change this if necessary. Press ctrl-X to exit Nano. You will see the prompt at the Server =bottom "Save modified buffer (ANSWERING "No" WILL DESTROY CHANGES) ? Press the Y key. The prompt will change, showing you the file name. Press the enter key, this will store your change and exit Nano.
To kill * Finally, type chkconfig vncserver on and press the enter key. This will make the VNC server in session :1, you can do:start when the computer starts.
vncserver * Press ctrl-kill :1D to end the root session, and then press ctrl-D again to close the terminal.
= Setup Automatic Login =* That's it - Run your VNC Client and enter hda:1 as the host/IP address. You should now see your HDA Desktop screen.*If you are interested in more security for your VNC connection, check the link listed below under "General Instructions"
Automatic login is useful if * Repeat the configuration for each user you want wish to be able to run a headless HDA connect via VNC.* Note you can have displays for users 1-9 and enjoy each will connect to their VNC session at port 590n (some VNC clients 'know' the benefits 590 part and only have you enter n). Make certain that VNC provides without having you have forwarded the correct port(s), or the range 5901 through 5909.* Add -localhost to login from the command line via SSH and manually start Xoptions if you are connecting through a ssh tunnel or only locally. This adds some security.
Add == Method 2 ==* To start the following to server in your HDA, you need install tigervnc-server rpm package:* From the file '''root''' user: yum -y install xinetd chkconfig vncserver off service vncserver stop* Create /etc/gdm/custom.conffile and add the following: #GDM configuration storage [xdmcp] Enable=true [chooser] [security] DisallowTCP=false [debug]* Create /etc/xinetd.d/vnc1024 file and add the following (you can change the screen resolution by changing the geometry setting): service vnc1024 { disable = no socket_type = stream protocol = tcp group = tty wait = no user = nobody server = /usr/bin/Xvnc server_args = -inetd -query localhost -geometry 1024×768 -depth 16 -once -fp /usr/share/X11/fonts/misc -securitytypes=none }* Edit /etc/services and comment out the two lines as listed below: #vnc-server 5900/tcp # VNC Server #vnc-server 5900/udp # VNC Server* Add this line below the two lines you commented out and save the changes: vnc1024 5900/tcp # VNC and GDM* Now restart the xinetd service service xinetd restart* Run your VNC Client and enter your HDA IP address for host/IP address. You should now see your HDA Desktop login screen. If you don't see the login screen, a reboot of the HDA may be required. This can be done via the dashboard or by executing the following as '''root''' user: reboot now
<pre>#Enable Auto login to the GNOME desktop[daemon]AutomaticLoginEnable=trueAutomaticLogin=<username>TimedLoginEnable=trueTimedLoginMethod 3 (the cpg method) =<username>TimedLoginDelay=0</pre>
Replace <username> with * Every time the username that you want to automatically login HDA is rebooted, when VNC is needed, ssh to the GNOME desktopHDA* The first time without do: vncserver -geometry 1550x1100* After the first time, I type vncs.I have an alias in ~/.bashrc: alias vncs='vncserver -geometry 1550x1100 &> /dev/null &';
If you want to have a script help you to accomplish the task, download [httpNotes://wiki.amahi.org/images/a/a3/AutomaticLogin.rb AutomaticLogin.rb] and run the script as root (directions to accomplish this are below).
Login as root then run * Why that resolution? That fits my monitors with the following commands:<pre>cd /tmpwget http://wiki.amahiVNC window and frame enough to not display scrollbars and move around nicely.org/images/a/a3/AutomaticLogin.rbChange at will!chmod +x AutomaticLogin* It does involve the dreaded CLI.rb./AutomaticLogin.rb</pre>* Since my HDA does not get rebooted often, this is not a huge problem
Then follow the prompts to guide you = General Instructions =More detailed instructions are available [http://www.g-loaded.eu/2005/11/10/configure-vnc-server-in the setup-fedora/ here].
= Troubleshooting for Vista =
This helpful page has helped with [http://www.windowsreference.com/internet-explorer/windows-has-blocked-this-software-because-it-cant-verify-the-publisher/ blocking VNC]
Bigfoot65
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