Fedora 28 : The LibreCAD application.

LibreCAD - originally CADuntu is a free Open Source CAD application and today I tested with my Fedora 28.
The content for this application is available under Creative Commons Attribution Share Alike. LibreCAD is a free and open-source and can be downloaded from official webpage.
Let's see the install process of this tool:

[root@desk mythcat]# dnf install librecad.x86_64
Last metadata expiration check: 3:00:39 ago on Fri 11 May 2018 07:51:19 PM EEST.
Dependencies resolved.
================================================================================
 Package                  Arch          Version             Repository     Size
================================================================================
Installing:
 librecad                 x86_64        2.1.0-7.fc28        fedora        2.3 M
Installing dependencies:
 libdxfrw                 x86_64        0.6.3-8.fc28        fedora        438 k
 librecad-fonts           noarch        2.1.0-7.fc28        fedora         11 M
 librecad-langs           noarch        2.1.0-7.fc28        fedora        603 k
 librecad-parts           noarch        2.1.0-7.fc28        fedora        903 k
 librecad-patterns        noarch        2.1.0-7.fc28        fedora        217 k
 shapelib                 x86_64        1.4.1-2.fc28        fedora         80 k

Transaction Summary
================================================================================
Install  7 Packages

Total download size: 15 M
Installed size: 109 M
Is this ok [y/N]: y
Downloading Packages:
(1/7): libdxfrw-0.6.3-8.fc28.x86_64.rpm         658 kB/s | 438 kB     00:00    
(2/7): librecad-langs-2.1.0-7.fc28.noarch.rpm   1.4 MB/s | 603 kB     00:00    
(3/7): librecad-2.1.0-7.fc28.x86_64.rpm         1.5 MB/s | 2.3 MB     00:01    
(4/7): librecad-parts-2.1.0-7.fc28.noarch.rpm   1.6 MB/s | 903 kB     00:00    
(5/7): shapelib-1.4.1-2.fc28.x86_64.rpm         1.3 MB/s |  80 kB     00:00    
(6/7): librecad-patterns-2.1.0-7.fc28.noarch.rp 1.3 MB/s | 217 kB     00:00    
(7/7): librecad-fonts-2.1.0-7.fc28.noarch.rpm   3.0 MB/s |  11 MB     00:03    
--------------------------------------------------------------------------------
Total                                           3.5 MB/s |  15 MB     00:04     
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
  Preparing        :                                                        1/1 
  Installing       : shapelib-1.4.1-2.fc28.x86_64                           1/7 
  Running scriptlet: shapelib-1.4.1-2.fc28.x86_64                           1/7 
  Installing       : librecad-patterns-2.1.0-7.fc28.noarch                  2/7 
  Installing       : librecad-parts-2.1.0-7.fc28.noarch                     3/7 
  Installing       : librecad-langs-2.1.0-7.fc28.noarch                     4/7 
  Installing       : librecad-fonts-2.1.0-7.fc28.noarch                     5/7 
  Installing       : libdxfrw-0.6.3-8.fc28.x86_64                           6/7 
  Running scriptlet: libdxfrw-0.6.3-8.fc28.x86_64                           6/7 
  Installing       : librecad-2.1.0-7.fc28.x86_64                           7/7 
  Running scriptlet: librecad-2.1.0-7.fc28.x86_64                           7/7 
  Verifying        : librecad-2.1.0-7.fc28.x86_64                           1/7 
  Verifying        : libdxfrw-0.6.3-8.fc28.x86_64                           2/7 
  Verifying        : librecad-fonts-2.1.0-7.fc28.noarch                     3/7 
  Verifying        : librecad-langs-2.1.0-7.fc28.noarch                     4/7 
  Verifying        : librecad-parts-2.1.0-7.fc28.noarch                     5/7 
  Verifying        : librecad-patterns-2.1.0-7.fc28.noarch                  6/7 
  Verifying        : shapelib-1.4.1-2.fc28.x86_64                           7/7 

Installed:
  librecad.x86_64 2.1.0-7.fc28          libdxfrw.x86_64 0.6.3-8.fc28            
  librecad-fonts.noarch 2.1.0-7.fc28    librecad-langs.noarch 2.1.0-7.fc28      
  librecad-parts.noarch 2.1.0-7.fc28    librecad-patterns.noarch 2.1.0-7.fc28   
  shapelib.x86_64 1.4.1-2.fc28         

Complete!

I start the application from command shell and this is the output I got.

