Efter opgradering af WordPress fra version 2.9.? til 3.2.0, har mine permalinks ikke fungeret hvis de indeholdte danske tegn. F.eks. fik man bare en besked om at siden ikke var fundet hvis man gik ind på http://ostehamster.dk/blog/index.php/2011/04/10/løgsuppe-med-ostebrød/.

I tidligere versioner af WordPress blev det modtagne request kørt igennem rawurldecode i parse_request() i wp-includes/classes.php, hvilket er forsvundet i parse_request() i den nye wp-includes/class-wp.php, og derfor findes siden ikke.

Det er nemt at rettet, idet man bare skal indsætte

$req_uri = rawurldecode($req_uri);

efter

$req_uri = $_SERVER['REQUEST_URI'];

i parse_request() i wp-includes/class-wp.php

Eller bruge denne patch.

Set-up the repository

sudo add-apt-repository ppa:ubuntu-mozilla-daily/ppa && sudo apt-get update

Install Firefox

sudo apt-get install firefox-4.0

Thats it, launch it from Programs > Internet > Minefield 4.0 Web Browser

sudo apt-get install bash-completion

Say you want all images to be 1000 pixels wide, simply do

mogrify -resize 1000 *.jpg

If you want all images to be max 100x100 pixels, and keep the aspect ratio do

mogrify -resize 100x100 *.jpg

If you want to force the image to be 100x100 pixels do

mogrify -resize 100x100! *.jpg

Read more at http://www.imagemagick.org/script/mogrify.php

If you fstab line for the USB disk looks like

/dev/sdc2 /nas/data ext3 errors=remount-ro 0 1

You should get the UUID of /dev/sdc2 by running

blkid /dev/sdb2

Which gives something like

/dev/sdb2: LABEL="maxtor_b_data" UUID="b7a042b2-60c6-4116-8324-065a3d23520d" TYPE="ext3"

Change the fstab line to

UUID=b7a042b2-60c6-4116-8324-065a3d23520d /nas/data ext3 errors=remount-ro 0 1

And you are ready to go :)

function get_rev() {
	return (int)substr(substr('$Rev: 168 $', 6), 0, -2);
}

And add the Revision keyword to the properties of the file

svn propset svn:keywords Revision your_file.php

"$Rev: 168 $" will then automatically be updated on every commit.

sudo add-apt-repository ppa:jacob/evo230
sudo apt-get update
sudo apt-get dist-upgrade

I hope this is more stable!

Uninstall the repository version of flash

sudo apt-get remove flashplugin-installer nspluginwrapper

Get the Adobes Linux version from http://labs.adobe.com/downloads/flashplayer10_64bit.html and install it:

wget http://download.macromedia.com/pub/labs/flashplayer10/libflashplayer-10.0.45.2.linux-x86_64.so.tar.gz
tar -zxvf libflashplayer-10.0.45.2.linux-x86_64.so.tar.gz
sudo mv libflashplayer.so /usr/lib/mozilla/plugins/
rm libflashplayer-10.0.45.2.linux-x86_64.so.tar.gz

Restart Firefox

Update: June 6th
I have switched back to the "Ubuntu" Flash, because I was unable to use pages from ipapercms.dk:

sudo rm /usr/lib/mozilla/plugins/libflashplayer.so
sudo apt-get install flashplugin-nonfree

The flickering seems to disappear when all the fancy visual effects are disabled.

In this case I have a system with a lot of users, each of which is mapped to a group. The groups are defined as a tree structure, but because of the roles of the system, the leaf node can never be more than three nodes away from the root. I need to show a list of, say all users not logged in the last 2 months, and the list should show in which groups the users is located.

I could find all users, get the group id from each users and with a recursive function in the application, find the parent group id of the group, get this group from the database, find the parent group id of the group, get this group from the database..... This would require a lot of database activity. It is also possible to make nested sets or stored procedures, but if the depth of the three is relative low (and known), I believe the below is simpler.

