{{NeedsUpdate}} The [[WebVNC]] package is for easily setting application sets up a web-page that let's readers to access a Java applet for VNC connections. VNC is, simply put, graphical remote control desktop software. With VNC allows you to connect to a desktop on the the Amahi server from a remote computer via a browser. You must have a desktop session open on your HDA to be able to open a WebVNC session. To establish remote desktop connectivity on a Fedora-based Amahi install, it takes a few steps two elements are required: #installation of the WebVNC application on the Amahi server to 1) install and #installation of a VNC client on the package, 2) turn on desktop sharingremote computer.

'''Note: This The procedure below allows anyone with in your network to access to this machine to connect to a desktop on your session, Amahi server if they know the password. Be sure this is what you want.'''

== Install the WebVNC Package ==

* Goto # Go to http://setup* # Select the applications Apps tab* # Select the Available option# Click on WebVNC* # Click the install icon to install it the WebVNC server package on your HDA* Note: a very common issue is that ''you must have a desktop session open'' on your HDA to be able to open a WebVNC session. If you have a headless HDA server, see below.

That should '''NOTE:''' ''You must have a desktop session open'' on your HDA to be all able to open a WebVNC session. If you need to do for the web application setup!have a headless HDA server, see below.

Sorry, some manual work is needed to run the server:1. Log into the computer running the HDA as a normal user2. Launch a command line/terminal session (From the GNOME desktop, select Applications > System Tools > Terminal)3. Login as super user:<br /> su -:password: ''enter root password''<br /><smallbr />4. Change the permissions of /etc/sysconfig/vncservers to allow editing with the following command:<br /> chmod 777 /etc/sysconfig/vncservers5. Open the file /etc/sysconfig/vncservers with a text editor (Applications > Accessories > gedit Text Editor on the GNOME desktop) and add the following two lines to the bottom of the file:<br /> VNCSERVERS="10:''yourusername''" VNCSERVERARGS[10]="-geometry 1024x768 -depth 16" '''NOTE:''' ''yourusername'' is the desktop user you use to login to your HDA desktop. Make sure there is no # comment symbol in front of your entries. This entry will create a 1024 x 768 desktop with 16M colors on your remote machine.<br /small><br />You can set the desktop resolution to any value you want -- see below. You can also setup sessions for multiple users and computers. More detailed instructions are available [http://www.g-loaded.eu/2005/11/10/configure-vnc-server-in-fedora/ here].<br /><br />6. Change the file permissions back:<br /> chmod 244 /etc/sysconfig/vncservers == Turn on Desktop Sharing ==<div style="border: 1px solid #B66; padding: .5em 1em; color: #000; background-color: #FEE; margin: 3px 3px 1em 3px;">Unless you do this, your VNC session or your desktop will have a message asking someone to accept or refuse connections, and your client will be stuck waiting!</div># Log into your desktop on the HDA computer.# Select System > Preferences > Remote Desktop# Turn on the two "sharing" options, turn off the "Ask for confirmation" option, set a password, turn on "Configure Network automatically to accept connections." ::[[File:Remote_Desktop_Preferences.PNG]] '''NOTE:''' This allows anyone with network access to this machine to connect to your session, if they know the password. Be sure this is what you want. == Using the App ==You should now be able to access: [http://webvnc http://webvnc]. Give it a minute to start up, then enter your password.

where ''yourusername'Reminder:' is the '' You must have a desktop user you use to access session started on your HDA desktopfor WebVNC to display.

* Leave any questions or discussion on the [[VNC|Click HereTalk:WebVNC]] more details on setting up VNC on your HDApage.

== Turn on Desktop Sharing ==(this will be automated in the future)* Log into the computer running HDAFirst, e.g. as root, make a normal copy of your WebVNC webpage configuration in your user* Select SYSTEM menufolder for EACH desired resolution, then Preferences, then Internet and Network, then Remote Desktop* Turn on the top two "sharing" options, turn off with the "Ask for confirmation" option, but set a password below it.following commands:

'''Note: This allows anyone with network access to this machine to connect to your session, if they know the password cd /var/hda/web-apps/webvnc/html cp index.html /home/%USER%/.amahi.webvnc.800x600. index.html Be sure this is what you wantcp index.html /home/%USER%/.amahi.webvnc.1024x768.index.html cp index.html /home/%USER%/.amahi.webvnc.1280x1024.index.'''html

