Set password for local oracle accounts and let them never expire again

If you are a getting warning messages like this one on your local developer oracle installation,

java.sql.SQLWarning: ORA-28002: the password will expire within 1 days

then there are two easy step to avoid the situation that you are not able to login with a given database user.

Step 1: Set the passsword policy to never expire passwords. Execute this SQL Query with your SYSTEM database user.

ALTER PROFILE DEFAULT LIMIT PASSWORD_LIFE_TIME UNLIMITED;

Step 2: The expiring database user accounts are not affected by the above statements. You have to set a password for them to get rid of the warning and only then is the password never expiring again. You just have to start your “Run SQL Commandline” oracle console and first connect via the sysdba user (don’t be afraid, you don’t need a password for that one).

connect / as sysdba;

When you are connected successfully, just change the password for any database user

alter user SYSTEM identified by NEWPASSWORD;

(Disclainer: I’m no fan of oracle, but in my workplace I have to use it)

XPath evaluating in Chrome

IF you need to find HTML elements in a web page via XPath, it’s desirable to do this with an already existing web page in your browser. in Chrome/Chromium this is especially easy. If you open the web developer tools and switch to the console, you can type something like that

$x(“//*[@id=’list’]”) ;

And the browser will return you the found HTML element (or nothing if it does not exist).

A nice mono laser printer working with linux: Samsung ML1860

If you are looking for a  reasonable priced mono laser printer which works flawlessly under linux: I recommend the Samsung ML series. For example the Samsung ML1860.

For more information how to install the driver, just look here: http://ubuntuforums.org/showthread.php?t=341621

Samsung Series 9 NP900X3A wireless Problems

After installing Ubuntu on my new Samsung Series 9 NP900X3A notebook, I was having massive problems with my wireless connection. The problem was, that the speed of the wireless connection was changing from full speed to transmitting nothing at all. After quite some googling and researching on the web, I found the solution.

gedit /etc/modprobe.d/iwlagn.conf
and add the line:
options iwlagn 11n_disable=1

The wireless controller is from intel… after all, I’m quite happy with the new notebook…

BibTex information for books?

If your are citing books and you are sick of creating the BibTex data for yourself: Cheer up, there is a easy way to get the data created. You just have to get the ISBN Number of the book (easiest by finding the book on wikipedia). Then you use the OttoBib webservice. Just replace the ISBN number in this example

http://www.ottobib.com/isbn/9780199535705/bibtex

Calling this URL gives you

@Book{marx2008capital,
author = {Marx, Karl},
title = {Capital : an abridged edition},
publisher = {Oxford University Press},
year = {2008},
address = {Oxford New York},
isbn = {9780199535705}
}

Easy and a real life saver….

Searching a file with given content recursively in unix

Some time ago I had the problem to search files with a given string in lots and lots of directories with lots and lots of files. Finally I used this command to show me every file in a given directory (plus sub-directories) which contains the search-string.

find . -name "*.php" -print | xargs grep "searchstring"

Means: Search for all php files which contain the string “searchstring”.

Sluggish text input in kde

I use kmail a lot and kile sometimes. Something which bothered me a lot was the sluggish text input of these two kde programs. Characters were shown with a notable delay which made writing painfully.

But  there is a workaround which solved the problem for me.

kmail –graphicssystem raster

Start the program from the console with the additional option –graphicssystem raster

More on this topic can be found in this bug entry https://bugs.launchpad.net/ubuntu/+source/kile/+bug/361843.

Howto embedd videos from Blip.tv on wordpress.com

As far as know, unlike other short codes the values aren’t obvious how they relate to the videos, so the only way I’ve found is to ask Blip for it on a video’s permalink page. For example for http://blip.tv/file/749127/
1. In the left sidebar click the orange Share and select Embed from the drop down.
2. Click the orange Show Player to Embed’s right and select WordPress.com from the drop down.
3. Click the green go! button
4. Copy and paste the generated short code into your blog post here on WordPress.com. In my example the code I copied into my blog post is
[ blip.tv ?posts_id=755336&dest=-1 ] (remove whitespace after/before the brackets)

Source: forums.wordpress.com

Log4j Online Wizard

Have you ever fought with the correct structure of a log4j xml or property file? If you have, and I know, I have a lot of times, you maybe wanna have a look on WizardForge log4j online wizard.

And byt the way, WizardForge supports more than only log4j.

• dhcpd
• django
• lighthttpd
• …