Ubuntu - resize window with alt-right click

To enable this functionality in ubuntu, install gconf-editor:

sudo apt-get install gconf-editor

run it, and navigate to apps/metacity/general and enable "resize_with_right_button"  key.

 

In Ubuntu 14.04

sudo apt-get install compizconfig-settings-manager

ccsm

Click Window Management and Resize Window.

Set the key to "<Alt>Button3"

 

For Linux Mint (version now: 17):

gsettings set org.cinnamon.desktop.wm.preferences resize-with-right-button true

 

Pip PIL error: Could not find any downloads that satisfy the requirement PIL

When installing "PIL" with pip, I got this error:

Downloading/unpacking PIL
Could not find any downloads that satisfy the requirement PIL

 Fix: use "Pillow" instead of "PIL". Make sure you uninstall PIL first.

pip uninstall PIL
pip install Pillow

 

Slow SSH login on Ubuntu

I have recently experienced a slow ssh login issue on ubuntu 13.10 (xubuntu actually).
Tried all kind of solutions from internet, nothing worked, except this:

Edit the following file:

sudo nano /etc/nsswitch.conf

Find the following line:

hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4


replace with

hosts: files dns

Voilà!

Ssh authentication working like a charm!

Compare integer variable in django templates

Ever needed to compare some variable (that may come from db, forms, etc) in django templates with an integer?
Example:

{% if some_var == 3 %}
    working
{% endif %}

The above example will not work. Django's template engine interprets the variable as a string.

Workaround for integer comparison:

{% if some_var|add:0 == 3 %}
    working
{% endif %}

By using the "add" filter, the variable is transformed into an integer.