[mythcat@desk ~]$ librecad 
RS_DEBUG::setLevel(3)
RS_DEBUG: Critical
RS_DEBUG: Errors
RS_DEBUG: Warnings
libpng warning: iCCP: known incorrect sRGB profile

The application works great I don't know from where come the errors.
You can used to test your skills into the area of
The official manual can be found here.
This is a screenshot from my Fedora 28 distro:

Fedora 28 : The Spin tool for 2D animation.

The spine is a 2D skeletal animation tool for your video games.
This tool comes with features to building great looking animations.
Spine exports animation data in its own, documented JSON and binary formats.
You can export animated GIFs, PNG or JPEG image sequences and AVI or QuickTime video.
I install the trial version into my Fedora 28 distro easy.
First, you need to download it and unarchive from the official website.
The next step will start with this command:

[mythcat@desk ~]$ cd SpineTrial/
[mythcat@desk SpineTrial]$ dir
examples  launcher  license.txt  runtimes  scripts  SpineTrial.sh
[mythcat@desk SpineTrial]$ sh SpineTrial.sh 
Spine Launcher 3.6.49 Trial
Linux amd64 4.16.6-302.fc28.x86_64
Java 1.7.0_80 Esoteric Software
64-bit Server VM
Downloading: Spine 3.7.16-beta Trial
Update complete.
Spine 3.7.16-beta Trial
Intel Open Source Technology Center
Mesa DRI Intel(R) Ivybridge Desktop 
3.0 Mesa 18.0.2
Resetting hotkeys (new version).
Using customized hotkeys.
Started.
May 10, 2018 6:54:08 PM java.util.prefs.FileSystemPreferences checkLockFile0ErrorCode
WARNING: Could not lock System prefs. Unix error code 0.
May 10, 2018 6:54:08 PM java.util.prefs.FileSystemPreferences syncWorld
WARNING: Couldn't flush system prefs: java.util.prefs.BackingStoreException: 

Couldn't get file lock.
May 10, 2018 6:54:38 PM java.util.prefs.FileSystemPreferences checkLockFile0ErrorCode
WARNING: Could not lock System prefs. Unix error code 0.
May 10, 2018 6:54:38 PM java.util.prefs.FileSystemPreferences syncWorld
WARNING: Couldn't flush system prefs: java.util.prefs.BackingStoreException: 

Couldn't get file lock

You can some warnings but the tool works great.
More about graphics and Linux design you can find articles on my website.
Look at these screenshots with Spine tool:

Fedora 28 : The OpenShot video editor.

This is a video editor for linux and many operating systems. I tested with Fedora 28 and works good. The install of this is very simple with dnf tool:

# dnf install openshot.noarch

The development team add many features into this software:
Feature list
Cross-platform video editing software (Linux, Mac, and Windows)
Support for many video, audio, and image formats
Powerful curve-based Key frame animations
Desktop integration (drag and drop support)
Unlimited tracks / layers
Clip resizing, scaling, trimming, snapping, rotation, and cutting
Video transitions with real-time previews
Compositing, image overlays, watermarks
Title templates, title creation, sub-titles
3D animated titles (and effects)
Advanced Timeline (including Drag & drop, scrolling, panning, zooming, and snapping)
Frame accuracy (step through each frame of video)
Time-mapping and speed changes on clips (slow/fast, forward/backward, etc...)
Audio mixing and editing
Digital video effects, including brightness, gamma, hue, greyscale, chroma key (bluescreen / greenscreen) , and many more!
The license for this software is this:
License OpenShot™ is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This is a screenshot on my Fedora distro.

Fedora 28 : GoLang first example .

This tutorial is about GoLang IDE . About this IDE you can read more here - my intro article about this IDE.
I try to used with the platform-native GUI library for Go named andlabs/ui.
First, after you install the IDE you can check the settings on menu Settings: Using this tool with Fedora 28 is easy.
About the first install of andlabs/ui then this come with this error:

[mythcat@desk ~]$ go get github.com/andlabs/ui
# pkg-config --cflags gtk+-3.0
Package gtk+-3.0 was not found in the pkg-config search path.
Perhaps you should add the directory containing `gtk+-3.0.pc'
to the PKG_CONFIG_PATH environment variable
Package 'gtk+-3.0', required by 'virtual:world', not found
pkg-config: exit status 1

That tell us is need to install some packages from Fedora repo:

