¡darandandunguen! » Linux

HOWTO: Mr. SID support in MapServer 5

manu — Wed, 06 Feb 2008 10:58:01 +0000

To add support to images in mrsid format, a library developed by Lizardtech is needed. This is propietary software so I’ve cropped this part out of my main article on MapServer 5.

GeoDSK
First of all we need GeoSDK from Lizardtech (You’ll be asked to register to be able to download it). The file comes in several flavours (different kernel, gcc, glibc and libstdc++ versions), the one that best suits us is the gcc 3.4 one [Geo_DSDK-6.0.7.1407.linux.x86.gcc34.tar.gz].

Current RHEL5 gcc version is 4.2 but there are compat packages for gcc-3.4. We need them:

rpm -i /mnt/cd2/Server/compat-gcc-34-3.4.6-4.i386.rpm /mnt/cd2/Server/compat-gcc -34-c++-3.4.6-4.i386.rpm

Now it’s time to untar GeoSDK to a suitable location:

tar xzvf Geo_DSDK-6.0.7.1407.linux.x86.gcc34.tar.gz -C /usr/local/

This is a binary distribution so no more work is needed here.
GDAL
Support is actually provided by GDAL library so we have to recompile it using our compat gcc and libstdc++ packages.

CC=gcc34 CXX=g++34 ./configure --with-png \ --with-libtiff \ --with-jpeg \ --with-gif \ --with-pg=/usr/local/pgsql/bin/pg_config \ --with-geos \ --with-odbc \ --with-mrsid=/usr/local/Geo_DSDK-6.0.7.1407/ make make install ldconfig

Done! Of course, you may refer to my main article on MapServer 5 for all the details.

Microsoft claims software like Linux violates its patents – May 14, 2007

manu — Wed, 16 May 2007 09:59:42 +0000

Microsoft claims software like Linux violates its patents and Linus Torvalds says they better prove it.

, aquí tenéis un resumen en cristiano y aquí la discusión que se ha generado en Barrapunto.

Stallman aún no ha abierto la boca, pero Linus sí, y dice que si las patentes de Microsoft fuesen lo suficientemente legítimas, abrían ido a los tribunales y no estarían simplemente sembrando miedo entre los usuarios de Linux..
ACT: Parece que la estrategia del terror de Microsoft está funcionando.

Comprometida la versión 2.1.1 de Worpress

manu — Sat, 03 Mar 2007 12:20:08 +0000

Al parecer, los servidores de Wordpress han sido comprometidos y un cracker desconocido ha modificado los ficheros de la versión 2.1.1 e instalado un exploit (código para poder atacar los servidores que lo instalen con facilidad) por lo tanto se pide a todo el mundo que actualice sus blogs a la versión 2.1.2. En debian aún no ha salido el paquete de actualización pero podéis actualizaros por las bravas así:
cd /tmp/ wget http://wordpress.org/latest.tar.gz tar xzvf latest.tar.gz cp -R wordpress/* /usr/share/wordpress/ rm -rf wordpress latest.tar.gz
Los chicos de Wordpress han revisado todo el código de esta versión, así que debe ser segura de nuevo. Por otro lado también están revisando las políticas de seguridad de sus servidores y auditando el servidor atacado así que esperad montones de información durante los próximos días.

Being Nerd

manu — Fri, 26 Jan 2007 15:40:31 +0000

I’ve loved the (rather nerdy) idea that my friend Julio has blogged about. Basically he wonders what are the most common commands he types on console (I know everyone that has worked besides him could tell you that it’s clear but he wanted a proof). So he worked out this command:
history | awk '{print $2}' | sort | uniq -c | sort -nr | head -5
to see which are his five most used commands. I’ve done the same on this machine and these are the results:

My user:

129 ssh
109 su
74 startx
52 ldapvi
18 ./spamUpdater.sh

spamUpdater.sh is a little sell script I wrote to feed spamassassin’s database (through sa-learn) with the spam that arrives to my mailbox.

root user:

67 emerge
64 dhcpcd
37 halt
34 /etc/init.d/net.eth0
24 reboot

So, as a good nerd, I spend more time updating this machine than doing anything more productive.

dilbert & Linux :)

manu — Fri, 26 Jan 2007 14:16:05 +0000

Dilbert

Using a Huawei E620 3G card in linux

manu — Thu, 11 Jan 2007 16:38:06 +0000

I’ve been using an option GPRS card for a while (without any problems) so I was very eager to try the new HSDPA cards in my linux laptop. It works like a charm (I’m so happy )
Well, now the facts, what you need to make the card work?

A working PCMCIA port
To have the card detected as 3 USB Serial ports
PPP Drivers
Wvdial installed and configured

I’ll assume you have the pcmcia subsystem up and working (else google is your friend).

Secondly, you need the usbserial module. If you don’t have it available, you’ll need a kernel recompilation, else just load it with modprobe usbserial. Once loaded, when you plug the card on the PCMCIA slot, you’ll see a bunch of messages in your syslog, look for these three:

