Fedora 41 : python and Federated Message Bus in Fedora Linux Distro.

Federated Message Bus is a library built on ZeroMQ using the PyZMQ Python bindings. fedmsg aims to make it easy to connect services together using ZeroMQ publishers and subscribers.

You can use this python package named fedmsg to use this functionality ...

This is the source code :

import fedmsg
from fedmsg import *

import os
# Set the routing_nitpicky flag to True
os.environ['FEDMSG_ROUTING_NITPICKY'] = 'True'


config = fedmsg.config.load_config([],None)
config['mute'] = True
config['timeout'] = 0

for name, endpoint, topic, msg in fedmsg.tail_messages(**config):
    print ("name ", name)

This is the result :

[mythcat@fedora FedoraMessaging]$ python fedmsg_001.py
No routing policy defined for "org.fedoraproject.prod.copr.build.start" but routing_nitpicky is False so the message is being treated as authorized.
name  fedora-infrastructure
No routing policy defined for "org.fedoraproject.prod.copr.chroot.start" but routing_nitpicky is False so the message is being treated as authorized.
name  fedora-infrastructure
No routing policy defined for "org.fedoraproject.prod.github.check_run" but routing_nitpicky is False so the message is being treated as authorized.
name  fedora-infrastructure
No routing policy defined for "org.fedoraproject.prod.github.pull_request_review" but routing_nitpicky is False so the message is being treated as authorized.
name  fedora-infrastructure
No routing policy defined for "org.fedoraproject.prod.github.pull_request_review_comment" but routing_nitpicky is False so the message is being treated as authorized.
name  fedora-infrastructure ... 

Fedora 41 : Memstrack tool.

A runtime memory allocation tracer, like a hot spot analyzer for memory allocation, can help analyze overall memory usage, peak memory usage, kernel module memory usage, all combined with stacktrace. Userspace memory trace is planned and not yet implemented.

This tool works by tracing all page-level memory allocation events in kernel (currently supports using perf or ftrace), and actively integrate the events into a stack trace tree. It can also work with kernel's page owner log file and use as a memory usage viewer.

I tested this tool today and it is quite useful for development and monitoring the operating system, it seems to work very well, you can even see in the screenshot how ...

You can find this project on the GitHub repo.

Fedora 39 : ImHex editor.

ImHex is a Hex Editor, a tool to display, decode and analyze binary data to reverse engineer their format, extract informations or patch values in them.

Read more on the official webpage.

Let's install with dnf5 tool:

# dnf5 install imhex.x86_64
Updating and loading repositories:
Repositories loaded.
Package         Arch       Version         Repository                   Size
Upgrading:                
 cpp            x86_64     13.2.1-6.fc40   updates-testing          30.9 MiB
  replacing cpp                          x86_64     13.2.1-5.fc40   updates-testing          30.9 MiB
 gcc            x86_64     13.2.1-6.fc40   updates-testing          94.7 MiB
  replacing gcc                          x86_64     13.2.1-5.fc40   updates-testing          94.7 MiB
 gcc-c++        i686       13.2.1-6.fc40   updates-testing          34.7 MiB
  replacing gcc-c++                      i686       13.2.1-5.fc40   updates-testing          34.7 MiB
 gcc-c++        x86_64     13.2.1-6.fc40   updates-testing          33.9 MiB
  replacing gcc-c++                      x86_64     13.2.1-5.fc40   updates-testing          33.9 MiB
 gcc-plugin-annobin                      x86_64     13.2.1-6.fc40   updates-testing          57.0 KiB
  replacing gcc-plugin-annobin           x86_64     13.2.1-5.fc40   updates-testing          57.0 KiB
 glib2          x86_64     2.78.3-1.fc40   updates-testing          13.5 MiB
  replacing glib2                        x86_64     2.78.1-1.fc40   rawhide                  13.5 MiB
 glib2-devel    x86_64     2.78.3-1.fc40   updates-testing           3.7 MiB
  replacing glib2-devel                  x86_64     2.78.1-1.fc40   rawhide                   3.7 MiB
 libcurl        x86_64     8.5.0-1.fc40    updates-testing         784.6 KiB
  replacing libcurl                      x86_64     8.4.0-1.fc40    rawhide                 776.5 KiB
 libcurl-devel                           x86_64     8.5.0-1.fc40    updates-testing           1.4 MiB
  replacing libcurl-devel                x86_64     8.4.0-1.fc40    rawhide                   1.4 MiB
 libgcc         i686       13.2.1-6.fc40   updates-testing         253.4 KiB
  replacing libgcc                       i686       13.2.1-5.fc40   updates-testing         253.4 KiB
 libgcc         x86_64     13.2.1-6.fc40   updates-testing         230.3 KiB
  replacing libgcc                       x86_64     13.2.1-5.fc40   updates-testing         230.3 KiB
 libgomp        x86_64     13.2.1-6.fc40   updates-testing         485.7 KiB
  replacing libgomp                      x86_64     13.2.1-5.fc40   updates-testing         485.7 KiB
 libquadmath    x86_64     13.2.1-6.fc40   updates-testing         325.9 KiB
  replacing libquadmath                  x86_64     13.2.1-5.fc40   updates-testing         325.9 KiB
 libquadmath-devel                       x86_64     13.2.1-6.fc40   updates-testing          21.4 KiB
  replacing libquadmath-devel            x86_64     13.2.1-5.fc40   updates-testing          21.4 KiB
 libstdc++      x86_64     13.2.1-6.fc40   updates-testing           2.7 MiB
  replacing libstdc++                    x86_64     13.2.1-5.fc40   updates-testing           2.7 MiB
 libstdc++-devel                         x86_64     13.2.1-6.fc40   updates-testing          14.2 MiB
   replacing libstdc++-devel             x86_64     13.2.1-5.fc40   updates-testing          14.1 MiB
Installing:               
 imhex          x86_64     1.31.0-1.fc40   updates-testing          25.6 MiB
Installing dependencies:                           
 glfw           x86_64     1:3.3.8-4.fc39                           updates-testing         290.0 KiB
 nativefiledialog-extended               x86_64     1.1.1-1.fc40    updates-testing          40.8 KiB
 yara           x86_64     4.4.0-1.fc40    updates-testing         612.0 KiB
Installing weak dependencies:                      
 imhex-patterns                          x86_64     1.31.0-1.fc40   updates-testing           9.4 MiB