# dnf install gtk3-devel

I used this source code to test the andlabs/ui:

package main

import (
   "github.com/andlabs/ui"
)

func main() {
   err := ui.Main(func() {
      input := ui.NewEntry()
      button := ui.NewButton("Greet")
      greeting := ui.NewLabel("")
      box := ui.NewVerticalBox()
      box.Append(ui.NewLabel("Enter your name:"), false)
      box.Append(input, false)
      box.Append(button, false)
      box.Append(greeting, false)
      window := ui.NewWindow("Hello", 200, 100, false)
      window.SetMargined(true)
      window.SetChild(box)
      button.OnClicked(func(*ui.Button) {
         greeting.SetText("Hello, " + input.Text() + "!")
      })
      window.OnClosing(func(*ui.Window) bool {
         ui.Quit()
         return true
      })
      window.Show()
   })
   if err != nil {
      panic(err)
   }
}

First time was run well and after I restart the IDE I got this error:

# gui_test
/usr/lib/golang/pkg/tool/linux_amd64/link: running gcc failed: exit status 1
gcc: error: /home/mythcat/go/src/github.com/andlabs/ui/libui_linux_amd64.a: No such file or directory

The problem come from GoLang IDE settings and andlabs/ui.
I remove and install again the andlabs/ui and now working well.
The result of this source code come with this output:

Fedora 28 : The VS Code on Fedora.

The Visual Studio Code is an editor for development and includes the features you need for highly productive source code editing.
You can use this editor with many Linux distros.
Today I tested with Fedora 28 distro version.

sudo rpm --import https://packages.microsoft.com/keys/microsoft.asc
sudo sh -c 'echo -e "[code]\nname=Visual Studio Code\nbaseurl=https://packages.microsoft.com/yumrepos/
vscode\nenabled=1\ngpgcheck=1\ngpgkey=https://packages.microsoft.com/keys/microsoft.asc" > /etc/yum.repos.d/vscode.repo'

Then use dnf to check and install this editor.

#dnf check-update
#dnf install code

Next step is to install extensions for Python, Golang, PHP, C# and more.

Fedora 28 : Golang by JetBrains .

This I.D.E. is a commercial and a free 30-day trial.
The price varies :

• € 199.00 /1st year
• € 159.00 /2nd year
• € 119.00 /3rd yr onwards

JetBrains s.r.o. is a software development company whose tools are targeted towards software developers and project managers. 
... 
JetBrains, creator of the leading Java IDE - IntelliJ IDEA - is a cutting-edge software vendor specializing in the creation of intelligent development tools.

The development team come with this infos about the Golang I.D.E. :
GoLand is a new commercial IDE by JetBrains aimed at providing an ergonomic environment for Go development.
... 
The new IDE extends the IntelliJ platform with the coding assistance and tool integrations specific for the Go language.

You can download it from here.
The tree command show install files:

[mythcat@desk bin]$ tree
.
├── format.sh
├── fsnotifier
├── fsnotifier64
├── fsnotifier-arm
├── goland64.vmoptions
├── goland.png
├── goland.sh
├── goland.vmoptions
├── idea.properties
├── inspect.sh
├── libyjpagent-linux64.so
├── libyjpagent-linux.so
├── log.xml
├── printenv.py
└── restart.py

0 directories, 15 files

Some screenshots with this  linux tool:

Fedora 27 : Fix your distro with systemctl .

This is a simple tutorial about systemctl tool and how to fix one simple error show by status. The help of this cmmand can be found with:

# man systemctl

Let's see how we can see this errors and how this working. First let's see the status for systemctl command (:

# systemctl status

The output is this:

    ● laptop
    State: degraded
     Jobs: 0 queued
   Failed: 1 units
    Since: Sun 2018-04-01 10:44:37 EEST; 58min ago
   CGroup: /
           ├─user.slice
           │ └─user-1000.slice
           │   ├─user@1000.service
           │   │ └─init.scope
           │   │   ├─929 /usr/lib/systemd/systemd --user
           │   │   └─931 (sd-pam)
           │   └─session-1.scope
           │     ├─ 748 login -- mythcat
           │     ├─ 936 -bash
           │     ├─ 982 sudo su
           │     ├─ 986 su
           │     ├─ 987 bash
           │     └─9879 systemctl status
           ├─init.scope
           │ └─1 /usr/lib/systemd/systemd --switched-root --system --deserialize 24
           └─system.slice
             ├─irqbalance.service
             │ └─655 /usr/sbin/irqbalance --foreground
             ├─lvm2-lvmetad.service
             │ └─578 /usr/sbin/lvmetad -f -t 3600
             ├─firewalld.service
             │ └─698 /usr/bin/python3 -Es /usr/sbin/firewalld --nofork --nopid
 ...

