Fedora 28 : Alien, Steam and Fedora distro.

Today I tried an incurs in converting deb files into packages rpm for Fedora 28.
As you well know, the alien utility is used to solve this problem.
The Debian package I tried to convert is the Steam gaming utility.

[mythcat@desk ~]$ su
Password: 
[root@desk mythcat]# dnf search alien
Last metadata expiration check: 0:02:59 ago on Mon 22 Oct 2018 08:15:33 PM EEST.
========================= Name Exactly Matched: alien ==========================
alien.noarch : Converter between the rpm, dpkg, stampede slp, and Slackware tgz
             : file formats
[root@desk mythcat]# dnf install alien.noarch 
Last metadata expiration check: 0:05:58 ago on Mon 22 Oct 2018 08:15:33 PM EEST.

...
Complete!

[root@desk mythcat]# cd Downloads/

[root@desk Downloads]# alien --scripts -r steam_latest.deb
steam-launcher-1.0.0.56-2.noarch.rpm generated

The next step is the install process:

[root@desk Downloads]# dnf install steam-launcher-1.0.0.56-2.noarch.rpm
Last metadata expiration check: 0:17:36 ago on Mon 22 Oct 2018 08:15:33 PM EEST.
Dependencies resolved.
================================================================================
 Package              Arch         Version             Repository          Size
================================================================================
Installing:
 steam-launcher       noarch       1.0.0.56-2          @commandline       2.8 M

Transaction Summary
================================================================================
Install  1 Package

Total size: 2.8 M
Installed size: 2.8 M
Is this ok [y/N]: y
Downloading Packages:
Running transaction check
Transaction check succeeded.
Running transaction test
Error: Transaction check error:
  file / from install of steam-launcher-1.0.0.56-2.noarch conflicts with file from package filesystem-3.8-2.fc28.x86_64
  file /lib from install of steam-launcher-1.0.0.56-2.noarch conflicts with file from package filesystem-3.8-2.fc28.x86_64
  file /usr/bin from install of steam-launcher-1.0.0.56-2.noarch conflicts with file from package filesystem-3.8-2.fc28.x86_64
  file /usr/lib from install of steam-launcher-1.0.0.56-2.noarch conflicts with file from package filesystem-3.8-2.fc28.x86_64

Error Summary
-------------

The problem comes from the conversion and I try to see I have the correct packages into my Fedora 28 distro.

[root@desk Downloads]# dnf search filesystem-3.8-2.fc28.x86_64
Last metadata expiration check: 0:19:14 ago on Mon 22 Oct 2018 08:15:33 PM EEST.
No matches found.
[root@desk Downloads]# dnf search filesystem
Last metadata expiration check: 0:20:17 ago on Mon 22 Oct 2018 08:15:33 PM EEST.
======================= Name Exactly Matched: filesystem =======================
filesystem.x86_64 : The basic directory layout for a Linux system
====================== Name & Summary Matched: filesystem ======================
[root@desk Downloads]# dnf install filesystem.x86_64
Last metadata expiration check: 0:22:13 ago on Mon 22 Oct 2018 08:15:33 PM EEST.
Package filesystem-3.8-2.fc28.x86_64 is already installed, skipping.
Dependencies resolved.
Nothing to do.
Complete!

I try again to see is something new , but I got the same error.

[root@desk Downloads]# dnf install steam-launcher-1.0.0.56-2.noarch.rpm

In conclusion: Fedora distro solves a number of shortcomings in the field of package management, but the efforts of the development team do not resolve to cover user requirements. However, the alien utility remains a very important step in the development process that should be updated and optimized to implement new software. I would add here my attempts to create Fedora packets with software that works normally on this distro (Blender 3D - version 2.8).
Let's hope that the Fedora development team will resolve these issues until the next version of this distro.

Fedora 28 : Fix XFS internal error XFS_WANT_CORRUPTED_GOTO .

It is a common kernel error created under certain predefined conditions.
...kernel: XFS internal error XFS_WANT_CORRUPTED_GOTO...

# xfs_repair -L /dev/mapper/fedora-root
# xfs_repair -L /dev/mapper/fedora-swap
# reboot

This will fix this error.

