Linux: remove unwanted services from the system start-up

Default there are lots of services and programs which are starting to work while system start-up. It’s time to disable these unwanted.

Listening Network Ports

Two simple… but so useful commands for all kind of linux/unix servers administrators.

Update Ruby, Rails and gems

Few simply steps for updating Ruby, Rails and gems on your OS. I was doing it on Mac OS X, but it should works on UNIX-based systems as well.

Ruby on Rails: rake db:create → “Couldn’t create database for …

I try to set environment for my new Ruby on Rails + MySQL project. However when I am doing rake db:create I can see: “Couldn’t create database for …”

Apt-get package management in ubuntu

Everyone (each ubuntu user) knows how to install new package, search a package or remove one. However not everyone knows how to do something else.

Ruby on Rails: ‘require_frameworks’: no such file to load — net/https (RuntimeError)

I started to learn Ruby on Rails. First impression (based on screencasts and presentations) was very good. Next… I wanted to try it by myself. And first trouble… “initializer.rb:271:in `require_frameworks’: no such file to load — net/https (RuntimeError)”

Controlling Buffer Overflow Attacks by limiting settings in nginx

You have to limit few things in your nginx.conf: buffer size, body size and timeouts.

Linux server & security: SELinux

How to secure your server against burglary? By installing and turning on the right software. SELinux is one of these software.

“decoder jpeg not available” on Mac OS X

I have an error “decoder jpeg not available” while working on one of my python projects on Mac OS X. Why is that and how to fix it?

Publish post on Facebook Page wall as a Page (not a user) (python + Facebook REST API)

After long days (or even weeks) of fighting with this issue… today I can be proud of myself. At last… I did it and it works! I can publish new posts on Facebook Page wall as a Page, not as a user (admin of that page).