Setting Up Git Server Through SSH Connection

Here I find a nice clear working guide

http://fclose.com/b/linux/366/set-up-git-server-through-ssh-connection/

 

HTML Maps

Here a nice free on-line tool to generate html maps

http://www.image-maps.com/

dm-crypt (luks) on (loopback) file

Initialization

1. dd if=/dev/zero of=fs.bin bs=1M count=5
2. losetup /dev/loop1 fs.bin
3. cryptsetup luksFormat /dev/loop1

Open and mount

1. cryptsetup luksOpen /dev/loop1 fs.bin
2. mkfs.ext3 /dev/mapper/fs.bin
3. mkdir crypted
4. mount /dev/mapper/fs.bin crypted

Umount and close

1. umount crypted
2. cryptsetup luksClose fs.bin
3. losetup -d /dev/loop1

QR code generator

Fantastic QR code generator http://keremerkan.net/qr-code-and-2d-code-generator/

Change video container

How to change the video container using ffmpeg (avoiding re-encoding):

ffmpeg -i inputfile.mp4 -vcodec copy -acodec copy outputfile.mkv

Compression tools: comparison on different inputs

I compress on a AMD Athlon(tm) 64 X2 Dual Core Processor 5600+ running a Debian wheezy 64 bit 18 psd files (32 MB) .

Here are the results.

Tools	Version	Elapsed time (s)	Compressed size (MB)
gzip	1.4	-	6.8
bzip2	1.0.5	-	5.5
lzma	4.32.0beta3	-	1.1
xz	5.1.0alpha	-	1.1

I compress on a AMD Athlon(tm) 64 X2 Dual Core Processor 5600+ running a Debian wheezy 64 bit a 550 MB syslog file.

Here are the results.

Tools	Version	Elapsed time (s)	Compressed size (MB)
gzip	1.4	12	31
bzip2	1.0.5	245	20
lzma	4.32.0beta3	600	14
xz	5.1.0alpha	242	19

Configuring Multiple Default Routes in Linux

Wonderful guide here

How to connect to multiple databases within Drupal

It seems very simple, in particular using drupal 7.

link

 

Corrupted Fat-formatted SD card

A Pentax (k-x) reflex digikam seems to corrupting the filesystem damaging the .DNG stored in it.

When i noticed this strange behaviour i create a bit-a-bit copy od the sd card (using fastdd) and i tried to restore the files with 3 tools: foremost, tsk (using sniper) and testdisk/photorec.

Here is the results:

foremost: 2/204

tsk (with sniper): active file 59/67 deleted file 4/130

photorec: 193/193

Legenda: good pic / total recovered pic

DNG header and footer

To carve DNG file (raw image) you can try my header/footer signatures.
I’ve tested them with foremost.

dng y 10000000000 \x4d\x4d\x00\x2a \x1f\xff\xd9