Programmer blog

Tmux is a handy terminal manager that allows you to switch between terminal sessions easily. Without losing history or windows upon ssh disconnects or similar. It is like screen , just better. (First of all because of using client-server based technology... ) Here is my minimal keyboard shortcuts guide that allows you to start using Tmux in a blink of an eye. Endless advanced commands and hotkey combinations you could always find by entering "man tmux" in a terminal. Tmux is installed quite easily in most of common linux based systems. Just type: Ubuntu: $ sudo apt - get install tmux CentOS: $ sudo yum install tmux This allows you to start using by starting it with $ tmux a | | tmux new This command first tries to attach to existing running tmux instance and creates new in case it is not found. Ctrl+b d - Will allow you to disconnect at any time. (This is also a way it is happening when you loose ssh session. How to connect - look earlier) Each sess...

rsync is a command for remote sync. It is used to synchronise one location to another in a simple way. Location is meant to be local directory, server or remote web server or whatever accessible by ssh. Advantages of using rsync over other tools is speed and bandwidth requirements. First time rsync copies entire contents of the directory provided and increments changes over next sync times. Command syntax: $ rsync options source destination 1. Synchronising local directories: $ rsync -zvr /tmp/logs/ /tmp/logs1/ building file list ... done created directory /tmp/ logs1 ./ log. log sent 98 bytes received 48 bytes 292.00 bytes/sec total size is 0 speedup is 0.00 $ Used rsync command options here: -z is for compression -v is for verbose output -r is for recursive directory scanning By default rsync does not preserve timestamps.  2. Preserve timestamps and permissions during sync: $ rsync -azvr /tmp/logs/ /tmp/...

One of main features and troubles for Django projects is the Django version you are using. Example for this would be the occasion of starting project for Django 1.4.x version. Trying to run it under Django 1.7.x would lead to various troubles, counting template changes, misconfiguration errors and so on. Solution is to use virtual environment. The tool for this is called Virtualenv . It is a wrapper for a python interpreter. It enables you to have multiple versions of python packages that run independently. The Virtualenv creates you a standalone environment. Basically it copies and keeps a system Python of yours in a specified directory. All the python packages will be installed there. (In case you have not forgot to activate it first, of course) Lets get started then. We need Virtualenv itself for the first. There are many ways to install it depending on your system . Most obvious to use pip. Your installation command will look something like that: pip install virtualenv Thi...

It often gets that you need it because you invent something that is meant to be displayed for admin. E.g. some nasty form field or something. Here is my recipe to add some additional Django static to your admin. Rather than writing a widget , that is more proper way here... I was using a widget already (from another package). So I could not use it properly, at least without a ton of overrides and complexity it leads to. SO I've decided to add the JS functionality to override a lack of backend. First of all we should add the javascript/css like so: # admin.py class MyModelAdmin (admin.ModelAdmin): # admin additions class Media : css = { "all" : ( "css/my_style.css" ,) } js = ( "js/my_script.js" ,) This add should list your files, loaded in the admin . So you can access them and see in the Django admin frontend itself. Like so: Now that your script and style are loaded you could jus...