Category Archives: Notes


Cuban Radio Stations

La cancion de la trova (link for media player)
Radio Campesina Cubana
Trova Radio (link for media player)


Blood Donation – Length of the Regeneration Phase


How long will it take for the body to replenish the pint of blood I donate?


«Your body will replace the blood volume (plasma) within 48 hours. It will take four to eight weeks for your body to completely replace the red blood cells you donated. The average adult has eight to 12 pints of blood. You will not notice any physical changes related to the pint you donated.» (Quelle:


Excel Formula for Discount Price Calculation


A1: Number of items
B1: Price per item
C1: Discount (percent)


WooCommerce – Renaming the «Place Order» Button


The translation of the button «Place order» doesn’t seem to work with the current version of WooCommerce (2.4.10). It’s simply ignored.

(Possible) Solution

1. In the file «payment-method.php» look for the following code:

data-order_button_text="<?php echo esc_attr( $gateway->order_button_text ); ?>"

2. Replace the code within the quotes with the desired text. Example:

data-order_button_text="Bestellung abschicken"


This procedure is a rather dirty solution. Especially because you have to redo it after every plugin update.


Linux Mint – Starting Arm

On Linux Mint, the following command lets you start Arm, the monitoring program for Tor.

sudo -u debian-tor arm

Maybe you have to adjust the username, «debian-tor» in this case.


Linux – Download an Entire Directory

On Linux, the following command lets you download an entire directory:

wget -r --no-parent http://ip-address-or-domain-name/directory-path/


Simple File Sharing on Linux Mint

1. Right-click the folder with the files you want to share.
2. Choose «Open in Terminal».
3. Enter the following command:
python -m SimpleHTTPServer

The files are now accessible under ip-address-of-the-computer:8000.


Edward Snowden T-shirts



POPFile Doesn’t Filter E-mails


POPFile doesn’t filter e-mails despite training. All e-mails remain in the bucket «unclassified».

(Possible) Solution

At least at the beginning all e-mails ending up in the bucket «unclassified» need to be manually reassigned to another bucket.


If you leave e. g. e-mails, which aren’t spam, in the bucket «unclassified» and you only reassign the spam to another bucket, the filter won’t work. Besides «unclassified», you always have to use at least two other buckets, e. g. «spam» and «no-spam». «Unclassified» serves only as transition bucket for e-mails, which need to be manually reassigned to another bucket.


Linux Mint – Completely Uninstall Programs

To completely uninstall programs and their configuration files from Linux Mint, you may use the following command.

apt-get --purge remove program

(Replace program with the name of the program resp. package.)