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VNC (view source)

Revision as of 01:11, 8 May 2016

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{{MessageBox|backgroundcolor = Using #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}}  ----  <div style="border: 1px solid #A3B1BF; padding: .8em 1em; background-color: #E6F2FF; margin: 0px 1em;">'''NOTE:''' The one-click [https://www.amahi.org/apps/vnc VNC to use App] has been discontinued for Amahi 7 or greater. The reason is that it pulls a remote lot of packages, including desktop and that breaks DNS in the HDA Fedora.</div><br /> :'''NOTE:''' See [[TigerVNC]] for Amahi 8/9 (Fedora 21/23) guidance.__TOC__ = VNC remote =
Using [http://realvnc.com/ VNC] is useful if:
* You would like a Linux desktop to the HDAremotely* 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)* You enjoy using or have a scanner or other device that requires a desktop program to configure and the Linux desktopmachine is headless
= What you need =
* A client
= Client : Installation = * [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 Remember when you start the server will tell you which session it is running (like :1, :2 ...), so your settin like this:
hdaDownload the client software and install:1
= Server = * 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
To start the server in your HDA, you need the vnc-server rpm package:= Server Installation =
<pre>yum -y install vnc-There are various ways to get the server going in your HDA. All of them require the serversoftware.<# Amahi [http://www.amahi.org/pre>apps/VNC VNC] application.# Manually as described below (notes may require some revision).
When that is installed, type this at === Manual Install ===* Complete the command linesteps in [[GUI_Install_for_Express_Disc|Express Disc Desktop]] guidance (Amahi 7 ONLY).
vncserver* As root, install the server:
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: yum -y install tigervnc-server
vncserver == Method 1 ==* Open a terminal, become root and install the VNC server (tigervnc-geometry 1250x1000server) as stated in the Manual Install section. When the install has completed, press ctrl-D to end the root session. Leave the terminal open, or open one now.
To make the VNC server start automatically after a reboot use this command *The following commands are entered as root:'''User'''.
chkconfig vncserver on* Type vncpasswd and press enter. The system will prompt you for a password. Type a password and press the enter key. The system will prompt you to verify the password. Type the password a second time and press the enter key.
<big>* 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)''More detailed instructions are available [httpdesktop is host.localdomain:1 Creating default startup script /home/user/www.g-loadedvnc/xstartup Starting applications specified in /home/user/.euxauthority Log file is /2005home/11user/10/configure-.vnc-server-in-fedora/ here]host.localdomain:1.'''</big>log
= Running * You can edit the Full 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 press 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 =desktop, even if the 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.
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 '''Root'''.
First kill * Type su and press the VNC session: vncserver -kill :1enter key followed by the root password
You can edit the configuration files using your choice of editor.vncNano is used below.Note that when "username" is shown, you need to enter your user name. * Type nano /etc/sysconfig/xstartupvncservers and press the enter key. Nano will open the file. Find the following lines: '#' VNCSERVERS="1:username" '#' 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]="-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 make sure it has these two lines uncommentedchange this if necessary. 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, per showing you the comment there:file name. Press the enter key, this will store your change and exit Nano.
<pre># Uncomment * Finally, type chkconfig vncserver on and press the following two lines for normal desktop:unset SESSION_MANAGERexec /etc/X11/xinit/xinitrc</pre>enter key. This will make the VNC server start when the computer starts.
Now restart * Press ctrl-D to end the vncserver: vncserverroot session, and then press ctrl-D again to close the terminal.
I use remote desktop viewer, hit the connect button * That's it - Run your VNC Client and type enter hda:1<br>That as the host/IP address. You should be itnow see your HDA Desktop screen.*If you are interested in more security for your VNC connection, check the link listed below under "General Instructions"
= Killing * Repeat the Server =configuration for each user you wish to be able to connect via VNC.* Note you can have displays for users 1-9 and each will connect to their VNC session at port 590n (some VNC clients 'know' the 590 part and only have you enter n). Make certain that you have forwarded the correct port(s), or the range 5901 through 5909.* Add -localhost to options if you are connecting through a ssh tunnel or only locally. This adds some security.
== Method 2 ==* To kill start the server in session your HDA, you need install tigervnc-server rpm package:* From the '''root''' user: yum -y install xinetd chkconfig vncserver off service vncserver stop* Create /etc/gdm/custom.conf file and add the following:1 #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, you a reboot of the HDA may be required. This can dobe done via the dashboard or by executing the following as '''root''' user: reboot now
vncserver -kill :1== Method 3 (the cpg method) ==
* Every time the HDA is rebooted, when VNC is needed, ssh to the HDA* The first time without do: vncserver -geometry 1550x1100* After the first time, I type vncs. I have an alias in ~/.bashrc: alias vncs= Setup TimedLogin'vncserver -geometry 1550x1100 &> /dev/null &';
TimedLogin is useful if you want to run a headless HDA and enjoy the benefits that VNC provides without having to login from the command line via SSH and manually starting X.Notes:
Add * Why that resolution? That fits my monitors with the following VNC window and frame enough to not display scrollbars and move around nicely. Change at will!* It does involve the file /etc/gdm/customdreaded CLI.conf* Since my HDA does not get rebooted often, this is not a huge problem
<pre>[daemon]TimedLoginEnable=trueTimedLoginGeneral Instructions =<username><More detailed instructions are available [http:/pre>/www.g-loaded.eu/2005/11/10/configure-vnc-server-in-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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