knowledgebase of all things

Creating thumbnails from first page of a pdf

2007-01-19T12:07:00.000+01:00

Using imagemagick - convert:

convert "document.pdf[0]" -thumbnail 150x150 "firstpageofpdf.png"

Since convert uses gs (ghostscript) to process the pdf, remember that gs also needs to be in the php PATH. And of course, that the apache www-user has the correct folder permissions.

Amavisd Spamassassin status header on all messages

2006-12-08T11:27:00.000+01:00

Remember, the recipient domain has to be in local_domain_maps in amavisd.conf for the status header to appear.

Example:
@local_domains_maps = ( [ ".$mydomain", ".domain.no", "domain.no" ] );

MySQL backup

2006-11-16T10:44:00.000+01:00

mysqldump --all-databases --quick --single-transaction -u backup -p| gzip > mybackup.sql.gz

Change backup with user of your choice and type password at prompt. Or create a localhost-only backup user with read-all privileges.

amavisd-release

2006-09-22T10:06:00.000+02:00

To release a file from quarantine, use the amavisd-release program. I could not find this on my ubuntu machine where I installed amavisd-new with apt-get. So I copied the amavisd-release program from the original amavis package and put it in /usr/sbin/

Then I added to the 50-user file: (The newest ubuntu uses a conf.d/ for the amavisd-new settings files. Most others distros use amavisd.conf

$interface_policy{'SOCK'} = 'AM.PDP';
$policy_bank{'AM.PDP'} = {protocol=>'AM.PDP'};
$unix_socketname='/var/amavis/amavisd.sock';

I restarted amavis, and typed the following:

amavisd-release mail_id secret_id

and it WORKED!

I use mysql for quarantine storage, but this should work with regular file quarantine too.

Amazing.

Remove password from ssl server key

2006-09-20T11:44:00.000+02:00

# openssl rsa -in server.key.pass -out server.key
Enter pass phrase for server.key.pass:
writing RSA key

Delete all files older than 7 days

2006-03-23T10:42:00.000+01:00

This works in the Terminal app on Mac OS X Tiger 10.4.4:

find /path -mtime +7 -exec rm -rf {} ';'

Stuffit download page

2006-05-24T08:50:00.000+02:00

For easy access, so you don't need to fill in email address.

http://simsub.digitalriver.com/cgi-bin/stuffit-download

ecto!

2006-02-03T09:39:00.000+01:00

I've finally tried a blogger app for Mac. My choice fell on ecto, which seems to be so superior to the alternatives that it's worth to pay for. I haven't yet, have to check it out first, of course, but it looks highly promising. http://ecto.kung-foo.tv/

Computer: Linux: Tool: Filesplit

2005-06-21T13:08:00.000+02:00

Excellent tool for splitting large files.

Filesplit

Computer:hardware:RAID

2005-07-14T14:48:00.000+02:00

Here's a link to a good description with examples of the different RAID levels.
LaCie F800 Biggest disk

Computer: Convenient link

2005-06-23T16:24:00.000+02:00

If you do have to install the Real Player, here's a direct link that bypasses all the registration and hard-to-find download links:

http://www.real.com/freeplayer/?rppr=downloadcom1

Computer: Mac: OS X: Compile

2005-06-13T11:51:00.000+02:00

Found this to install libtiff on OS X. It's written for OS X Tiger 10.4.1 but also worked on 10.3.8.

Install libtiff on OS X

email to php script

2005-06-17T16:45:00.000+02:00

Want incoming mail to be sent to a php script for further parsing? Here's how, with postfix. This script shows you how to write the email to file, save to mySQL db, and also an auto-reply email.

1. Create an alias in /etc/postfix/aliases:
php: |/www/script.php

OR use a .forward file:
|/www/script.php

2. Create the file /www/script.php and make it executable with e.g. chmod 755

3. My source code for script.php

4. Try to send an email to the newly created user, in this case php.

Welcome!

2005-06-03T10:36:00.000+02:00

This is a place where I post tidbits of stuff that I've learned and researched, so I don't forget. There will be mostly compute-related stuff, but also other hints that pertains to activities outside the computer realm.