Transaction Summary:
 Installing:        5 packages
 Upgrading:        16 packages
 Replacing:        16 packages

Total size of inbound packages is 93 MiB. Need to download 93 MiB.
After this operation 36 MiB will be used (install 268 MiB, remove 232 MiB).
Is this ok [y/N]: y ...

I try on run on HP Compaq 6710b but not working:

[mythcat@fedora ~]$ imhex
[15:50:08] [INFO]  [main]       Welcome to ImHex 1.31.0!
[15:50:08] [INFO]  [main]       Compiled using commit Unknown@Unknown
[15:50:08] [INFO]  [main]       Running on Linux 6.7.0-0.rc3.20231129git18d46e76d7c2.30.fc40.x86_64 
#1 SMP PREEMPT_DYNAMIC Wed Nov 29 15:20:20 UTC 2023 (x86_64)
[15:50:09] [ERROR] [main]       GLFW Error [65543] : GLX: Failed to create context: GLXBadFBConfig
[15:50:09] [FATAL] [main]       Failed to create GLFW window: [65543] GLX: Failed to create context: GLXBadFBConfig.
You may not have a renderer available.
The most common cause of this is using a virtual machine
You may want to try a release artifact ending with 'NoGPU'

Fedora 39 : About Penpot online tool.

Designers and developers can finally work in unison to build beautifully designed software experiences that truly scale up.

Penpot is the Open-Source Design & Prototyping Tool for Product Teams.

If you have worked with Adobe XD or similar software, then it performs the same functions.

I haven't tested it very thoroughly, but I can tell you that it works very well and is open-source and free.

I haven't seen anything about Bootstrap in the library of bookstores and templates, but there are quite a few in other areas with a pretty good design.

You can test it on the official webpage.

See these videos from the official youtube channel:

Fedora 36 : Rootkit Hunter tool.

rkhunter (Rootkit Hunter) is a Unix-based tool that scans for rootkits, backdoors and possible local exploits. It does this by comparing SHA-1 hashes of important files with known good ones in online databases, searching for default directories (of rootkits), wrong permissions, hidden files, suspicious strings in kernel modules, and special tests for Linux and FreeBSD..., see wikipedia .

You can find it on this website.

On Fedora 36 you can search and install with the DNF tool.

[root@fedora mythcat]# dnf search rkhunter
Last metadata expiration check: 3:38:34 ago on Sat 06 Aug 2022 10:35:34 AM EEST.
======================== Name Exactly Matched: rkhunter ========================
rkhunter.noarch : A host-based tool to scan for rootkits, backdoors and local exploits
[root@fedora mythcat]# dnf install rkhunter.noarch
Last metadata expiration check: 3:39:00 ago on Sat 06 Aug 2022 10:35:34 AM EEST.