The table of groups is defined as:

CREATE TABLE `groups` (
	`gid` INT NOT NULL AUTO_INCREMENT PRIMARY KEY ,
	`pgid` INT NOT NULL ,
	`title` VARCHAR( 100 ) NOT NULL 
) ENGINE = MYISAM ;

With these groups:

mysql> select * from groups;
+-----+------+---------+
| gid | pgid | title   |
+-----+------+---------+
|   1 |    0 | Level 1 |
|   2 |    1 | Level 2 |
|   3 |    2 | Level 3 |
|   4 |    3 | Level 4 |
|   5 |    4 | Level 5 |
+-----+------+---------+
5 rows in set (0.00 sec)

With the below query, it is possible to make the backtrace using joins. Line 6 will find the record holding the parent group of the selected group as the temporary record bt1. Line 7 will then use the parent group id from bt1 to find this group as bt2, and so on.

1
2
3
4
5
6
7
8
9

SELECT groups.gid, groups.title, 
	bt1.gid AS 'gid-1', bt1.title AS 'title-1', 
	bt2.gid AS 'gid-2', bt2.title AS 'title-2', 
	bt3.gid AS 'gid-3', bt3.title AS 'title-3'
FROM groups
	LEFT JOIN groups AS bt1 ON bt1.gid = groups.pgid
	LEFT JOIN groups AS bt2 ON bt2.gid = bt1.pgid
	LEFT JOIN groups AS bt3 ON bt3.gid = bt2.pgid
WHERE groups.gid IN (1,2,3,4,5);

The result is

+-----+---------+-------+---------+-------+---------+-------+---------+
| gid | title   | gid-1 | title-1 | gid-2 | title-2 | gid-3 | title-3 |
+-----+---------+-------+---------+-------+---------+-------+---------+
|   1 | Level 1 |  NULL | NULL    |  NULL | NULL    |  NULL | NULL    |
|   2 | Level 2 |     1 | Level 1 |  NULL | NULL    |  NULL | NULL    |
|   3 | Level 3 |     2 | Level 2 |     1 | Level 1 |  NULL | NULL    |
|   4 | Level 4 |     3 | Level 3 |     2 | Level 2 |     1 | Level 1 |
|   5 | Level 5 |     4 | Level 4 |     3 | Level 3 |     2 | Level 2 |
+-----+---------+-------+---------+-------+---------+-------+---------+
5 rows in set (0.00 sec)

This is not really a recursive call as the title says, but the result is the same, though much faster :)

Required tools
The EDK needs make, which must be called gmake. The easiest way is to install build essential and make a symlink from make to gmake. Futhermore fxload is needed for firmware upload and motif for the GUI.

sudo apt-get install fxload build-essential motif-clients
sudo ln -s /usr/bin/make /usr/bin/gmake

If you have purchased a development board from Xilinx, use the included DVD:

cd /media/cdrom
sudo ./xsetup

If not, follow the download link at the above URL, and download the ISE Design Suite: Full DVD, which is roughly 5.6 GB and untar it:

mkdir ise
cd ise
tar -cvf Xilinx_11.1_ISE_DS_SFD.tar
cd Xilinx_11.1_ISE_DS_SFD
sudo ./xsetup

You do not need to use sudo, but if all users on the system should use EDK, it will be installed in /opt/Xilinx/ using sudo. If sudo is not used, it will be installed in /home/username/.

The installation process is straight forward, and will guide you to setting up a license in the last step. If you choose to use the 30-day trial, a browser will open the Xilinx license system, which will generate the license, download it and install it.

