BUSYBOX - SSHing to a W-Gate Router

I had to ssh ing to this box running a a stripped version of BusyBox witha really tiny ssh server support with Dropbear that wasn't accepting connection from a regular ssh client on Ubuntu.
After succesfully trying connecting with the dbclient (the dropbear client that acts more or less as a ssh client) , dbclient that is available in ubuntu official software I have noticed that thas box need a specific kind of MAC (Message Authentication Code) algorithm to connect.



Using this option ( -o MACs=hmac-sha1 ) the ssh client connected succesfully letting me make the tunnel that I wanted:


ssh -o MACs=hmac-sha1 -vvvl user ip

UBUNTU - pdftk to join 2 pdf, one wiht odd pages and one with even pages

I have 2 files resulting from my network scanner yet in pdf format.
One file has all even pages with correct order ( Pari.pdf ).
The other has all odd pages but with inverted order (Dispari_invertite.pdf)
The document will start with an even page and then I have to shuffle page one by one from every source file.

This is the (impressive for me) one command solution:




pdftk A=Pari.pdf B=Dispari_invertite.pdf shuffle A Bend-1 output collated.pdf


I assume that you have been entered in the working folder before. The "Bend-1" option reverse the order of B file; so if you need to join 2 ordered odd and even files will use "B" instead. Collated.pdf is the output file of course. For me its an impressive one line command that make me love linux terminal to make things quicker and better than installing a lot of dedicated software. Bye

OPENWRT - Using Sanguinololu as USB to serial adapter USB2TTL

I had to connect to the serial interface of a router with OpenWRT, the router is Pirelli AGPF .
My old cable (a CA42 Nokia Cable) was broken, so I tryed with a crappy usb 2 serial adapter with ch340 chip with no luck.

I remeber I have a spare Sanguinololu board that I buyed to replace my old one on my 3D Printer. I have seen is possible to use an Arduino Uno to act as usb to serial interface, so I thinked the Sanguinololu could do the same.

Ok, let me explain...

IMPORTANT : To enable the serial socket we need to short the reset pin to the ground in some way, I used an old jumper to keep the board resetted.

Under the USB female port of the Sanguinololu there is a socket labelled USB2TTL , in my case nothing is soldered to it.
We will use Tx , Rx and Ground on USB2TTL socket.

Could be a good idea to test the socket firing up your favourite program (hyperterminal, putty, minicom ecc) shorting Tx with Rx and check if typing something there is a return on the console.

If you want you can solder some male pins to Rx  , Tx and GND but I found a less invasive solution.
Looking the ATMEGA pinout http://reprap.org/wiki/Sanguinololu#Pin_Assignments

I found these pins on ATMEGA socket that are connected to the corrispective pins under the USB port:

•  ftdi Tx on pin 14
•  ftdi Rx on pin 15 
•  GND on pin 31

So I removed the ATMEGA chip and inserted 3 needles on that and used alligator clips to connect to my router Rx , Tx and GND.

Aggiungi didascalia

This solution seems intresting because is fully reversible without soldering nothing on Sanguinololu board.

Maybe could work in other similar platform where there is an arduino-like board.

By the way .. ther router was successfully recovered.

UBUNTU - Change default font size in Ubuntu 14.04 using terminal

http://askubuntu.com/questions/454279/change-default-system-font-using-terminal-only-in-14-04

UBUNTU - DU (Disk usage)

Per vedere le dimensioni di tutti i file e le cartelle al livello 1  ( non entra nelle sottocartelle)

To show dimension of each file and folder at level 1 (not entering inside subfolders)


du -h -d 1 -t 1G


-h stands for "human readable" (show M for megabytes, G for gigabytes and so on)
-d deep of the folder search
-t threshold size (file bigger than 1 GB)

ANDROID - Reboot phone via ssh for ZTE MD SMART (MIMOSA MINI)

Need rooted phone


 reboot -f

" -f " stands for force , without my phone refuse to reboot

UBUNTU - How to add a missing configuration to Ubuntu 14.04 with xrandr

Hello,
the problem was that, I made a fresh install of Ubuntu 14.04 on a Dell Optiplex 860 , with a AOC e943fws monitor that have a 1360x768 resolution at 60Hz.
The default configuration offers me only 1024x768 or 800x600 resolutions.
I spotted was possible to add the missing resolution with xrandr in this way.

give cvt with resolution and frequency

me@box:~$ cvt 1360 768 60
# 1360x768 59.80 Hz (CVT) hsync: 47.72 kHz; pclk: 84.75 MHz
Modeline "1360x768_60.00"   84.75  1360 1432 1568 1776  768 771 781 798 -hsync +vsync

Then give xrandr --newmode omitting "Modeline" word on the command
 It gives You no output.


me@box:~$ sudo xrandr --newmode "1360x768_60.00"   84.75  1360 1432 1568 1776  768 771 781 798 -hsync +vsync

 
then add new mode to our current output , for me was VGA1


me@box:~$ sudo xrandr --addmode VGA1 1360x768_60.00



Now giving xrandr I obtain this output with the new resolution listed

me@box:~$ sudo xrandr
Screen 0: minimum 320 x 200, current 1024 x 768, maximum 32767 x 32767
VGA1 connected primary 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   1024x768       60.0*
   800x600        60.3     56.2 
   848x480        60.0 
   640x480        59.9 
   1360x768_60.00   59.8 
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
DP2 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)


Now we can change the resolution


 webstation1@webstation1:~$ sudo xrandr --output VGA1 --mode 1360x768_60.00


And for me that works fine.
At this point You will find the new resolution also in Monitor settings.

Bye