Detect the problem from list all failed units:

# systemctl list-units --state=failed

I find the rngd module is the problem. To fix this issue just use this commands:

# systemctl daemon-reload
# systemctl status rngd 
# systemctl stop rngd
# systemctl disable rngd
# systemctl enable rngd
# systemctl start rngd

The next step is reboot and check again if systemctl come with errors.

Testing the Fedora SOAS.

These are some of the most beautiful projects I appreciate and that's why I'm writing about them.
First is a Fedora Spin with the abbreviations SOAS from Sugar on a Stick.
This Fedora Spin is lightweight and made to run off of a flash drive, or a live CD.
Originally Red Hat and Pentagram developed SoaS as part of the One Laptop Per Child project.
About One Laptop Per Child project you can read here.
They tell us about this project at official web page:
Sugar on a Stick is a Fedora-based operating system featuring the award-winning Sugar Learning Platform and designed to fit on an ordinary USB thumbdrive ("stick").
Let's see some screenshots:

News: Yahoo hit QupZilla.

Like most, you already know as an XFCE environment installation comes with QupZilla web browser.
The QupZilla web browser is a lightweight multiplatform web browser written in Qt Framework and using its web rendering engine QtWebEngine.
If you using Fedora 28 you can get the Falkon web browser.
The Wikipedia tells us about Falkon browser "(formerly QupZilla[3]) is a free and open-source web browser, intended for general users. Falkon is licensed under GPLv3."
The Falkon browser working well with Yahoo.

About QupZilla web browser.

I used this web browser with Fedora 27 distro and then I tested with new Fedora 28.
Same problem from both distros with the Yahoo mail and the QupZilla web browser.
After authenticating when you access the mail button, a message that redirects us to use other browsers.
Is it okay or bad?
Most users would like to have no such issues.

Fedora 27 : Tips and tricks with hugo framework .

he most important fact in learning development is knowing the information flow and how to drain it knowing the elements and stages of information processing of the content.
That's why I wrote this article succinctly to show you how simple basics of exemplification can correctly complete and help the user to modify and create content.
I will show you how to follow steps into hugo framework and website development with hugo.
You need to read the basic of hugo terms from documentation if you want to learn all about hugo or take some helpful information.
First use --verbose flag gives extra information that will be helpful when we debug or build your hogo website.
You need to know your hugo version because is the old versions has bad issues, check it with:

$ hugo version

The next command is to see and debug your work:

$ hugo --verbose 

How hugo framework works when you start for the first time with hugo development.
Now, the first place that Hugo will look for rules and files is in the layouts/ directory so it will always find the skin.
If you start with hugo then you can change the default.
This files name skins are the files responsible for the look and feel of your site.
You have two ways to create a skin:

• create it in the layouts/ directory;
• create it in a sub-directory of the themes/ directory.

A skin in layouts/ folder can’t be customized without updating the templates and static files that it is built from.
The skin created in themes/ folder , can be and that makes it easier for other people to use it.
In my example tutorial , I add this text to themes/test_themes_001/layouts/index.html.
The result of running hugo server command will rput this text on your browser at 127.0.0.1:13131, see command:

$ hugo server --buildDrafts

The hugo command come with many features like :

• --buildDrafts this include content marked as draft ( see files with draft:true from .md file);
• --ignoreCache this ignores the cache directory if you use it;

Using --verbose let you to see your errors.
For example a bad template or configuration can come with this error:

 ...Unable to locate layout for "taxonomyTerm" ...

This show you what term created by you is not on your hugo development area.
I make just few changes to show you how the hugo working. First I create the website named hugo_website_001. I used hugo command to add some pages first_test.md and new.md and a theme named test_theme_001, see:

$ hugo new site hugo_website_001
$ cd hugo_website_001
$ hugo new theme test_theme_001
$ hugo new first_test.md
$ hugo new new.md
$ tree 
.
├── archetypes
│   └── default.md
├── config.toml
├── content
│   ├── first_test.md
│   └── new.md
├── data
├── fpaste_hugo.txt
├── layouts
├── public
│   ├── categories
│   │   └── index.xml
│   ├── css
│   ├── index.html
│   ├── index.xml
│   ├── js
│   ├── sitemap.xml
│   └── tags
│       └── index.xml
├── static
└── themes
    └── test_theme_001
        ├── archetypes
        │   └── default.md
        ├── layouts
        │   ├── 404.html
        │   ├── _default
        │   │   ├── list.html
        │   │   └── single.html
        │   ├── index.html
        │   ├── index.html.save
        │   └── partials
        │       ├── footer.html
        │       └── header.html
        ├── LICENSE.md
        ├── static
        │   ├── css
        │   └── js
        └── theme.toml

19 directories, 20 files
$ 

Let's see files for settings - the toml file type. First is the config.toml file:

baseURL = "http://localhost.com"
languageCode = "en-us"
title = "My New Hugo Site"
theme = "test_theme_001"
contentdir ="content"
publishdir = "public"

The next file is the theme.toml .