Start up scripts

In order to start xps the environment variable $XILINX must hold the path to ISE. To start xps type

export XILINX=/opt/Xilinx/11.1/ISE/ && /opt/Xilinx/11.1/EDK/bin/lin/xps

Start by finding you current kernel

uname -r

which will give something like

2.6.24-25-server

Now, find all installed kernels

aptitude search linux|grep linux-image | grep "i   "

which will give something like

i linux-image-2.6.24-12-server - Linux kernel image for version 2.6.24 on x
i linux-image-2.6.24-14-server - Linux kernel image for version 2.6.24 on x
i linux-image-2.6.24-15-server - Linux kernel image for version 2.6.24 on x
i linux-image-2.6.24-16-server - Linux kernel image for version 2.6.24 on x
i linux-image-2.6.24-17-server - Linux kernel image for version 2.6.24 on x
i linux-image-2.6.24-18-server - Linux kernel image for version 2.6.24 on x
i linux-image-2.6.24-19-server - Linux kernel image for version 2.6.24 on x
i linux-image-2.6.24-21-server - Linux kernel image for version 2.6.24 on x
i linux-image-2.6.24-22-server - Linux kernel image for version 2.6.24 on x
i linux-image-2.6.24-23-server - Linux kernel image for version 2.6.24 on x
i linux-image-2.6.24-24-server - Linux kernel image for version 2.6.24 on x
i linux-image-2.6.24-25-server - Linux kernel image for version 2.6.24 on x
i linux-image-server - Linux kernel image on Server Equipment.

Purge all of these, except the one found with uname -r and linux-image-server, which is a meta package

sudo apt-get purge linux-image-2.6.24-14-server linux-image-2.6.24-15-server linux-image-2.6.24-16-server linux-image-2.6.24-17-server linux-image-2.6.24-18-server linux-image-2.6.24-19-server linux-image-2.6.24-21-server linux-image-2.6.24-22-server linux-image-2.6.24-23-server linux-image-2.6.24-24-server

The above freed 250 MB from /boot and 550 MB from / at my system.

I Evolution vælger du Rediger -> Indstillinger (eller Shift-Ctrl-S) -> Certifikater -> Kontaktpersoners certifikater -> Importer hvorefter du får mulighed for at importere den hentede .cer fil.

Du skal naturligvis have din egen private signaturfil i Evolution.

• Xilinx XC3S400A-4FTG256C Spartan-3A FPGA
• Four LEDs
• Four CapSense™ switches
• I2C temperature sensor
• Two 6-pin expansion headers
• 20 x 2, 0.1-inch user I/O header
• 32 Mb Spansion® MirrorBit® NOR GL Parallel Flash
• 128 Mb Spansion MirrorBit SPI FL Serial Flash
• USB-UART bridge
• I2C port
• SPI and BPI configuration
• Xilinx JTAG interface
• FPGA configuration via PSoC®

The flash is not updated through a JTAG, but through the USB interface. On Windows the AVprog is used, which can run in Wine and therefore usable on Linux. It is however easier to use the tool called ASTriAEKiPro 1.2.1.

Download a newest .deb file from http://sourceforge.net/projects/fpgalibre/files/ASTriAEKiPro/ and install it with:
sudo dpkg -i astriaekipro_1.2.1-2_i386.deb

Using ASTriAEKiPro
Get a bit file for the kit, either from the CD in the package or from the Avnet Design Resource Center, go to the Avnet Spartan-3A page and click on "Support files and downloads", login and get the "Default Serial Flash Factory Image" file.

To write to the SPI flash use:
astriaekipro -w Spartan3AEval_FPGA_Firmware_V10.bit

To verify:
astriaekipro -y Spartan3AEval_FPGA_Firmware_V10.bit

ASTriAEKiPro can furthermore be used as a terminal, which makes it possible to use the USB as serial interface for a MicroBlace etc.:
astriaekipro -t

Which will give you something like:

*******************************************************************
*                    _____                                        *
*                   /     \                                       *
*                  /____   \____                                  *
*                 / \===\   \==/                                  *
*                /___\===\___\/  AVNET                            *
*                     \======/   ENGINEERING                      *
*                      \====/    SERVICES                         *
*                                                                 *
*******************************************************************
*              Spartan 3A Eval Demo V1.0 5/2008                   *
*******************************************************************
* Current Device Status:                                          *
*                                                                 *
*   EF1:  DEACTIVATED                                             *
*   EF2:  DEACTIVATED                                             *
*   EF3:  DEACTIVATED                                             *
*   EF4:  Connected To FPGA System Reset                          *
*   TMP:   29.1250 C                                              *
*   U22:  S29GL032N DETECTED                                      *
*******************************************************************
Type  for command options. 