Fedora 28 : Testing Blender 2.80 .

I tested the new Blender 2.80 alpha 2 version and is working well.
You can start to download it from the official download page.
The next step: unarchive the tar.bz file and run the blender from the newly created folder.
I try to create a package but seems the tool not working with the .spec file.
This is a screenshot with this Blender 3D software running in my Fedora 28.

Fedora 28 : Strife another golang game framework.

Today I tested this 2D game framework named Strife.
You can read more about this from the official website.
The development team tells us:
  "This a work in progress. It provides a very minimal toolset for rendering shapes, images, and text as well as capturing user input."
This game framework uses SDL2 libraries.
Strife is open source and available under the MIT license.
Let's start with installation into Fedora 28 distro.

[root@desk mythcat]# dnf install SDL2-devel.x86_64
[root@desk mythcat]# dnf install SDL2_ttf-devel.x86_64 
[root@desk mythcat]# dnf install SDL2_image-devel.x86_64 
[mythcat@desk ~]$ go get github.com/felixangell/strife
[mythcat@desk ~]$ cd $GOPATH/src/github.com/felixangell/strife

I test one example from installation folder with particles:

[mythcat@desk strife]$ cd example/particles
[mythcat@desk particles]$ go run particles.go
2018/10/04 22:13:18 initializing window  1280 x 720
2018/10/04 22:13:18 dpi, default_dpi =  0 72
2018/10/04 22:13:21 Loading font  /usr/share/fonts/DejaVuSans.ttf
2018/10/04 22:13:21 Failed to load font at '/usr/share/fonts/DejaVuSans.ttf'
 ' try setting a font yourself with strife.LoadFont
resize to  1280 x 960
resize to  1280 x 960
resize to  1280 x 720
resize to  1280 x 720
closing window!

This is result of the running example:

Fedora 28 : Web development with Nikola and python.

The development team comes with this info about Nikola:
Nikola is a static site and blog generator, written in Python. It can use Mako and Jinja2 templates, and input in many popular markup formats, such as reStructuredText and Markdown — and can even turn Jupyter Notebooks into blog posts! It also supports image galleries and is multilingual. Nikola is flexible, and page builds are extremely fast, courtesy of do it (which is rebuilding only what has been changed).
I tested today with Fedora 28 and python version 2.7.15.
If you take a look at Nikola handbook, you will see all the features, options and settings you need for web development.
The installation is very simple:

[mythcat@desk ~]$ pip install Nikola --user
Collecting Nikola
...
Installing collected packages: Nikola
Successfully installed Nikola-7.8.15

[mythcat@desk ~]$ nikola init mysite
[2018-10-01T14:09:02Z] WARNING: Nikola: In order to USE_BUNDLES, you must install the "webassets" Python package.
[2018-10-01T14:09:02Z] WARNING: bundles: Setting USE_BUNDLES to False.
Creating Nikola Site
====================

This is Nikola v7.8.15.  We will now ask you a few easy questions about your new site.
If you do not want to answer and want to go with the defaults instead, simply restart with the `-q` parameter.
--- Questions about the site ---
Site title [My Nikola Site]: my_website
Site author [Nikola Tesla]: catafest
Site author's e-mail [n.tesla@example.com]: catafest@yahoo.com
Site description [This is a demo site for Nikola.]: website with Nikola static sit
Site URL [https://example.com/]: http://example.com
    The URL does not end in '/' -- adding it.
Enable pretty URLs (/page/ instead of /page.html) that don't need web server configuration? [Y/n] y
--- Questions about languages and locales ---
We will now ask you to provide the list of languages you want to use.
Please list all the desired languages, comma-separated, using ISO 639-1 codes.  
The first language will be used as the default.
Type '?' (a question mark, sans quotes) to list available languages.
Language(s) to use [en]: en

Please choose the correct time zone for your blog. Nikola uses the tz database.
You can find your time zone here:
https://en.wikipedia.org/wiki/List_of_tz_database_time_zones

Time zone [Europe/Bucharest]: 
    Current time in Europe/Bucharest: 17:12:36
Use this time zone? [Y/n] y
--- Questions about comments ---
You can configure comments now.  Type '?' (a question mark, sans quotes) to list available comment systems.  
If you do not want any comments, just leave the field blank.
Comment system: 

That's it, Nikola is now configured.  Make sure to edit conf.py to your liking.
If you are looking for themes and addons, check out https://themes.getnikola.com/ and https://plugins.getnikola.com/.
Have fun!
[2018-10-01T14:12:54Z] INFO: init: Created empty site at mysite.

