In this post we will run Django application behind a NGINX webserver, which is a very common practice in production.

An easy way to start an Elasticsearch server with Kibana (Elasticsearch frontend) instance!

In the last post I covered starting a new Django project with Docker, and how to build a custom container image for my project, but what I haven’t covered is how to use a Database and how persist your data since all data stored in the container ephemeral and would only exist during the life span of the container.

Docker is an interesting technology, although still young it gained a lot of buzz and momentum.

The last couple of weeks I started playing with Docker to see how can I use it for Django project development and deployment.

Here I document minimal steps to setup a CentOS 7 machine, it suppose to be a live post, so I’ll keep updating it every time I found a step worth mentioning!

Update: It turns out that this setup is not needed, you should a have single GOPATH directory with all of your projects inside it, and use the vendor feature to handle each project dependencies. More details in a new post. When working with Go language you must setup the GOPATH environment variable, but soon you will face two problems: Each project should have its own Go dependencies and its own Git code repo, so putting your source under GOPATH would be problematic.

Test sudo yum groupinstall "Development Tools" sudo yum install epel-release.noarch sudo yum install yum-utils rpmdevtools mkdir -p ~/rpmbuild/{SOURCES,SPECS} wget http://example.com/lame-3.99.5.tar.gz mv lame-3.99.5.tar.gz ~/rpmbuild/SOURCES rpmdev-newspec lame mv lame.spec ~/rpmbuild/SPECS cat < < EOF > ~/rpmbuild/SPECS/lame.spec # ------------------------------------------------------------ Name: lame Version: 3.99.5 Release: 1%{?dist} Summary: LAME MP3 Encoder License: N/A Source0: lame-3.99.5.tar.gz %description Educational tool to be used for learning about MP3 encoding. LAME aims to be the basis of a patent free audio compression codec.

My presentation at Riyadh Linux User Group about Ansible

I want to allow host-2 to copy a file securely from host-1, so the easiest way is to use “scp” command which use “ssh” as a transport to copy the file. If you want to do it manually it is straight forward “scp” invocation: host-2$ scp host-1:data.csv . But if you want to automate it you have to use “ssh” keys, but this means leaving a private ssh key on host-2 that can access host-1 without any restriction, i.

“sar” is a Unix command that collect, report, or save system activity information, it is different from other system status command like “top” or “vmstat” that only show real time status only, “sar” in the other hand collect these data so you can find the system state at any time.

This is a draft on configuring Munin to monitor services on a Linux machine, still dirty but published for my reference, if you have question let me know.

If you have a long running job that leaks few bytes of memory it will eventually will consume all of your memory with time.

Fail2ban is a program that scan your log files for any malicious behavior, and automatically block the offending IP.

PgBouncer is a lightweight connection pooler for PostgreSQL, connection pooling makes Postgres connection much faster, which is important in Web applications.

These are the step I perform after installing new Ubuntu machine.

Setting up a Postgres replaication

During this Eid vacation I spent many hours working on AgentX implementation in Python.

You can find the project in GitHub:

(https://github.com/rayed/pyagentx)

When I started producing backup worthy files (code, documents, projects, etc …), I realised the importance of backups after losing important files which happens to everybody. So I started my journey with backup solutions. Backup generation 1: My first backup was simple directory copy operation, I copied my important directories to external floppy (then CD), and since it is manual operation I always forget about it and my backups was always old.

Just type: sudo update-alternatives --config editor

I am trying new way to fix the annoying “cannot change locale (UTF-8)” error, this error usually show when you login from your OSX to a Linux machine:

So you managed to login to your Ubuntu Linux machine with a password by using the magic of ssh keys, and you installed “apticron” to email you whenever their is a system update, you login to the system and issue the update command “sudo aptitude update” and “sudo” asks you about your password! not only it is annoying, it also can’t be automated, imaging you manage 10 servers and you have to type the password to update each machine!

The following is a sample Makefile for simple project, here I am building a simple “Bloom Filter” library, and “main” program to use it. The library will have the following files: hash.h and hash.c bloom.h and bloom.c and we should get “libbloom.a” out of it. The “main” program will use: main.c bloom.h libbloom.a and we should get “main” executable. So our make file should look like this:

My notes on installing and configuring PostgreSQL on Ubuntu Linux.