ADS>

and install
sudo mkdir /home/Xilinx/
sudo chmod 777 /home/Xilinx/
cd Xilinx_11.1_WebPack_SFD
./xsetup

Set the installation path to /home/Xilinx/, and follow the installation process.

When the installation is done, you will be asked for a license. Select "Start ISE WebPack" and click next and follow the instructions on the website. When the license is installed, close the browser window and the Xilinx License Configuration Manager.

The installer will ask for installation of updates. This is advisable, but it is imo easier to download the update files from Xilinx homepage. Go to download and "Software Updates".

Untar the file
tar -xf Xilinx_11.4_ISE_DS_lin.tar

and install
cd Xilinx_11.4_ISE_DS_lin
./xsetup

You are now ready to go, by running
/home/Xilinx/11.1/ISE/bin/lin/ise

Hvorefter jeg ændrede /etc/default/locale til at indeholde LANG="da_DK.UTF-8".

Alt virker nu glimrende.

(Husk at logge af og på!)

UPDATE table_name
SET col_name = (REPLACE (col_name, 'foo', 'bar'))
WHERE col_name LIKE '%foo%';

Select Third-Party Software and and check the checkbox for http://archive.canonical.com/ubuntu partner.
Close and accept to reload.

It is now possible to install "acroread" by
sudo apt-get install acroread

Or from System -> Administration -> Synaptic Package Manager, but for some reason it is not found in Ubuntu Software Center?

Update: 2009-11-03 @ 00:56
According to https://wiki.ubuntu.com/SoftwareCenter version 3 of the SoftwareCenter will offer "commercial software for sale". But according to http://www.ghacks.net/2009/10/30/the-new-ubuntu-software-center/ and http://blogs.techrepublic.com.com/opensource/?p=1031 it should be possible to install "commercial/non-free software" in version 3.

In Ubuntu 10.4 the Software Center should replace "Synaptic, Software Sources, Gdebi, and possibly the Update Manager" according to http://en.wikipedia.org/wiki/Ubuntu_Software_Center, so version 3 should be out at that time - I hope :)

Install Eclipse Galileo from repository:

sudo apt-get install eclipse

A number of dependencies are required inside Eclipse, which has to be added. Start Eclipse from the menu, and select Help > Install new software... The below list of update sites has to be added, which is done be typing the URL in "Work with", click Add and then type the name in the name field followed by Ok. Do this for the below update sites (name followed by URL):

EMF, http://download.eclipse.org/modeling/emf/updates/releases/
MyLyn, http://download.eclipse.org/tools/mylyn/update/e3.4/
GEF, http://download.eclipse.org/tools/gef/updates/releases/
DLTK, http://download.eclipse.org/releases/galileo/
Webtool, http://download.eclipse.org/webtools/updates/

PDT
Add http://download.eclipse.org/tools/pdt/updates/2.0/ with name PDT. Open "PDT SDK 2.1.2" and select "PHP Development Tools (PDT) Runtime Feature", click Next twice, accept the license and click Finish.

Subclipse
SVN integration (or one of them) in Eclipse is called Subclipse and is installed through update sites as well. Select Help > Install new software... and add http://subclipse.tigris.org/update_1.6.x into the "Work with" field and click Add type "Subclipse" in name and click Ok. Select all three options and click Next, Next, accept License and click Finish.

Checking out a project
Select File -> New -> Other in the new window select SVN -> Checkout Projects from SVN and click Next.

Select "Create a new repository location", click Next. Type SVN repository in URL, click Next. Type username and password if required. Select the part of the repository containing the project, click Finish.

