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{{MessageBox|backgroundcolor =#FBB|image = Using 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 1221/23) guidance.__TOC__ =VNC remote =
Using [http://realvnc.com/ VNC] is useful if:
* 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
* A server
* A client
Download the client software and install:
* 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 = Server Installation = There 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). === Manual Install ===* Complete the steps in [[GUI_Install_for_Express_Disc|Express Disc Desktop]] guidance (Amahi 7 ONLY). * As root, install the server: yum -y install tigervnc-server == 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 terminal open, or open one now. *The following commands are entered as '''User'''. * 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. * 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 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, 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. *The following commands are entered as '''Root'''. * Type su and press the enter key followed by the root password You can edit the configuration files using your choice of editor. Nano is used below.Note that when "username" is shown, you need to enter your user name. * Type nano /etc/sysconfig/vncservers 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 change 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, showing you the file name. Press the enter key, this will store your change and exit Nano. * Finally, type chkconfig vncserver on and press the enter key. This will make the VNC server start when the computer starts. * Press ctrl-D to end the root session, and then press ctrl-D again to close the terminal. * 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" * Repeat the 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.
== Server: Installation - Method 1 2 ==
* To start the server in your HDA, you need install tigervnc-server rpm package:
* From the '''root''' user:
* Create /etc/gdm/custom.conf file and add the following:
* Create /etc/xinetd.d/vnc1024 file and add the following (you can change the screen resolution by changing the geometry setting):
* Edit /etc/services and comment out the two lines as listed below:
* Add this line below the two lines you commented out and save the changes:
* Now restart the xinetd service
* 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:
== Server: Installation - Method 2 3 (the cpg method) == * To start Every time the server in your HDAis rebooted, when VNC is needed, you need install tigervnc-server rpm package:ssh to the HDA* From the '''root''' userThe first time without do: yum vncserver -y install tigervnc-server chkconfig vncserver on service vncserver startgeometry 1550x1100* Edit After the first time, I type vncs. I have an alias in ~/etc/sysconfig/vncservers and change lines as follows (username is your linux user for the VNC session).bashrc: VNCSERVERS alias vncs="2:username" VNCSERVERARGS[2]="'vncserver -geometry 1024x768 -nolisten tcp -localhost"* Edit 1550x1100 &> /homedev/username/.vnc/xstartup and make the end of the file look as follows: # twm null &'; startx &* Stop and start vncserver: service vncserver stop service vncserver start* Start VNC on reboot (do this as your linux user for the VNC session): crontab -e @reboot vncserver* Run your VNC Client and enter hdaNotes:1 as the host/IP address. You should now see your HDA Desktop screen.
* Why that resolution? That fits my monitors with the VNC window and frame enough to not display scrollbars and move around nicely. Change at will!
* It does involve the dreaded CLI.
* Since my HDA does not get rebooted often, this is not a huge problem
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]
