Iceweasel 3, fix high CPU usage

type about:config, and change the browser.cache.memory.enable value to false

firefox 3 RC1 high cpu and memory usage

jQuery, check if element exists


if($('#some-div').length)){ /* exists */}


how to tell if an element exists

postgresql dblink query across database

postgresql dblink doc
using dblink to query other postgresql database and server

google apps spf records

type TXT
value

v=spf1 a mx include:aspmx.googlemail.com include:_spf.google.com ~all


google incorrect spf records
spf checker

ckeditor – how to make simple uploader work

edit the html page where you call the ckeditor instance.

CKEDITOR.replace('editor',
{
filebrowserUploadUrl:'/path/to/upload/script.php';
});

the line above will display the upload from whenever user click on the image icon.
the upload script should return

<script type="text/javascript">
window.parent.CKEDITOR.tools.callFunction(1, '<url of uploaded file>', '');</script>

ckeditor external file uploader
ckeditor image uploader problem

xfce4 enable restart and shut down for normal user


#apt-get install sudo
#visudo
add the following

your_username ALL=NOPASSWD:/usr/sbin/xfsm-shutdown-helper

enable restart and shutdown from xfce4

XUL is interesting

xul rendering gui with php
https://developer.mozilla.org/En/XUL
how to develop a firefox extension
getting started with xulrunner

multiseat system

very interesting article
http://wiki.x.org/wiki/Development/Documentation/Multiseat

debian multiset howto

how to save file into postgresql database

you need a column in a postgresql table with the type OID

create table files(
file_id serial primary key,
file oid not null
);
to insert file

INSERT INTO files(file) values(lo_import('/tmp/filename.ext');
to read the file

SELECT lo_export(file, '/tmp/filename.ext') WHERE file_id=2;
you can get the file in the /tmp/filename.ext.

store upload image postgresql

autologin with startx

edit /etc/inittab
comment out the line

#1:2345:respawn:/sbin/getty 38400 tty1
add the line

1:2345:respawn:/bin/login -f YOUR_USER_NAME tty1 /dev/tty1 2>&1

edit the .bash_profile and add

startx

autologin in debian