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Powerful ultrasonic signals to REPEL PESTS

There are many ultrasonic pest repellent devices available on the market but a major drawback is that their power output is low and their effectiveness suffers. This electronic pest repellent generates powerful ultrasonic signals to repel pests.

In addition to the ultrasonic frequency oscillator built with the CD4047 IC, separate push-pull power amplifier […]

Reducing multiple mp3 bitrate

To convert all mp3 files in directory to a different bitrate, do the following.

1. First, install “lame” if it is not already there.

sudo apt-get install lame

Then, give the following command:

cd < to_mp3_folder>

mkdir outputdir

for f in *.mp3 ; do lame –mp3input -b 32 “$f” “./outputdir/$f” ; done 2. Or you […]

How to fix XBMC buffering issues on Raspberry Pi

1 Steps

If you don’t already have an advancedsettings.xml file, it’s very simple to make. XBMC uses this file for advanced settings and features that normal users shouldn’t modify without first knowing what they do, as well as for experimental features, etc.

1 Since you can use all or just some of the […]

Installation/SoftwareRAID on Ubuntu Server

How to create RAID using Ubuntu Software RAID. Including RAID 0, 1, 5 and 6.

Since 9.10, Ubuntu provides a very easy way to build RAID. You can build a RAID system using the graphical Ubuntu user interface. It does not require using the command-line anymore.

Note: Be aware of the fragile […]

How to check hard disk performance in Ubuntu

Terminal method

hdparm is a good place to start.

sudo hdparm -Tt /dev/sda /dev/sda: Timing cached reads: 12540 MB in 2.00 seconds = 6277.67 MB/sec Timing buffered disk reads: 234 MB in 3.00 seconds = 77.98 MB/sec

sudo hdparm -v /dev/sda will give information as well.

dd will give you information on write speed. […]