Now you can build and start the server with this command:

[mythcat@desk ~]$ cd mysite/
[mythcat@desk mysite]$ ls
cache  conf.py  conf.pyc  files  galleries  listings  pages  posts
[mythcat@desk mysite]$ nikola build
[2018-10-01T14:14:51Z] WARNING: Nikola: In order to USE_BUNDLES, you must install the "webassets" Python package.
[2018-10-01T14:14:51Z] WARNING: bundles: Setting USE_BUNDLES to False.
Scanning posts........done!
.  render_posts:timeline_changes
...
[2018-10-01T14:14:52Z] WARNING: Nikola: Python 2 is old and busted. Python 3 is the new hotness.
[2018-10-01T14:14:52Z] WARNING: Nikola: Nikola is going to deprecate Python 2 support in 2017. You already have Python 3
available in your system. Why not switch?

Please check http://bit.ly/1FKEsiX for details.

.  sitemap:output/sitemap.xml
.  sitemap:output/sitemapindex.xml
.  robots_file:output/robots.txt
[mythcat@desk mysite]$ nikola serve -b 

Let's see the result of this running server:
To add a post just use this command:

[mythcat@desk mysite]$ nikola new_post
[2018-10-01T14:16:09Z] WARNING: Nikola: In order to USE_BUNDLES, you must install the "webassets" Python package.
[2018-10-01T14:16:09Z] WARNING: bundles: Setting USE_BUNDLES to False.
Creating New Post
-----------------

Title: New post
Scanning posts........done!
[2018-10-01T14:16:24Z] INFO: new_post: Your post's text is at: posts/new-post.rst

[mythcat@desk mysite]$ nikola build
[2018-10-01T14:16:34Z] WARNING: Nikola: In order to USE_BUNDLES, you must install the "webassets" Python package.
[2018-10-01T14:16:34Z] WARNING: bundles: Setting USE_BUNDLES to False.
Scanning posts........done!
.  render_posts:timeline_changes

The result will be this:

There are a few themes for Nikola available at the Themes Index.

[mythcat@desk mysite]$ nikola theme -l
[2018-10-01T14:21:20Z] WARNING: Nikola: In order to USE_BUNDLES, you must install the "webassets" Python package.
[2018-10-01T14:21:20Z] WARNING: bundles: Setting USE_BUNDLES to False.
Available Themes:
-----------------
blogtxt
bnw
bootblog
bootblog-jinja
bootstrap
bootstrap-jinja
bootstrap3-gradients
bootstrap3-gradients-jinja
cadair
canterville
carpet
detox
foundation6
hack
hemingway
hpstr
hyde
jidn
lanyon
libretto
lotabout
material-theme
maupassant
mdl
monospace
oldfashioned
planetoid
readable
reveal
reveal-jinja
slidemenu
srcco.de
yesplease
zen
zen-forkawesome
zen-ipython
zen-jinja

Fedora 28 : Integrate tinymce editor with Fedora and Django.

This is a raw tutorial about how to integrate the python module named django-tinymce with a Django project.
I used the raw word because you need to have a working Django project into your Fedora distro.
You can see my old tutorial about Django to see how to build a Django project.
About this python module, you can read more here.
The django-tinymce is a Django application that contains a widget to render a form field as a TinyMCE editor.
I have a project named trydjango with a Django application named products into my django folder.
I used activate command to activate my virtual environment:

[mythcat@desk django]$ source bin/activate

I install this python module named django-tinymce:

(django) [mythcat@desk django]$ pip install django-tinymce4-lite
Collecting django-tinymce4-lite
...
Installing collected packages: jsmin, django-tinymce4-lite
Successfully installed django-tinymce4-lite-1.7.2 jsmin-2.2.2