If the repository not already holds project settings for Eclipse, select "Check out as a project configured using the New Project Wizard" and click Finish. In the New Project Wizard select PHP -> PHP Project and click Next. Give the project a name and you are ready to go - have fun! :)

Unfortunately, the installer (the alternative one) do not recognise the encrypted hard drive, and is therefore not able to use it. This little guide helps you to reuse your LVM layout - and your data!

NB: Use this guide at your own risk!

Follow the installation until "Set up network", then press ctrl-alt F2 to start a console and run

modprobe dm-crypt
cryptsetup luksOpen /dev/sda5 sda5_crypt


Replace /dev/sda5 with your encrypted partition. You will now be prompted for your passphrase for the encrypted partition, after which you run

vgscan
vgchange -ay

in order to activate the lvm volumes.

Press ctrl-alt f1 to get back to the installer. When asked for partition method select Manual, and your encrypted LVM volumes are now on the list. You still need to set mount points etc., and remember NOT to mark them for formatting. Continue the installation.

Boot into rescue with your LVM root volume as /

Find the unique id for this "disk" from:
ls -l /dev/disk/by-uuid

Insert a line like

sda5_crypt /dev/disk/by-uuid/df05112c-65bf-44a2-b6d1-a740c3444b53 none luks

into /etc/crypttab. Remember to use the uuid found above together with what ever name you have given the device. sda5_crypt will give a device called /dev/mapper/sda5_crypt

To avoid manually typing the uuid, it is possible just to do:
ls -l /dev/disk/by-uuid >> /etc/crypttab
nano - /etc/crypttab

This will copy the entire content of "ls -l /dev/disk/by-uuid" into the bottom of /etc/crypttab, and open the file for editing with nano.

Run update-initramfs -u, reboot and you are ready to go!

tar -zcvf nm.tgz ~/.gconf/system/networking/ ~/.gnome2/keyrings/login.keyring

Caution: This will also backup your keyring!

Restore with:

sudo /etc/init.d/NetworkManager stop
pkill nm-applet
gconftool-2 --shutdown
cd ~/
tar -zxvf nm.tgz
sudo /etc/init.d/NetworkManager start
gconftool-2 --shutdown

Caution: This will overwrite your keyring!

Press Alt & F2 to start "Run program" and enter "nm-applet"

sudo a2enmod vhost_alias

Next you have to make a config file for apache. I only use this setup, and have no other virtual hosts, so I just uses the default config file:

sudo gedit /etc/apache2/sites-enabled/000-default

and make it something like:

<VirtualHost *:80>
   ServerName localhost
   ServerAlias *.localhost

   VirtualDocumentRoot /var/www/htdocs/%1/

   <directory /var/www/>
      AllowOverride AuthConfig Options FileInfo Limit
      Options MultiViews SymlinksIfOwnerMatch
      Order allow,deny
      Allow from all
   </Directory>

   ErrorLog /var/log/apache2/error.log
   LogLevel warn
</virtualhost>

The important part is that there is not DocumentRoot, but instead the line:

VirtualDocumentRoot /var/www/htdocs/%1/

%1 means "the first part" of the domain, so if the domain is customer1.localhost the document root will be /var/www/htdocs/customer1/. There is different settings for this, which can be seen in the Apache doc.

Remember to restart apache:

sudo /etc/init.d/apache2 restart

Now you just have to create all the directories in /var/www/htdocs/ as you like, and add the corresponding sub-domains in the host file:

sudo gedit /etc/hosts

and add the sub-domains

127.0.1.1 customer1.localhost
127.0.1.1 customer2.localhost
127.0.1.1 customer3.localhost

Have fun :)

Update: index page
Creating the directory /var/www/htdocs/localhost/ with the below code in index.php, it is possible to make an index page of all pages.

