How To Join Two Avi files in linux.

I used this method on CentOS5 and used the rpmforge repository to install mencoder (yum install mencoder).

mencoder -forceidx -ovc copy -oac copy -o combinedfilename.avi firstfilename.avi secondfilename.avi

Dealing with daa image files using poweriso.

Download poweriso from http://poweriso.com/download.htm. If you are using linux, the download is a tarball. I extracted the one and only file from the tarball (poweriso).

Sample commands:

List contents:
poweriso list /path-to-daa-file /

List contents recursively:
poweriso list /path-to-daa-file / -r

Extract:
poweriso extract /path-to-daa-file / -od /path-to-destination-directory

Convert:
poweriso convert /path-to-daa-file -o /path-to-destination-iso-file -ot iso

How to determine package containing a perl module.

If you get the following kind of error when using a problem that has some perl module dependencies, you can get the following type of error if you are missing one of the dependencies.

“Can’t locate XX/YYYYYY/ZZZZ.pm in @INC …”

Use the following to determine the package that contains the module:

yum whatprovides ‘perl(XX::YYYYYY::ZZZZ)’

It should work in newer Fedora/CentOS/Redhat releases.

MacOS gcc compiler installation

Download and install the Xcode Tools from the Apple Developer Connection website (http://connect.apple.com).

Fedora 10 with megaraid controller

This controller is found in some older Dell servers.

Install Fedora 10.
Boot of the first install CD in rescue mode and chroot /mnt/sysimage.
cd /boot
mv initrd-2.6.27.5-117.fc10.i686.img initrd-2.6.27.5-117.fc10.i686.img.orig
mkinitrd –with=scsi_wait_scan initrd-2.6.27.5-117.fc10.i686.img
exit
exit # to reboot
This worked fine for me on a Dell1600 with Perc controller. In troubleshooting this, I found some posts saying that the module is call scsi_wait-scan. This is incorrect. Scsi_wait_scan worked fine for me.

Fedora Hard Drive install from ISO image.

If you want install Fedora 10 from the DVD ISO image download to a hard drive, you need to extract the images/install.img into the same directory.

Assume the Fedora-10-i386-DVD.iso file has been downloaded to /download.
cd /download
mount -t iso9600 -o loop Fedora-10-i386-DVD.iso /mnt
mkdir images
cp /mnt/images/install.img images
cp /mnt/isolinux/initrd.img /boot
cp /mnt/isolinux/vmlinuz /boot
vi /etc/grub.conf

title Fedora 10 Upgrade
root (hd0,0)
kernel /vmlinuz ro
initrd /initrd.img

Make sure you note device name for the partition of the /download directory.
Boot up the “Fedora 10 Upgrade”.
Choose Hard drive install.
Choose the correct partition device noted above, and the directory where the iso has been downloaded.

Fedora 10/Ubuntu Intrepid Trackpad configuration

Create the following file /etc/hal/fdi/policy/appletouch.fdi. This is the best place to make configuration in this version of linux. /etc/X11/xorg.conf is no longer the best place.

Put the following in the file:

f10trackpad

Problem unpacking archived Sun software in RHEL5/CentOS5.

Can get the following kind of error when trying unpack archive java software downloaded from the Sun website (http://java.sun.com/products/archive/):

# ./j2re-1_3_1_03-linux-i386-rpm.bin

Do you agree to the above license terms? [yes or no]
yes
Unpacking…
Checksumming…
1
The download file appears to be corrupted. Please refer
to the Troubleshooting section of the Installation
Instructions on the download page for more information.
Please do not attempt to install this archive file.

The solution is to set the following environment variable:

export _POSIX2_VERSION=199209

Linux kernel configuration options using sysctl.

This information is available in /usr/share/doc/kernel-doc-2.6.27.7/Documentation/networking/ip-sysctl.txt when the kernel-doc package installed in RHEL5, CentOS 5, or Fedora. This particular file is from the 2.6.27.7-53 kernel.

Sysctl options

How to access MacOSX boot partions.

To force a MacBook Pro to boot a CD, hold down the C key while rebooting.
To view all the boot options available on a MacBook Pro, hold down the “option” key while rebooting.

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