Let's see my folder project django named src:

(django) [mythcat@desk django]$ cd src/
(django) [mythcat@desk src]$ ll
total 136
-rw-r--r--. 1 mythcat mythcat 135168 Sep 28 12:21 db.sqlite3
-rwxrwxr-x. 1 mythcat mythcat    541 Sep 23 18:56 manage.py
drwxrwxr-x. 4 mythcat mythcat    142 Sep 26 21:45 pages
drwxrwxr-x. 4 mythcat mythcat    142 Sep 28 18:30 products
drwxrwxr-x. 3 mythcat mythcat    112 Sep 28 12:04 templates
drwxrwxr-x. 3 mythcat mythcat     93 Sep 28 12:14 trydjango

The installation is simple and star with to your settings.py and url.py file:

(django) [mythcat@desk src]$ cd trydjango/
(django) [mythcat@desk trydjango]$ vim settings.py 

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'products',
    'tinymce',
]
(django) [mythcat@desk trydjango]$ vim urls.py

from django.contrib import admin
from django.urls import path, include

from pages.views import home_view, about_view, contact_view
from products.views import product_detail_view

urlpatterns = [
    path('', home_view, name='home'),
    path('about/', about_view),
    path('contact/',contact_view),
    path('admin/',admin.site.urls),
    path('product/',product_detail_view),
    path(r'^tinymce/', include('tinymce.urls')),

This is my change I used to add the tinymce editor into my django application named products.

(django) [mythcat@desk products]$ vim models.py
from django.db import models
from tinymce.models import HTMLField

# Create your models here.
class Product(models.Model):
    title = models.CharField(max_length=120)
#    description = models.TextField(blank=True, null=True)
    description = HTMLField()
    price = models.DecimalField(decimal_places=2, max_digits=1000)
    summary = models.TextField(default='this is cool!')

You can see I used HTMLField and default come is TextField.
The result of this changes can see into the next output:

Fedora 28 : Show a video with Google Apps Script.

It's not a tutorial specific to Fedora's distribution, but many users of this are programmers or developers and its tutorial is very useful.
The tutorial is about how to display a video in a sidebar on a Google document.
I used Google Apps Script to do this.
You can see the tutorial here.
This is a screenshot with the output of this tutorial:

Fedora 28 : Add the Fedora logo to the Google document.

I've been able to progress with Google Apps Script.
The latest tutorial with number 008.
This tutorial is about adding a logo and creating an add-on to a document in google drive.
See the full tutorial here, and result of this addon:

Fedora 28 : Start a service daemon with Python.

In this tutorial I will starting one service using systemctl , python and systemd. First, you need to create a file named testpython.service .

[mythcat@desk system]# cd /etc/systemd/system/
[root@desk system]# vim testpython.service

This file is a configuration file for this service.

[Unit]
Description=Python Service
After=multi-user.target
[Service]
Type=simple
ExecStart=/usr/bin/python /home/mythcat/test_service.py
[Install]
WantedBy=multi-user.target

Create the python file for this service. I named test_service.py .

[root@desk system]# exit
exit
[mythcat@desk system]$ cd ~
[mythcat@desk ~]$ vim test_service.py

#!/usr/bin/env python

import logging
import time

logging.basicConfig(level="INFO")

while True:
    logging.info("Hi")
    time.sleep(3)

Change permissions file for this python file and testpython.service, see:

[mythcat@desk ~]$ chmod 764 test_service.py

Because you run this service with systemd then selinux will send you error, fix that:

[mythcat@desk ~]$ chcon -t bin_t ~/test_service.py

Reload all services and start your service with this commands:

[root@desk system]# systemctl daemon-reload
[root@desk system]# systemctl start  testpython.service
[root@desk system]# systemctl status  testpython.service
● testpython.service - Python Service
   Loaded: loaded (/etc/systemd/system/testpython.service; enabled; vendor>
   Active: active (running) since Sat 2018-09-22 21:36:23 EEST; 5s ago
 Main PID: 7213 (python)
    Tasks: 1 (limit: 2102)
   Memory: 5.7M
   CGroup: /system.slice/testpython.service
           └─7213 /usr/bin/python /home/mythcat/test_service.py