<?
$dir_handle = @opendir("../");

while ($file = readdir($dir_handle)) {
if($file!="." && $file!=".." && $file!="localhost") echo "<a href='http://$file.localhost'>http://$file.localhost<br />";
}

closedir($dir_handle);

?>

Install the needed software packages:

sudo apt-get install bluez bluez-utils wvdial

Enable bluetooth on your phone, scan for it and copy the address for your phone.

hcitool scan

The next step is to find the channel for the phone's dialup service. Run

sdptool browse xx:xx:xx:xx:xx:xx

where xx:xx:xx:xx:xx:xx is the address found in the previous step. Look for "Service Name: Dial-Up Networking", and note the channel number.

The phone now has to be bound as a rfcomm device, which is configured in /etc/bluetooth/rfcomm.conf. Add

rfcomm4 { bind yes; device xx:xx:xx:xx:xx:xx; channel 2; comment "Serial Port"; }

to the file with the numbers found above.

Now make a configuration file for wvdial

sudo gedit /etc/wvdial.conf

with this content:

[Dialer Defaults]
Modem = /dev/rfcomm4
Baud = 115200
Init1 = ATZ
Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
Init3 = ATM0
Init5 = AT+CGDCONT=1,"IP","internet"
ISDN = 0
Modem Type = Analog Modem
Phone = *99***1#
Username = foo
Password = bar

Thats it. I use the commands below to start the connection. First shut down wlan0, which should not be necessary, but sometimes DNS won't work if wlan0 is searching for access points. I restart bluetooth in order to make sure the phone is bound, and finally, I run wvdial to start the connection.

sudo ifconfig wlan0 down
sudo /etc/init.d/bluetooth restart
sudo wvdial

A standard Ubuntu installation with encrypted hard drive will give you a boot partition and a LVM partition with two logical volumes. If your computer name is “Ubuntu”, the volume group will typically be called Ubuntu, with two volumes: root and swap.

In order to make a logical volume for /home and for /, do the following:

Start by booting onto the alternative version of the Ubuntu cd - the one without LiveCD - and select rescue. The system will automatically find you encrypted and ask for the password. When starting the terminal, you will have to mount a partition - select your boot partition, on my computer /dev/sda1

Make all volume groups active:

sudo lvm vgchange -a y

Run disk check on the volume:

sudo e2fsck -f /dev/mapper/ubuntu-root

Resize the file system to 10G

sudo resize2fs -f /dev/mapper/ubuntu-root 10G

Wait... make some coffee... maybe even bake a cake, there is time enough :)

Resize the volume to 10G

sudo lvreduce -L10G /dev/mapper/ubuntu-root 10G

Important: you have to shrink the file system before the logical volume!

Display how much free space the LVM group has, the first number is free "extents" and the second is in GB, MB etc.

sudo vgdisplay | grep Free

Create the new volume, -l specify the size in extens, -L in GB, MB etc.

sudo lvcreate -l 50 -n home ubuntu

Make the file system

sudo mke2fs -j /dev/ubuntu/home

sudo vol_id /dev/mapper/ubuntu-home | grep ID_FS_UUID=

will give the UUID for the "device", which can be used in /etc/fstab like:

# /dev/mapper/ubuntu-home
UUID=37563b54-50e5-486c-8796-2df55598fb63 /home ext3 relatime 0 2

Of cause you will have to move all data from /home to the new volume, before mounting it at home!


sudo mkdir /var/lib/svn/NAME
sudo trac-admin /var/lib/trac/NAME initenv
sudo trac-admin /var/lib/trac/NAME permission add USERNAME TRAC_ADMIN
sudo chown -R www-data /var/lib/trac/
sudo chown -R www-data /var/lib/svn/


Use the admin tool on the webpage to setup rights.

Apache2 setup:

# Trac support
<location /trac>
AuthType Basic
AuthName "Trac"
AuthUserFile /etc/apache2/dav_svn.passwd
Require valid-user

SetHandler mod_python
PythonHandler trac.web.modpython_frontend
PythonOption TracEnvParentDir /var/lib/trac
PythonOption TracUriRoot "/trac"
</location>