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A chronological documentation test project, nothing serious, really!
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29 May 2007 mod_rewriting an entire site

Using mod_rewrite to redirect all pages to one central PHP page’.

On my site, I decided to use an all-index structure, as that’s how I prefer to do things – it means that the scripting language is more hidden from the end user than if you linked to pages such as “something-bizarre.jsp” and means that if the scripting language used to create the pages was changed the names of the pages wouldn’t have to be. (more…)

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29 May 2007 mod_rewrite, a beginners guide (with examples)

mod_rewrite is used for rewriting a URL at the server level, giving the user output for that final page. So, for example, a user may ask for http://www.somesite.com/widgets/blue/, but will really be given http://www.somesite.com/widgets.php?colour=blue by the server.
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28 May 2007 A EXIF dater script

The script below will take a filename eg: DSCN0001.JPG, extract the “Image Created” metadata and rename the original file to something like 2006-03-23_DSCN00001.JPG and it will do it automatically for you.

#! /bin/shfunction usage() {if [ $# -ne 1 ]; then    echo "ExifDater - version 0.1 - March 23 2006"    echo "El-Lotso ”    echo “This  is  free  software;  see the source for copying conditions.”    echo “There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR”    echo “A PARTICULAR PURPOSE.”    echo    echo “ExifDater utilises the exiftags( http://johnst.org/sw/exiftags/)”    echo “program to sequentially extract the image creation date from”    echo “JPEG EXIF headers.”    echo    echo “Usage:”    echo “$0 /path/to/jpg/directory”    exit 0fi}function exiftimexist(){which exiftime > /dev/null 2>&1if [ $? -ne 0 ]; then    echo    echo “Unable to locate exiftime binary”    echo “Please make sure it is installed and is in your path.”    echo    exit 0fi}function gotodir(){cd $1 > /dev/null 2>&1if [ $? -ne 0 ]; then    echo    echo “Directory does not exists”    echo “Please try again.”    echo    exit 0fi}function jpgexist(){find . -iname “*.jpg” -type f >/dev/null 2>&1if [ $? -ne 0 ]; then    echo    echo “There are no JPEG pictures in this directory”    echo “Please try again.”    echo    exit 0fi}function myexifdater(){for i in *.jpgdo    create_date=`exiftime “$i” 2>&1 | grep -i image created | cut -d” ” -f3 | sed -e ’s/:/-/g’`    if [ “$create_date” == “” ]; then        echo -e “SKIPPING IMAGE $i \t\t\t [NO EXIF DATA FOUND]”        continue    fi    echo -n Processing Image $i Created on $create_date    do_rename=$( echo $i | sed -e ’s/(.*)/mv “&” “‘$create_date’_1″/g’|sh)    echo -e \t[DONE]done}usage $1exiftimexistgotodir $1jpgexistmyexifdater

Usage: ExifDater /your/picture/pathDownload the ExifDater script.There is also a Windows version of a program that’s called ExifDater for those who need that :)Source: http://lotso.livejournal.com/2006/03/23/

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25 May 2007 Strip comments from config files

This is at short script to strip/remove comments from config files

#!/bin/bash
# Code to cat a config file removing all comments and blank lines.

grep -vh '^[[:space:]]*#' "$@" | grep -v '^$'

Usage: ./confcat.sh /etc/make.conf

Alternativ is to use sed

cat filename | sed -e 's/#.*//;/^\s*$/d' "$@"

This also strips comments at the end of a line, though it looks a little bit ugly

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24 May 2007 Tunneling ports with SSH

Using -L on the command line with SSh will bind a remote port to a local one. For instance, if you wanted to tunnel the port for a remote desktop (usually 5901) to a local machine, you would type the following

ssh -L 5901:localhost:5901 remote_ip

You could then access your remote desktop by connecting your VNC client to port 5901 on the local machine, and the data for the remote desktop would be tunneled through the SSH connection.

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