The first step is to upgrade it and then you can check the system.

[root@fedora mythcat]# rkhunter --propupd
[ Rootkit Hunter version 1.4.6 ]
File created: searched for 179 files, found 139

[root@fedora mythcat]# rkhunter --check
[ Rootkit Hunter version 1.4.6 ]

Checking system commands...

  Performing 'strings' command checks

...

The result can be found on the log file and you can set settings on the conf file type.

[root@fedora mythcat]# vi /var/log/rkhunter/rkhunter.log
[root@fedora mythcat]# vi /etc/rkhunter.conf

Fedora 36 : first steps with the Hy.

Hy is a dialect of the Lisp programming language designed to interact with Python by translating s-expressions into Python's abstract syntax tree (AST). Hy was introduced at Python Conference (PyCon) 2013 by Paul Tagliamonte.

This is quite similar to the old GIMP Script Fu that I've worked with in the past. The syntax assumes a join like tabs in HTML, only we'll use parentheses. I haven't studied in detail the implications it has with the python language, but it certainly wasn't invented for nothing.

First, you need to install it with the pip tool.

[mythcat@fedora ~]$ pip3 install hy --user
Collecting hy
...
Successfully built hy
Installing collected packages: funcparserlib, colorama, hy
Successfully installed colorama-0.4.5 funcparserlib-1.0.0 hy-0.24.0

The I test some examples:

[mythcat@fedora ~]$ hy
Hy 0.24.0 using CPython(main) 3.10.5 on Linux
=> (setv a 1)
=> "hello world"
"hello world"
=> (setv mylist [1 2 3])

=> (get mylist 0)
1
=> (defn greet [name]
...  "Hello "
...  (print "Hello " name))
=> (greet "mythcat")
Hello  mythcat

You can test it online with this online tool:

Fedora 36 : The zeek tool.

Zeek is a powerful network analysis framework that is much different from the typical IDS you may know.

Use the DNF tool to add repo for zeek tool:

[root@fedora home]# dnf config-manager --add-repo https://download.opensuse.org/repositories/security:zeek/Fedora_36/security:zeek.repo

Adding repo from: https://download.opensuse.org/repositories/security:zeek/Fedora_36/security:zeek.repo

Use DNF tool to install

[root@fedora home]# dnf install zeek-lts
The Zeek Network Security Monitor. (Fedora_36)   18 kB/s |  77 kB     00:04    
Last metadata expiration check: 0:00:02 ago on Sat 11 Jun 2022 12:33:29 AM EEST.
Dependencies resolved.
================================================================================
 Package                    Arch     Version              Repository       Size
================================================================================
Installing:
 zeek-lts                   x86_64   4.0.7-1.1            security_zeek   7.9 k
Installing dependencies:
 libbroker-lts-devel        x86_64   4.0.7-1.1            security_zeek   1.3 M
 libpcap-devel              x86_64   14:1.10.1-3.fc36     fedora          141 k
 python3-GitPython          noarch   3.1.26-1.fc36        fedora          275 k
 python3-gitdb              noarch   4.0.9-2.fc36         fedora          107 k
 python3-semantic_version   noarch   2.8.4-9.fc36         fedora           39 k
 python3-smmap              noarch   5.0.0-1.fc36         fedora           46 k
 zeek-lts-btest             x86_64   4.0.7-1.1            security_zeek   326 k
 zeek-lts-core              x86_64   4.0.7-1.1            security_zeek   4.8 M
 zeek-lts-devel             x86_64   4.0.7-1.1            security_zeek   957 k
 zeek-lts-libcaf-devel      x86_64   4.0.7-1.1            security_zeek   1.6 M
 zeek-lts-zkg               x86_64   4.0.7-1.1            security_zeek    50 k
 zeekctl-lts                x86_64   4.0.7-1.1            security_zeek   1.8 M

Transaction Summary
================================================================================
Install  13 Packages

Total download size: 11 M
Installed size: 57 M
Is this ok [y/N]:y
Downloading Packages:
(1/13): python3-gitdb-4.0.9-2.fc36.noarch.rpm   232 kB/s | 107 kB     00:00    


Complete!

Create a script file named main.zeek:

event zeek_init()
        {
        print "Hello, World!";
        }

event zeek_done()
        {
        print "Goodbye, World!";
        }

... and run this file:

[mythcat@fedora ~]$ /opt/zeek/bin/zeek main.zeek
Hello, World!
Goodbye, World!

