How to check whether name servers (NS) are propagated in Domain Name Server (DNS)?

Occasionally sysadmins/devops migrate their server to a new server with a new IP address due to server lag/ data loss, you name it. Here our domain name will point to the old IP address. It sometimes take a couple of days to fully get propagated.

There are some network tools like nslookup`/`dig that can help in checking DNS propagation. Let's say your name server (NS) is ns1. example.com:

nslookup - ns1-5-61-24-199.parsdev.net

At prompt type your domain and hit enter:

nillkin24.ir

If it resolves to what you expected then it works. It should give you something like:

Server:     ns1-5-61-24-199.parsdev.net
 Address:    5.61.24.199#53

NOTE: it may still take a while to propagate to the rest of the internet, that's out of your control.

Using dig:

dig @ns1-5-61-24-199.parsdev.net nillkin24.ir

It prints lots of information, you should see ANSWER SECTION with a result like below:

;; ANSWER SECTION:
 nillkin24.ir.       14400   IN  A   5.61.24.199

If you see the correct IP address, it means that it has properly cached by remote name servers.

#sysadmin #nslookup #dig #ns #dns #name_server

Analytics services for django projects:

https://github.com/jcassee/django-analytical

#django #analytics #django_analytical #github

You can integrate Django with Bootstrap4 now. First install it using pip:

pip install django-bootstrap4

Add to INSTALLED_APPS in your settings.py:

'bootstrap4',

In your templates, load the bootstrap4 library and use the bootstrap_* tags:

{% load bootstrap4 %}

 {# Display a form #}

 <form action="/url/to/submit/" method="post" class="form">
     {% csrf_token %}
     {% bootstrap_form form %}
     {% buttons %}
         <button type="submit" class="btn btn-primary">Submit</button>
     {% endbuttons %}
 </form>

* Reference: http://django-bootstrap4.readthedocs.io/en/latest/

#python #django #bootstrap #bootstrap4 #template django_bootstrap4

#fun #programmer_jokes

🔵 حریم نه چندان خصوصی؛ چرا باید وبکم لپ تاپ را بپوشانیم؟
#امنیت #آموزش
👇
http://dgto.ir/rl7

📱 @Digiato 📡

Axigen 10.1.5 Release Update

We are happy to announce the release of a new minor version, Axigen 10.1.5.
This version comes with number of small features, enhancements, performance improvements, and bug fixes, as well as support for openSUSE Leap 42.2 and 42.3.
For a detailed list of what's included in 10.1.5, please consult the list below.

More info: https://www.axigen.com/press/product-releases/axigen-1015-release-update_94.html

#mail #server #mail_server #axigen #update

Mixed Active Content is now blocked by default in Firefox 23!

What is Mixed Content?
When a user visits a page served over HTTP, their connection is open for eavesdropping and man-in-the-middle (MITM) attacks. When a user visits a page served over HTTPS, their connection with the web server is authenticated and encrypted with SSL and hence safeguarded from eavesdroppers and MITM attacks.

However, if an HTTPS page includes HTTP content, the HTTP portion can be read or modified by attackers, even though the main page is served over HTTPS. When an HTTPS page has HTTP content, we call that content “mixed”. The webpage that the user is visiting is only partially encrypted, since some of the content is retrieved unencrypted over HTTP. The Mixed Content Blocker blocks certain HTTP requests on HTTPS pages.

#http #https #mixed_active_content #firefox

Kafka® is used for building real-time data pipelines and streaming apps. It is horizontally scalable, fault-tolerant, wicked fast, and runs in production in thousands of companies.

#kafka

Django admin easy template:
https://github.com/ebertti/django-admin-easy

#python #django #template #admin_easy

#ebook #book #epub #microservice #micro_services

There various tools for a web-based project management applications, but the one which is fantastic is Trello with its ease of use and free of charge.
The similar version of Trello in Persian is Taskulu. It is also a great tool for project management.

I could not find a mobile version for Taskulu, but there are for Trello. Take a look at them both in the following links:

- https://taskulu.com
- https://trello.com

#project_management #task_management #trello #taskulu

sed linux command:

sed stands for Stream Editor. As its name advertise it works on stream of text (input file, input pipleline).
General command executation:

sed REGEX INPUTFILE

For instance if you want to replace hi with bye in hibye.txt file:

sed 's/hi/bye/' hibye.txt

It will print the result into standard output (console). If you want to put the output in a file:

sed 's/hi/bye/' hibye.txt > output.txt

Instead of INPUTFILE we can put - which then reads from standard input:

cat hibye.txt | sed 's/hi/bye/' -

Now if you want to put the output in a file:

cat hibye.txt | sed 's/hi/bye/' - > output.txt

As until now you have seen, sed command writes output to standard output, if you want to write the result to the file itself, use -i as below:

sed -i 's/hi/bye' hibye.txt

So in the above command the result will be written to hibye.txt itself.

#linux #sed #regex

#python #django #django_part11 #views #render

In this tutorial we would go over rendering templates by using shortcuts and using dynamic urls in views. We also complete the detail function to load question details from database.

#django_part11

جلسه ۵۰ گروه کاربران پایتون تهران، فردا پنجشنبه ۹ آذر ۱۳۹۶ از ساعت ۱۴:۳۰ تا ۱۶:۰۰ در «شتاب‌دهندهٔ آواتک» به نشانی «جاده مخصوص کرج، جنب متروی بیمه، خط کندرو، بین کوچه بیمه 2 و بیمه 3، پلاک 31، (محل سابق کارخانه الکترودسازی آما) کارخانه نوآوری، آواتک» برگزار خواهد شد.
شرکت در این رویداد برای کلیه علاقمندان، آزاد و رایگان است.
#python #tehpug #meetup

About the author
Susan Fowler is a site reliability engineer at Uber Technologies, where she splits her time between running a production-readiness initiative across all Uber microservices and embedding within business-critical teams to bring their services to a production-ready state. She worked on application platforms and infrastructure at several small startups before joining Uber.

Export all collection documents in MongoDB to a JSON file:

mongoexport --db YOUR_DATABASE --collection YOUR_COLLECTION_NAME --out YOUR_OUTPUT_FILE_NAME.json

NOTE: do not use this command for full database backup! Use mongodump instead

#mongodb #export #mongoexport #mongodump #collection #database

Install htop on CentOS from source:

htop is a real-time process viewer for Linux. First, install prerequisites and download the source:

yum groupinstall "Development Tools"
 yum install ncurses-devel
 wget http://hisham.hm/htop/releases/2.0.2/htop-2.0.2.tar.gz
 tar xvfvz htop-2.0.2.tar.gz
 cd htop-2.0.2/

Prepare for compilation:

./configure

By default, htop will be installed under /usr/local/bin. If you want to change installation location to something else (e.g., /usr/ bin`), run configure script with `--prefix option instead. For example:

./configure --prefix=/usr

build and install htop as follows:

make
 make install

Voila! You're done. just run it using:

htop

#linux #centos #htop #compile #source #install