[...] Jan 11 19:47:50 acsev-109 pl2303 6-1:1.0: pl2303 converter detected Jan 11 19:47:50 acsev-109 usb 6-1: pl2303 converter now attached to ttyUSB0 Jan 11 19:47:50 acsev-109 pl2303 6-1:1.1: usb_probe_interface Jan 11 19:47:50 acsev-109 pl2303 6-1:1.1: usb_probe_interface - got id Jan 11 19:47:50 acsev-109 pl2303 6-1:1.1: pl2303 converter detected Jan 11 19:47:50 acsev-109 usb 6-1: pl2303 converter now attached to ttyUSB1 Jan 11 19:47:50 acsev-109 pl2303 6-1:1.2: usb_probe_interface Jan 11 19:47:50 acsev-109 pl2303 6-1:1.2: usb_probe_interface - got id Jan 11 19:47:50 acsev-109 pl2303 6-1:1.2: pl2303 converter detected Jan 11 19:47:50 acsev-109 usb 6-1: pl2303 converter now attached to ttyUSB2 Jan 11 19:47:50 acsev-109 usbcore: registered new interface driver pl2303 Jan 11 19:47:50 acsev-109 drivers/usb/serial/pl2303.c: Prolific PL2303 USB to serial adaptor driver Jan 11 19:47:50 acsev-109 drivers/usb/serial/usb-serial.c: USB Serial support registered for GSM modem (1-port) Jan 11 19:47:50 acsev-109 usbcore: registered new interface driver option Jan 11 19:47:50 acsev-109 drivers/usb/serial/option.c: USB Driver for GSM modems: v0.7.1

If you can’t see those three messages, it just won’t work (again, google is your friend)

Install PPP: modprobe ppp.

Install and configure wvdial. Install it your preferred way (apt-get it, install from source, use emerge or rpm or whatever), then edit the file /etc/wvdial.conf. These are the settings needed for Vodafone users in Spain. People from other countries should try Tazz Tux’ files on mybroadband.co.za forums.

[Dialer Defaults]


Phone = *99***1#

Username = username

Password = password

Stupid Mode = 1

Dial Command = ATDT
[Dialer pin]
Init1 = AT+CPIN=XXXX

# You should change the XXXX for your PIN code

[Dialer option]
Modem = /dev/ttyUSB0

Baud = 460800

Init2 = ATZ

Init3 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0

ISDN = 0

Modem Type = Analog Modem
[Dialer internet]
Init5 = AT+CGDCONT=1,"IP","ac.vodafone.es";

Although there’s a PIN section in the code, I have never been able to use any of my cards with PIN code enabled so I’ll just disable it (I’ve put the SIM card in my phone and told it not to ask for PIN anymore). Then just exec wvdial: wvdial option internet. Enjoy!

Feedback is welcome

Using find to use sed on multiple directories

manu — Fri, 10 Nov 2006 10:48:08 +0000

Sed is a powerful line editor which can be used to modify text files in a non-interactive manner. Explaining it’s use would be to lengthy so I’ll just paste here it’s man page. The problem is that sed doesn’t allow us to use it across subdirectories but this can be easily achieved using find:
find ./ -type f -exec sed -e '[expression]' {} \;

Driver Router SpeedTouch 580

manu — Sun, 05 Nov 2006 12:24:52 +0000

This is one of the most commons search terms in Google for people who comes to my blog. In this week people have searched (among others):

drivers router inalambrico speed touch wanadoo
configurar speedtouch 580 linux
drivers thompson speedtouch 580
speedtouch 580 driver

I’ve never written about this before because there’s no driver to use, you simply don’t need any. A router is not a modem, a router is a machine in itself, and so, you only need to configure the communication between two machines, your computer and the computer named router SpeedTouch 580.

My router came with these default parameters:

user: admin
password: (en blanco)
IP address: 192.168.0.1

You should read the manual to see the defaults for your router. I’ll assume that your router has the same IP as mine:

Attach an ethernet wire between your computer and the router. The ethernet port is the one marked in green.
Use an appropriate address in your computer (like 192.168.0.2 netmask 255.255.255.0) and use the router address as default gateway.
- Linux:Open a root console and type
  ifconfig eth0 192.168.0.1 netmask 255.255.255.0 up route add default gw 192.168.0.1
- Windows: Type the values in TCP/IP configuration under Network properties
- Mac: I don’t know.
Type in an internet browser the address of the router, 192.168.0.1, and use your user and password to access the router configuration page. Follow the instructions in the manual.
If you have questions use the comments and I’ll try to solve them

Mata al bloqueo de mayúsculas

manu — Fri, 03 Nov 2006 09:55:02 +0000

Sí, me refiero a esa tecla. Si no entiendes qué pinta ese reducto del pasado en nuestros teclados y, como yo, sólo la pulsas por equivocación, deshazte de ella, vete a la consola y ejecuta:

xmodmap -e 'remove Lock = Caps_Lock' xmodmap -e 'keysym Caps_Lock = Shift_L' xmodmap -e 'add Shift = Shift_L'

¡Tachán! El engendro ha pasado a ser otro botón de mayúsculas normal y corriente. Para hacer los cambios permanentes, añádelos al archivo .profile

embedded linux

manu — Sun, 29 Oct 2006 09:14:19 +0000

Esto es a lo que dedico ahora la mayor parte de mi tiempo para linux (media jornada laboral, aprox). Tras pasar tanto tiempo con procesadores mainstream, ha sido raro iniciarse en un mundo de compiladores cruzadores, librerías recortadas al máximo para cuidar el (poco) espacio disponible, bugs con los que nadie se ha encontrado antes (somos pocos aún),… Pero reconozco que es muy divertido.

La máquina con la que trabajo es un i.MX21, una placa de desarrollo de motorola basada en un micro ARM9.

Las distribuciones con las que estoy trabajando (por ahora) son básicamente las que más me gustan para máquinas grandes: Gentoo y Debian, pero en sus respectivas versiones para dispositivos embebidos: emdebian y embedded gentoo

Y el resultado lo podéis ver en VisioWay.

Si os dedicáis también al desarrollo de estos juguetitos, los comentarios están a vuestra disposición