# theme.toml template for a Hugo theme
# See https://github.com/gohugoio/hugoThemes#themetoml for an example

name = "Test_theme_001"
license = "MIT"
licenselink = "https://github.com/yourname/yourtheme/blob/master/LICENSE.md"
description = "first theme with hugo"
homepage = "http://example.com/"
tags = ["tags","categories"]
features = []
min_version = "0.31"

[author]
  name = "catafest"
  homepage = "free-tutorials.org"

# If porting an existing theme
[original]
  name = ""
  homepage = ""
  repo = ""

I will show a minimal example to understand the changes you need to make to run well with hugo framework and the my custom theme.
I show next how this changes into files is show by hugo on browser.
The basic file load is the index.html from themes/test_theme_001/layouts folder with tag h2 and text Some text !, see:

Some text !

{{ partial "header.html" . }}
This file load another file from partials folder and is named header.html with tag p and this text:

This is a custom header

Let's run the hugo server :

hugo server --theme=test_theme_001 --buildDrafts --ignoreCache --disableFastRender

This is result is this:

Fedora 28 - first installation .

Today we tested the new version of Fedora 28 Beta.
I installed this version of the old Fedora 27 and I tried to use different environments (in this order): XFCE, LXDE and LXQT.
I have received some errors from the xorg service since the motherboard has an Intel graphics card.
I used a Hdmi 1 to DVI cable and that made me an area on the home screen without resizing correctly.
First, I'm not very happy with this dnf installation process for these environments.
However, Fedora 28 now works as much as possible.
I did not test and configure the kernel on the hardware machine.
Here's a screenshot with the new Fedora 28:

Fedora 27 : Testing the hugo web framework .

The development team come with this shot info: The world’s fastest framework for building websites.
I don't know if is the fastest framework but I'm sure is the fastest process to install and make settings using Fedora distro.
First you need to know this framework works with golang programming language.
Let's start testing this framework with the first step install the golang on the system.

$ sudo dnf install golang
$ mkdir -p $HOME/go
$ echo 'export GOPATH=$HOME/go' >> $HOME/.bashrc
$ source $HOME/.bashrc
$ go env GOPATH
/home/mythcat/go

Now you will have a go folder into home folder. Let's install the hugo framework.

$ cd  go
$ hugo new site hugo_website_001
$ cd hugo_website_001
$ tree

The result will the this:

The next step is the testing the hugo server with some commands:

$ hugo version
$ hugo --verbose
$ hugo server --verbose
$ hugo server

This will start the server and you can be see it at 127.0.0.1:1313. This is a bind address of the default hugo server and you need to set like any website. The file named config.toml in your site directory contains the global configuration for your Hugo site. This settings will make our website to run well. We can use one theme from a list of themes using git tool, see themes gohugo.io. If you get a theme named theme_001 you need to add it into config.toml file like:

theme = theme_001

The next step is to create some content and we can start with draft files. The draft file named first_test.md can be created with this command into hugo_website_001 folder. This will create the file into content folder.

$ hugo new first_test.md

The draf files can be render just if you use D option:

$ hugo server -D

If you don't have install or set a theme then you cannot see the draft or any content web pages. You can create a new theme (example: test_theme_001) and deal with this theme.

hugo new theme test_theme_001

If you use a theme from hugo then hugo is fastest framework, but if you need to create a new theme then for me is as fast as any framework.

Fedora 27 : The LibreOffice the 6.0.2 and 5.4.6.2 versions.

The LibreOffice suite is a good choice for most linux users.
If you try to download the rpm file from the official website you will get the 6.0.2 version of this suite.
The Fedora 27 come with 5.4.6.2 version for this software.
Every announcement by the Document Foundation with updates contains many bug fixes and improvements and this repairs prevent Libreoffice crashes.
Maybe the new Fedora 28 will come with the last version of the LibreOffice version.