== Using You will need to edit each of these files to change the size of the VNC window inside the web page. The width of the window should match the width of your desktop, however the height of the App ==You window should now be able have 22px added to the height of the desktop in order to accessaccount for the WebVNC menu. For example, for the resolution 800x600, the html file will look like this: [ &lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://webvnc www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"&gt; &lt;html xmlns="http://webvnc]www.w3.org/1999/xhtml" xml:lang="en" lang="en"&gt;&gt; &lt;head&gt; &lt;title&gt;WebVNC Client&lt;/title&gt; &lt;meta http-equiv="Content-Language" content="en-us" /&gt; &lt;meta http-equiv="Content-Type" content="text/html;charset=UTF-8" /&gt; &lt;head&gt; &lt;body style="font-size:8px;background-color:#000000;font-family:arial, helvetica, sans-serif;font-color:#007500;text-align:center;"&gt; &lt;div style="position:relative;margin: 0 auto;width:800px;height:622px;"&gt; &lt;applet code=VncViewer. Give it class codebase=classes/ width="800" height="622"&gt; &lt;param name=PORT value=5900&gt; &lt;param name="Open New Window" value="no"&gt; &lt;/applet&gt;&lt;br /&gt; &lt;/div&gt; &lt;a minute href="http://hda/"&gt;Return to start up, then enter your password.HDA Home&lt;/a&gt; &lt;/body&gt; &lt;/html&gt;

Note: ''' You must have Next, remove the original index.html file and create a desktop session started on your HDA for WebVNC symlink to displaythe appropriate new file: rm index.''' html ln -s /home/%USER%/.amahi.webvnc.800x600.index.html index.html

Leave any questions or discussion on Now you need a script in order to change the [[Talkresolution of the desktop AND update the symlink to the correct configuration. Create a file in /home/%USER%/Scripts/ for each desired resolution, for example, amahi.webvnc.reschange.800x600.sh containing the following, making sure to enter your sudo password and the desired resolution:WebVNC]] page.

Screenshot of desktop sharing setup below #!/bin/bash echo ::password:: | sudo -S rm -f /var/hda/web-apps/webvnc/html/index.html sudo ln - sorry it's so huge/home/%USER%/.amahi.webvnc.800x600.index.html /var/hda/web-apps/webvnc/html/index.html sudo xrandr -s 800x600

http://contentFinally, make each of your scripts executable (chmod u+x %SCRIPT%), place a drawer on your panel with a launcher to each of your scripts, then to change resolutions select your launcher and refresh your WebVNC window.screencast.com/users/spatialguru/folders/Jing/media/996c7c1d-05a9-4a92-9d87-f89167742a3c/00000032.png

*A very basic issue -- : '''you must have a desktop session open''' on your HDA to be able to open a WebVNC session. * Make sure you have a password defined as above.

Two typical scenarios pop up as problematic. One, is to make sure you have a password defined as above. Second, make sure * Ensure the confirmation checkbox is deactivated, unless you are sitting in front of the HDA itself. Otherwise it will just sit there indefinitely waiting for someone to click a button on the screen of the HDA.

* Please note that at the present time, and according to the above, only port 5900 (VNC display :0) is supported. If you want to change that, then manually edit /var/hda/web-apps/webvnc/html/index.html and change 5900 to desired number (e.g. :1 = 5901, :2=5902, etc).

* If when trying to connect with WebVNC you get a message on the Amahi box "Enter password for default keyring to unlock" then you need to delete or rename the default keyring:

:To delete: ~/.gnome2/keyrings/default.keyring:or backup: mv ~/.gnome2/keyrings/default.keyring ~/.gnome2/keyrings/default.keyring.bak

There is however a hack to allow you to run WebVNC from a headless server. This is rather complex, and will not allow you to boot with a monitor attached without changing files again.  You need to modify you xorg.conf to emulation a monitor.  cd /etc/X11/ nano xorg.conf:save it as xorg.conf.bak nano xorg.conf:replace everything with  Section "Monitor" Identifier "Monitor0" HorizSync 31-81 VertRefresh 56-75 EndSection Section "Device" Identifier "Card0" Driver "vesa" EndSection Section "Screen" Identifier "Screen0" Device "Card0" Monitor "Monitor0" EndSection :save and close xorg.conf  nano /boot/grub/grub.conf:save it as grub.conf.bak nano /boot/grub/grub.conf:add above title Fedora GRUB_CMDLINE_LINUX_DEFAULT== Headless Servers =="quiet splash nomodeset"

TightVNC is If you ever want to use a more up-monitor, you just need to-date implementation of VNC. As of July 2009, TightVNC server is not yet packaged for Fedora 10, however restore the TightVNC client is compatible with (regular) VNC. You may install either the VNC or TightVNC clientbak files.