PostgreSQL is used by many large web sites and services, including Skype, Reddit, Instagram, “.org” registerer, check longer list here Prominent Users

Best of all it isn’t owned by anyone, not Oracle nor anyone else!

bash completion extends bash’s standard completion behavior to achieve complex command lines with just a few keystrokes. This project was conceived to produce programmable completion routines for the most common Linux/UNIX commands, reducing the amount of typing sysadmins and programmers need to do on a daily basis. Just install: sudo aptitude install bash-completion

Getting IPv6 connectivity to your server isn’t very hard in fact if you have a decent provier you might already have it configured. Do you have IPv6 already configured? First try this command $ ifconfig -a You will have result like this: eth0 Link encap:Ethernet HWaddr 00:1e:0b:d6:7b:b8 inet addr:88.85.245.43 Bcast:88.85.245.47 Mask:255.255.255.248 inet6 addr: fe80::21e:bff:fed6:7bb8/64 Scope:Link : he-ipv6 Link encap:IPv6-in-IPv4 inet6 addr: 2001:470:1f08:1160::2/64 Scope:Global inet6 addr: fe80::5855:f52b/64 Scope:Link :

This guide for my own reference please don’t rely on it, for a better introduction check out Git Reference website. Basic concept and terminologies, Git have 3 logical places: Working Area: normal directory where you edit your project. Staging Area: Think of the staging as your project state before you start your coding session, after each coding session you add your changes to staging area using git add filename or git add .

Lately I migrated all of my server to Ubuntu server, what I really loved about it the easy of updating the system, all I need to is: $ sudo aptitude update # to update packages meta data $ sudo aptitude safe-upgrade # to perform the actual upgrade But sometimes on of the package information meta data files get corrupted, and I will get this error: $ sudo aptitude update

I compiled a quick and dirty list of smart phone and netbook OS, the list included the OS that I think are relevant. I merged both smart phone and netbooks OSes in the same category, because it seems they can be used on both platforms. Please let me know if you want to include any data worth adding. Open Chrome OS Started: 2009 Company: Google OS Base: Linux Browser: Webkit based (it is Chrome!

FLOSS weekly (FLOSS = Free Libre Open Source Software) interview with Linus Torvalds, straight questions and honest and simple answers, I love it. http://twit.tv/floss88 (56 minutes)

The new Linux.com relaunched under the management of Linux Foundation.

Slashdot: Qt, the highly polished, well documented, modern GUI toolkit owned by Nokia will be available under the LGPL starting with version 4.5! … [Nokia] want to encourage and stimulate the use of Qt Everywhere. This is fantastic news for all commercial developers looking to create cross-platform applications … Wikipedia: Qt is most notably used in KDE, Opera, Google Earth, Skype, Qtopia, Adobe Photoshop Album, VirtualBox and OPIE.

It is a bit of old news but thought I would share in case you missed it. Basically Wikipedia is switching 400 server from Redhat and Fedora mix to Ubuntu server. Check the details in ComputerWorld article

تحديث فبراير ٢٠٢٢ : بعد تغيير سياسة Centos في التحديث، قررت التحويل الى ديبيان توزيعة ديبيان خفيفة ورشيقة مقارنة باوبنتو، ومجانية وتحديثاتها آمنة تحديث ١٢ اكتوبر ٢٠١٨: حولت بالكامل لسينوتس CentOS متوافق مع رد هات لكن مجاني. تحديث ٢٩ اغسطس ٢٠١٣: حاليا الخيار بالنسبة لي اوضح كثيرا، فهو ينحصر في اوبنتو Ubuntu خصوصا نسخة الخادمات، او سينتوس CentOS اذا احتجت توافقية مع RedHat. الموضوع الاصلي من اهم نقاط الضعف في نظام لينكس هي تعدد التوزيعات، مما يخلق حيرة في اختيار التوزيعة المناسبة حتى لدى خبرء يونكس، فعلى الرغم من اني مدمن انظمة يونكس منذ اكثر من عشر سنوات الا اني لا ازال احتار عند العمل مع لينكس، وهذه احد اهم الاسباب التي تجعلني افضل نظام فري بي اس دي (FreeBSD)، حيث لا يوجد سوى نظام تشغيل واحد فقط لا غير، واذا بحثت عن حل مشكلة في فري بي اس دي ستعرف انها سوف تعمل لانه لا يوجد سوى نظام واحد اسمه قري بي اس دي.

أكاديمية الفيصل العالمية تتحالف مع “رد هات” لتقديم دورات واختبارت “رد هات” لينكس، خبر جداً مفرح لسببين: سهولة التدريب على لينكس ارتفاع الطلب على انظمة لينكس في السوق السعودي الرجاء التعليق على الخبر اذا كان يهمك 🙂 http://www.alriyadh.com/2008/05/10/article341420.html تحديث: موقع الاكاديمية على الانترنت: اكاديمية الفيصل: رد هات

PuTTY Tray is an improved version of PuTTY. It features some cosmetic changes, and a number of addons to make it more useful and much more fun to use. The features that I really like: Minimizing to the system tray Portability: optionally stores session configuration in files (for example: on a USB drive) like portaPuTTY Reconnects when your PC wakes up from stand-by / Attempts to reconnect when the connection fails http://www.

Nice article about Linux kernel development, the most interesting to me is the section “Why Companies Support Kernel Development”: The list of companies participating in Linux kernel development includes many of the most successful technology firms in existence. None of these companies are supporting Linux development as an act of charity; in each case, these companies find that improving the kernel helps them to be more competitive in their markets.