Fedora 35 : Python and Flask-Mailing on Fedora.

First of all, a Merry Christmas to the users and the Fedora team. Python version 3.10.1 works very well on Fedore 35 and today I tested a packet called: Flask_Mailing.

Flask-Mailing adds SMTP mail sending to your Flask applications., see the Github repo.

Let's start with the installation of this packet with the pip utility.

[mythcat@fedora ~]$ pip install -U flask-mailing
Defaulting to user installation because normal site-packages is not writeable
Collecting flask-mailing
  Downloading Flask_Mailing-0.0.5-py3-none-any.whl (15 kB)
...
Installing collected packages: rfc3986, anyio, typing-extensions, httpcore, dnspython, async-timeout, pydantic, httpx, 
email-validator, blinker, asgiref, aiosmtplib, aioredis, flask-mailing
    Running setup.py install for blinker ... done
Successfully installed aioredis-2.0.0 aiosmtplib-1.1.6 anyio-3.4.0 asgiref-3.4.1 async-timeout-4.0.2 blinker-1.4 dnspython-2.1.0
email-validator-1.1.3 flask-mailing-0.0.5 httpcore-0.14.3 httpx-0.21.1 pydantic-1.8.2 rfc3986-1.5.0 typing-extensions-4.0.1

I create a folder named ExempleFlask001:

[mythcat@fedora ~]$ mkdir ExempleFlask001
[mythcat@fedora ~]$ cd ExempleFlask001/
[mythcat@fedora ExempleFlask001]$ vi flask001.py

I created the simplest example to test through the import procedure and then read with the dir function, here is the source code:

from flask import Flask
from flask_mailing import Mail, Message

app = Flask(__name__)
@app.route("/")
def index():
    test = str(dir(Mail))
    return test
if __name__ == "__main__":
    app.run(debug=True)

The result of running the script on the command line:

[mythcat@fedora ExempleFlask001]$ python flask001.py
 * Serving Flask app 'flask001' (lazy loading)
 * Environment: production
   WARNING: This is a development server. Do not use it in a production deployment.
   Use a production WSGI server instead.
 * Debug mode: on
 * Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)
 * Restarting with stat
 * Debugger is active!
 * Debugger PIN: 319-368-265
 ...

The browser's response to the script is this:

Fedora 35 : Share your commands online with asciinema tool on blogger.com .

The asciinema.org is now running the latest server and web player code and thus it fully supports this new format.

In the last tutorial about this online tool we briefly presented how it can be used.

In this tutorial, I will present some other features and how you can integrate the result in blogger.com.

Let's see a short example with some simple commands in Linux and how we used this tool:

[mythcat@fedora ~]$ asciinema auth
[mythcat@fedora ~]$ asciinema rec linux_commands_default.cast
asciinema: recording asciicast to linux_commands_default.cast
asciinema: press <ctrl-d> or type "exit" when you're done
[mythcat@fedora ~]$ ls
...
[mythcat@fedora ~]$ dir
...
[mythcat@fedora ~]$ pwd
...
[mythcat@fedora ~]$
exit
asciinema: recording finished
asciinema: asciicast saved to linux_commands_default.cast
[mythcat@fedora ~]$ asciinema upload linux_commands_default.cast

I used the local recording and uploaded it later to avoid additional fixes in case of errors and inconsistencies with what we want to display online.

The asciinema online tool supports sharing an asciicast on Twitter, Slack, Facebook, Google+, or any other site which supports one of these APIs: oEmbed, Open Graph, and Twitter Card APIs, see also this webpage.

To use this online tool with your blog, you will need to use the three lines of source code to change according to the number of asciinema uploaded from the URL.

In my example case is this number 455414 from this URL: https://asciinema.org/a/455414/ and the source code for this blog post is shown below:

<script src="https://github.com/asciinema/asciinema-player/releases/download/v2.6.1/asciinema-player.css"/></script>
<script src="https://github.com/asciinema/asciinema-player/releases/download/v2.6.1/asciinema-player.js"/></script>
<script id="asciicast-455414" src="https://asciinema.org/a/455414.js" async></script>

Here is the result of the source code above, it did not work now because I don't add javascript libraries on the script area.

Fedora 35 : You can test Fedora online.

You can test any Linux on this website.

I tested with Fedora 35 Linux distro and works well.

Just open the website select your Linux distro and press the Start button.

See the nest message on the webpage"

If no window has opened yet please click here: Open VNC-Viewer (allow POP-UPs !)

I used this option and I get the Linux distro for the first install.

I start it without install on the hard disk and this is the result: