Trusted, Bureaucrats, Administrators
12,424
edits
Changes
From Amahi Wiki
no edit summary
{{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.
<div style="border: 1px solid #B66; padding: .5em 1em; color: #000; background-color: #FEE; margin: 3px 3px 1em 3px;">
'''Note: The procedure below allows anyone in your network to access this machine to connect to a desktop on your session, Amahi server if they know the password. Be sure this is what you want.'''
</div>
== Install the WebVNC Package ==
'''NOTE:''' a very common issue is that ''you 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.
==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="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 /><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 ==
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>
::[[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.
'''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 in order to account for the WebVNC menu. For example, for the resolution 800x600, the html file will look like this: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">> <head> <title>WebVNC Client</title> <meta http-equiv="Content-Language" content="en-us" /> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8" /> <head> <body style="font-size:8px;background-color:#000000;font-family:arial, helvetica, sans-serif;font-color:#007500;text-align:center;"> <div style="position:relative;margin: 0 auto;width:800px;height:622px;"> <applet code=VncViewer.class codebase=classes/ width="800" height="622"> <param name=PORT value=5900> <param name="Open New Window" value="no"> </applet><br /> </div> <a href="http://hda/">Return to HDA Home</a> </body> </html>
== Troubleshooting ==
* 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:# Make sure you have a password defined as above. # 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.
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 mv ~nano /.gnome2boot/keyringsgrub/defaultgrub.keyring ~conf:save it as grub.conf.bak nano /.gnome2boot/keyringsgrub/default.keyringgrub.bakconf:add above title Fedora GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset"
If your HDA server is headless, then WebVNC is not for you (because you will not have ever want to use a desktop session running). Insteadmonitor, install a VNC client on your remote computer and [[VNC|VNC Server]] on you just need to restore the HDA. bak files.
[[Category:Apps]]