Sep 22 21:36:23 desk systemd[1]: Started Python Service.
Sep 22 21:36:24 desk python[7213]: INFO:root:Hi
Sep 22 21:36:27 desk python[7213]: INFO:root:Hi

You can use the journalctl command to see the output of this service:

[root@desk system]# journalctl -u testpython.service 
-- Logs begin at Sat 2018-09-22 20:40:06 EEST, end at Sat 2018-09-22 21:31:07 EEST. --
Sep 22 20:40:06 desk python[6232]: INFO:root:Hi
Sep 22 20:40:09 desk python[6232]: INFO:root:Hi
Sep 22 20:40:12 desk python[6232]: INFO:root:Hi
Sep 22 20:40:15 desk python[6232]: INFO:root:Hi
Sep 22 20:40:18 desk python[6232]: INFO:root:Hi
Sep 22 20:40:21 desk python[6232]: INFO:root:Hi
Sep 22 20:40:24 desk python[6232]: INFO:root:Hi
Sep 22 20:40:27 desk python[6232]: INFO:root:Hi
Sep 22 20:40:30 desk python[6232]: INFO:root:Hi

Let's see the result:

Fedora 28 : Using AdonisJs web framework.

AdonisJs is a Node.js web framework with a breath of fresh air and drizzle of elegant syntax on top of it.
We prefer developer joy and stability over anything else.
I tested today this web framework named AdonisJs with Fedora 28.
The main goal was to use MySQL with MariaDB from Fedora 28 distro.
Let's start with the installation of AdonisJs on Fedora 28:

[root@desk mythcat]# npm i --global @adonisjs/cli
/usr/bin/adonis -> /usr/lib/node_modules/@adonisjs/cli/index.js
...
+ @adonisjs/cli@4.0.7
added 406 packages from 182 contributors in 33.533s

Go to the default user:

[root@desk mythcat]# exit
exit

Create the application , I named myapp:

[mythcat@desk ~]$ adonis new myapp
    _       _             _         _     
   / \   __| | ___  _ __ (_)___    | |___ 
  / _ \ / _` |/ _ \| '_ \| / __|_  | / __|
 / ___ \ (_| | (_) | | | | \__ \ |_| \__ \
/_/   \_\__,_|\___/|_| |_|_|___/\___/|___/

  [1/6] 🔬  Requirements matched [node & npm]
  [2/6] 🔦  Ensuring project directory is clean [myapp]
  [3/6] 📥  Cloned [adonisjs/adonis-fullstack-app]
  [4/6] 📦  Dependencies installed
  [5/6] 📖  Environment variables copied [.env]
  [6/6] 🔑  Key generated [adonis key:generate]

🚀   Successfully created project
👉   Get started with the following commands

Let's test the default myapp with this commands:

$ cd myapp
$ adonis serve --dev

[mythcat@desk ~]$ cd myapp
[mythcat@desk myapp]$ adonis serve --dev

 SERVER STARTED 
> Watching files for changes...

2018-09-16T09:47:46.799Z - info: serving app on http://127.0.0.1:3333

This is the result of the running myapp on 127.0.0.1:3333 web address:
Let's see the folders and files from AdonisJS:

[mythcat@desk myapp]$ ls
ace  config    node_modules  package-lock.json  README.md  server.js
app  database  package.json  public             resources  start

The configuration for web files can be seen here:

[mythcat@desk myapp]$ vim  start/routes.js 
'use strict'

/*
|--------------------------------------------------------------------------
| Routes
|--------------------------------------------------------------------------
|
| Http routes are entry points to your web application. You can create
| routes for different URL's and bind Controller actions to them.
|
| A complete guide on routing is available here.
| http://adonisjs.com/docs/4.1/routing
|
*/

/** @type {import('@adonisjs/framework/src/Route/Manager'} */
const Route = use('Route')

Route.on('/').render('welcome')
~                                                                               

This is telling Adonis that when the root of the site is loaded, render a template/view called welcome.
That welcome template can be found in /resources/views/welcome.edge.

