'''Note: This The [[WebVNC]] application sets up a web page to access a Java applet for VNC connections. VNC is graphical remote control desktop software. VNC allows anyone with network access to this machine you to connect to your session, if they know a desktop on the the passwordAmahi server from a remote computer via a browser. Be sure this is what you wantYou must have a desktop session open on your HDA to be able to open a WebVNC session.'''

== Install To establish remote desktop connectivity on a Fedora-based Amahi install, two elements are required: #installation of the Package ==WebVNC application on the Amahi server and #installation of a VNC client on the remote computer.

For now, the steps are just documented. But when the web app installer is complete, this will be much simpler <div style="border: 1px solid #B66; padding:)* Create an alias using the webapps setup tab. Call it "webvnc". It will create a folder5em 1em; color: /var/hda/webapps/webvnc* Log into the machine as root, change directory to /var/hda/webapps* Download package#000; background-color: wget http#FEE; margin://spatialguru.com/files/amahi/webvnc_v1.tgz3px 3px 1em 3px;">* Extract package'''Note: tar -xzf webvnc The procedure below allows anyone in your network to access a desktop on your Amahi server if they know the password.tgz - Be sure this should create files in /var/hda/webapps/webvnc/html/..is what you want.'''* Set user permissions so that Amahi can clean up later if needed: chown -R apache.apache /var/hda/webapps</webvncdiv>

That should == Install the WebVNC Package == # Go to http://setup# Select the Apps tab# Select the Available option# Click on WebVNC# Click the install icon to install the WebVNC server package on your HDA '''NOTE:''' ''You must have a desktop session open'' on your HDA to be all able to open a WebVNC session. If you have a headless HDA server, see below. ==Setup VNC Server== 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 /><br />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="0:''yourusername''" VNCSERVERARGS[0]="-geometry 1024x768 -depth 16"'''NOTE:''' ''yourusername'' is the desktop user you need 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 /><br />You can set the desktop resolution to do 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 web application setup!file permissions back:<br /> chmod 244 /etc/sysconfig/vncservers

* <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 running HDA, e.g. as a normal user* # Select SYSTEM menu, then Internet, then System > Preferences > Remote Desktop* # Turn on the top two "sharing" options, turn off the "Ask for confirmation" option, but set a password below it, turn on "Configure Network automatically to accept connections."

::[[File:Remote_Desktop_Preferences.PNG]] '''NoteNOTE: ''' 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.'''

Screenshot '''Reminder:''' You must have a desktop session started on your HDA for WebVNC to display. * Leave any questions or discussion on the [[Talk:WebVNC]] page. == Quickly Change Resolution ==You can create a script to quickly change the resolution of your HDA's desktop and update your WebVNC window. This technique involves keeping several different configuration files for your WebVNC and adjusting a symlink to reference the correct configuration. First, as root, make a copy of your WebVNC webpage configuration in your user folder for EACH desired resolution, with the following commands:  cd /var/hda/web-apps/webvnc/html cp index.html /home/%USER%/.amahi.webvnc.800x600.index.html cp index.html /home/%USER%/.amahi.webvnc.1024x768.index.html cp index.html /home/%USER%/.amahi.webvnc.1280x1024.index.html 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 window should have 22px added to the height of the desktop sharing setup below in order to account 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://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"&gt; &lt;html xmlns="http://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- sorry it's so hugealign:center;"&gt; &lt;div style="position:relative;margin: 0 auto;width:800px;height:622px;"&gt; &lt;applet code=VncViewer.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 href="http://hda/"&gt;Return to HDA Home&lt;/a&gt; &lt;/body&gt; &lt;/html&gt;

httpNext, remove the original index.html file and create a symlink to the appropriate new file: rm index.html ln -s /home/%USER%/content.screencastamahi.comwebvnc.800x600.index.html index.html Now you need a script in order to change the resolution of the desktop AND update the symlink to the correct configuration. Create a file in /usershome/spatialguru%USER%/foldersScripts/Jingfor each desired resolution, for example, amahi.webvnc.reschange.800x600.sh containing the following, making sure to enter your sudo password and the desired resolution:  #!/mediabin/996c7c1dbash echo ::password:: | sudo -05a9S rm -4a92f /var/hda/web-9d87apps/webvnc/html/index.html sudo ln -s /home/%USER%/.amahi.webvnc.800x600.index.html /var/hda/web-f89167742a3capps/00000032webvnc/html/index.html sudo xrandr -s 800x600 Finally, 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.png

Two typical scenarios pop up as problematic*A very basic issue: '''you must have a desktop session open''' on your HDA to be able to open a WebVNC session. One, is to make  * 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 == Headless Servers == If your HDA server is headless, then WebVNC is not for you (because you will not have a desktop session running). Instead, install a VNC client on your remote computer and [[VNC|VNC Server]] on the HDA.  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="quiet splash nomodeset" Reboot

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