Howto change the extension of multiple files

This happens to me when I'm importing photographs, I end up with files called .JPG or .jpeg and I prefer .jpg.

for file in *.JPG
do

Howto loop based on some iterator

Say you have some files named a100 to a200 that you want to rename to b200 to b100 (it really does happen).

y=200
for x in `seq 100 200`
do
   mv a$x b$((y--))
done

seq is a fairly useful tool, it can also take a reversed list.

for x in `seq 200 -1 100`
do
printf "$x "
done

Bash'isms

There are probably a million better ways to do these, but these are tricks that I keep using (I'm well on my way to becoming an old crusty unix guy :-( )

Howto watch progressive scan dvd's or gamecube on a VGA only LCD projector

I purchased a Proxima DPP6850 off ebay. Because the projector is a few years old, it doesn't have any component video capability. It has composite, s-video and two rgbvh (VGA) inputs.

ICMP Parameters and my iptables table

The Internet Control Message Protocol (ICMP) has many messages that are identified by a "type" field. I use the types to specify what actions to take in my custom iptables config.

Howto get progressive scan on Nintendo Gamecube

Digital AV Out

To watch Gamecube games in progressive scan, you need to have a gamecube with digital out. Since 2004, Nintendo took the digital port off the gamecube. You can get your gamecube replaced with a model with the port directly from Nintendo.

Linux

PU_IAS Linux

AuroraLinux on an UltraBook

  • Black/Blank Screen First time I tried it, kernel boots then nothing.

RHEL4 on Thinkpad T43p (T43 too)

Sleeping

First problem, sleeping, the SATA bridge doesn\'t sleep properly and therefore doesn\'t come back after resume. The infamous SATA ACPI patch at http://lkml.org/lkml/2005/9/23/97 seems to have solved this for me. I added the patch to the latest FC4 rpm and renamed (to be polite).

About

Thomas Howard Uphill/Thomas Uphill Thomas Howard Uphill

Currently working as a Puppet Engineer at Wells Fargo. Red Hat Certified Architect with 10 years of Red Hat experience. Puppet and python aficionado who enjoys automating complex tasks. Available for remote contract work.

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