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Simply install the following package and RAW file previews start showing up. You don't even need to logout.

yum install raw-thumbnailer

In older versions of Fedora (14 or less) you could save your current iptables with the following command:

service iptables save

This would take the tables you currently have in places and save them to the following file:

/etc/sysconfig/iptables

So you could added/delete/change any tables you want then save them so they would be correctly re-applied on the next boot.

From Linux do the following to see if the current machine can support a 64-bit kernel or not:

grep flags /proc/cpuinfo | grep lm

If you see a flag called "lm" then it can support a 64-Bit Linux install.

You basically need to change settings as the "gdm" user to change setting at the GDM login.

Do the following first:

su -
xhost +

Then you can use sudo to run programs as the gdm user. To change the background do the following:

sudo -u gdm gnome-control-center

Then click Background. There you can go select a background.

If you have gnome-tweak-tool installed another change I like to do is to show the date along with the clock at the top of the screen you can do this with the following:

First download the Sun/Oracle JRE from their web site in RPM format. The JRE in Fedora does not work. You have to get the one from Sun.

Install it:

yum install ./jre-7u55-linux-x64.rpm

Create a directory for it:

mkdir -p /opt/minecraft/client/

Download the software from here:

cd /opt/minecraft/client/
wget https://s3.amazonaws.com/MinecraftDownload/launcher/minecraft.jar

Download the icon:

Here are two ways to get a changelog history of a given Fedora package. The results of both commands are usually similar but not always.
First install the package needed.

yum install yum-utils

The below example will show the changelog of the darktable package.

repoquery --changelog darktable

rpm -q --changelog darktable

The method below can be used to convert any accent characters to "?" in a text file. This method can be used to strip accent characters from a subtitle file. The purpose for this is some muxing programs such as dvdauthor will error out when finding these characters.

The method below just converts them to "?". But you can write the results out to a different file then diff against the original to figure out where the characters are then manually convert them if you like.

I first tried to use the OpenJDK project but could not get it to work.

I ended up having to download an RPM of the official JRE from sun.

http://java.com/en/download/

I then installed it (replace the file name below with the name of the file you downloaded).

yum install ./jre-6u30-linux-i586.rpm

Then created the following directory if it does not already exist.

mkdir -p ~/.mozilla/plugins/

Next setup a symlink. The following will work for the 32-bit version.

First install ndiswrapper

yum install ndiswrapper kmod-ndiswrapper

If that also upgraded kernels you will have to reboot at this point to use the new kernel that matches the version of the ndiswrapper kenrel module installed.

Now download the driver files needed from the link below.

http://www.kevinfowler.net/Netgear-WNA3100.tar.gz

Untar it then install the driver with ndiswrapper.

tar zxvf Netgear-WNA3100.tar.gz
cd Netgear
ndiswrapper -i bcmwlhigh5.inf

Now load the kernel module.

*** UPDATE: This is now not needed in Fedora 16. They finally added a program for turning it on the old way. Just go to Internet then click on "Desktop Sharing". ***

This is the equivalent of turning on the "Remote Desktop" support in Fedora 14 and below. This feature is one of the many missing from Gnome 3.x. The following method will allow it to work again in Fedora 15/16.

Install x11vnc package.

yum install x11vnc

Run the following as the user who's session you want to VNC to. When prompted enter the password you want to use to connect with.