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LTFS – Linear Tape File System

Tuesday, 17 October 2017

Linear Tape File System (LTFS) allows files stored on magnetic tape to be accessed in a similar fashion to those on disk or removable flash drives. It requires both a specific format of data on the tape media and software to provide a file system interface to the data.

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Raspberry Pi: eibd with a KNX USB Interface

Saturday, 23 September 2017

Raspberry Pi: eibd with a KNX USB Interface.

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Raspberry Hot Backup

Saturday, 21 January 2017

#!/bin/bash
# Usage instructions at http://www.megaleecher.net/Best_Raspberry_Pi_Hot_Backup_Shell_Script
# This version disables backup image compression as it takes too much time on Pi, to enable uncomment the relavent lines
# Setting up directories, Just change SUBDIR and DIR varibales below to get going
SUBDIR=raspberrypi_backups
DIR=/media/ExternalHd/$SUBDIR
echo “Starting RaspberryPI backup process!”
# First check if pv package is installed, if not, install it first
PACKAGESTATUS=dpkg -s pv | grep Status;
if [[ $PACKAGESTATUS == S* ]]
then
echo “Package ‘pv’ is installed.”
else
echo “Package ‘pv’ is NOT installed.”
echo “Installing package ‘pv’. Please wait…”
apt-get -y install pv
fi
# Check if backup directory exists
if [ ! -d “$DIR” ];
then
echo “Backup directory $DIR doesn’t exist, creating it now!”
mkdir $DIR
fi
# Create a filename with datestamp for our current backup (without .img suffix)
OFILE=”$DIR/backup_$(date +%Y%m%d_%H%M%S)”
# Create final filename, with suffix
OFILEFINAL=$OFILE.img
# First sync disks
sync; sync
# Shut down some services before starting backup process
echo “Stopping some services before backup.”
service apache2 stop
service mysql stop
service cron stop
# Begin the backup process, should take about 1 hour from 8Gb SD card to HDD
echo “Backing up SD card to USB HDD.”
echo “This will take some time depending on your SD card size and read performance. Please wait…”
SDSIZE=blockdev --getsize64 /dev/mmcblk0;
pv -tpreb /dev/mmcblk0 -s $SDSIZE | dd of=$OFILE bs=1M conv=sync,noerror iflag=fullblock
# Wait for DD to finish and catch result
RESULT=$?
# Start services again that where shutdown before backup process
echo “Start the stopped services again.”
service apache2 start
service mysql start
service cron start
# If command has completed successfully, delete previous backups and exit
if [ $RESULT = 0 ];
then
echo “Successful backup, previous backup files will be deleted.”
rm -f $DIR/backup_*.tar.gz
mv $OFILE $OFILEFINAL
echo “Backup is being tarred. Please wait…”
#tar zcf $OFILEFINAL.tar.gz $OFILEFINAL
# rm -rf $OFILEFINAL
echo “RaspberryPI backup process completed! FILE: $OFILEFINAL”
exit 0
# Else remove attempted backup file
else
echo “Backup failed! Previous backup files untouched.”
echo “Please check there is sufficient space on the HDD.”
rm -f $OFILE
echo “RaspberryPI backup process failed!”
exit 1
fi

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Install EIBD & LINKNX

Saturday, 7 January 2017

Install EIBD and LINKNX on linux.

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Webcam

Friday, 22 July 2016

A webcam is a video camera that feeds or streams its image in real time to or through a computer to computer network. When “captured” by the computer, the video stream may be saved, viewed or sent on to other networks via systems such as the internet, and email as an attachment. When sent to a remote location, the video stream may be saved, viewed or on sent there. Unlike an IP camera (which connects using Ethernet or Wi-Fi), a webcam is generally connected by a USB cable, or similar cable, or built into computer hardware, such as laptops.

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