[mythcat@desk myapp]$ cd resources/
[mythcat@desk resources]$ ll
total 0
drwxrwxr-x. 2 mythcat mythcat 26 Sep 16 12:46 views
[mythcat@desk resources]$ cd views/
[mythcat@desk views]$ ll
total 4
-rw-rw-r--. 1 mythcat mythcat 339 Sep 16 12:46 welcome.edge

Let's see the source code of this default webpage:

[mythcat@desk views]$ vim welcome.edge 
...

For example, if you change into start/routes.js from welcome to index then you need to rename the welcome.edge to index.edge .
About css files you can make changes into public/style.css :

[mythcat@desk myapp]$ cd public/
[mythcat@desk public]$ vim  style.css


@import url('https://fonts.googleapis.com/css?family=Montserrat:300');

html, body {
  height: 100%;
  width: 100%;
}

body {
  font-family: 'Montserrat', sans-serif;
  font-weight: 300;
  background-image: url("/splash.png");
  background-color: #220052;
}

* {
  margin: 0;
  padding: 0;
}
...

Using the mysql database is simple. Into Fedora 28 distro you can use mariadb, let's install it.

[mythcat@desk myapp]$ su
Password: 
[root@desk myapp]# dnf install mariadb mariadb-server
...
Complete!
[root@desk myapp]# systemctl start mariadb
[root@desk myapp]# systemctl status mariadb
● mariadb.service - MariaDB 10.2 database server
...

You need to make changes into .env file into your project folder.

[mythcat@desk myapp]$ vim .env
HOST=127.0.0.1
PORT=3333
NODE_ENV=development
APP_URL=http://${HOST}:${PORT}
CACHE_VIEWS=false
APP_KEY=xxxxxxxxxxxxxxxx
DB_CONNECTION=sqlite
DB_HOST=127.0.0.1
DB_PORT=3306
DB_USER=root
DB_PASSWORD=
DB_DATABASE=adonis
SESSION_DRIVER=cookie
HASH_DRIVER=bcrypt
~

Use this changes for mariadb:

DB_CONNECTION=mysql

Install into AdonisJs with this command:

[mythcat@desk myapp]$ adonis install mysql
  [1/1] 📦  Dependencies installed [mysql]

Use this mysql commands to create the database:

[mythcat@desk myapp]$ mysql -u root
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 18
Server version: 10.2.17-MariaDB MariaDB Server

Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]> create database adonis;
Query OK, 1 row affected (0.11 sec)

MariaDB [(none)]> exit;
Bye 

Let's test migration command for files to allow you to create and delete tables.

[mythcat@desk myapp]$ adonis migration:run
migrate: 1503248427885_user.js
migrate: 1503248427886_token.js
Database migrated successfully in 4.11 s
[mythcat@desk myapp]$ adonis make:migration jobs
> Choose an action undefined
✔ create  database/migrations/1537095058367_jobs_schema.js

Now that our database and tables have been created, I can create a model for handling jobs table and associated data.
The next tasks to follow depends by your website:

• Creating a Model 
• Creating a Controller 
• User Authentication

Fedora 28 : LibreOffice remote connection.

I wrote a tutorial about the remote connection in LibreOffice, see this article.
The main problem with LibreOffice development is the changes.
Now the feature Open remote is not working.
The bug is officially recognized and represented, see the page.
They inform us, see comment 31:
John R Mead 2017-12-17 22:43:03 UTC Well, it still doesn't work with LibreOffice Version: 6.0.0.0.beta1 (x64); I'm not providing screenshots this time since it's identical in everyway to my previous attempts. At the end of all the copy/pasting between LibreOffice and my browser to get all the relevant permissions, when I finally make the attempt to connect, I get the same message: The specified device is invalid. 

Current system configuration of potentially relevant software: 

Windows 10 Professional (x64) Version 1709 (build 16299.125) 
Java 9.0.1 
Microsoft - OneDrive version 17.25.1.0 (x64) 
LibreOffice Version: 6.0.0.0.beta1 (x64)

It's a common practice to see open-source software with bugs, most bugs are already available to users to avoid problems.
Most backup bugs are authentication and changes in development.