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Checking for Bad Blocks on a Hard Drive in Linux

In Fedora, the badblocks program is part of the e2fsprogs program. You probably already have that installed. But in case you don't do the following:

yum install e2fsprogs

To just see the bad blocks the following to do a non-destructive read/write test:

badblocks -nvs /dev/sda

To generate generate a list of the bad blocks do the following:

badblocks -nv /dev/sda > badblocks.txt

Now you can mark the bad blocks found with the following:

Sharing Desktop in Fedora 18

NOTE: This is an update from my previous post on sharing the desktop or running a VNC Server. This method works great in Fedora 18.

First install the vino package:

yum install vino

Then click on Activities in the top left corner of the screen.

Next type in "vino" and click on "Desktop Sharing" under Applications or under Settings.

Next click "Allow other users to view your desktop". Make sure "Allow other users to control my desktop" is also check.

Fix Adwaita Theme in Fedora 18

In Fedora 18 the Adwaita GTK+ theme has dropdowns messed up in some programs. The text on the drop downs is light grey on white and it's hard to read.

To fix this install the Gnome Tweak tool and a different GTK+ theme:

yum install greybird-gtk2-theme greybird-gtk3-theme gnome-tweak-tool

Then open Tweak Tool. Under "Gtk+ Theme" select "Greybird".

Saving iptables in Fedora 15 or Greater

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.

Change GDM Background and other Settings at Login Prompt

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:

Setting Up Minecraft in Fedora

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:

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