Fedora 42 : Can be better? part 020.

I wrote in some posts about this blog about the possibility of improving the distribution of Linux Fedora.

Today I discovered that choosing GNOME is a better option with lighting modes and options for the Nemo file manager actions.

I would have wanted to have a better network system similar to portmanager with S.P.N. for fedora users and team on web.

SPN (Secure Peer Name) is a technology related to secure communication protocols, particularly in the context of peer-to-peer networks and distributed systems.

I want to have more tools and applications on tty with GUI, like ncurses... I created an radio online application with ncurses and you can find it on my pagure.

The main goal of these type of graphic user interface is simplicity, no need hardware resources - this HP Compaq 6710b has only 4Gb RAM, and cand be used with Single Board Computer.

I think Fedora don't have a Fedora Spin for Single Board Computer hardware.

Let's start with python 3 action on nemo file manager.

Go to the action folder and create an action file named: python3.nemo_action.

[root@fedora mythcat]# cd /usr/share/nemo/actions
[root@fedora actions]# nano python3.nemo_action

Add this source code :

[Nemo Action]
Name=Execute Python Script
Icon-Name=python
Exec=env /usr/bin/python3 %F
Selection=S
Name[tr]=Python script         
Extensions=py;

Reopen the Nemo file manager and you see an an Execute Python Script, only on the python script on right click menu.

Let's see some screenshots:

Fedora 42 : ... testing Advanced Intrusion Detection Environment (AIDE).

Advanced Intrusion Detection Environment (AIDE) is a utility that creates a database of files on the system, and then uses that database to ensure file integrity and detect system intrusions.. See more on the official fedora documentation webpage.

NOTE : The documentation and translations on the official page are in progress due to ongoing development and resource management ...

I used the DNF tool to install:

[mythcat@fedora ~]$ sudo dnf install aide
... aide      x86_64      0.18.6-5.fc41        rawhide      

Make sure the AIDE database file exists and is accessible:

[mythcat@fedora ~]$ sudo ls -l /var/lib/aide/aide.db.gz

Ensure that the user running AIDE has the necessary permissions:

[mythcat@fedora ~]$ sudo ls -l /var/lib/aide/

Check the AIDE configuration file:

[mythcat@fedora ~]$ sudo cat /etc/aide.conf | grep DBDIR

Check if the AIDE service file exists:

[mythcat@fedora ~]$ sudo ls /usr/lib/systemd/system/ | grep aide

If the service exists then check the status:

[mythcat@fedora ~]$ sudo systemctl status aide
Unit aide.service could not be found.

If the service not exist then take some time to run first time ...

[mythcat@fedora ~]$ sudo /sbin/aide --init
...
End timestamp: 2024-10-26 14:10:00 +0300 (run time: 98m 41s)

You can check each time you want ...

[mythcat@fedora ~]$ sudo /sbin/aide --check

If you want and your Fedora linux need to use this tool, then you can use it like service:

sudo nano /usr/lib/systemd/system/aide.service

Fill with the basic service source code like any unit service :

[Unit]
   Description=Advanced Intrusion Detection Environment
   After=network.target

   [Service]
   Type=simple
   ExecStart=/sbin/aide --init
   ExecStop=/sbin/aide --check
   Restart=on-failure

   [Install]
   WantedBy=multi-user.target

This is a simple tutorial about how to start with AIDE tool ...

Fedora 42 : Still in the development without some features ...

An intrusion on my vodafone network , change my layout on windows.

Even the network provider say always is not from hardware or administration vodafone network ...

I tried to wrote a post on my graphics blogger on windows os , but I got something like this:

... ld ne frm 3 cmbire 224 ...

My nicknames comes like this: mhca caafe for mythcat and catafest ...

The tab and enter keys not works, also 1234 789 and num keys ... and more keys: s, t, w, y, o.

This post is wrote on Fedora 42 and works fine , but will be more good if this distro will have all features.

Some examples :

- Selinux still works but some enforced can change the default user permissions and privileges.

- Selinux works but you can use full features like : mls.

- the TPM device from this HP Laptop cannot be used with all features on Fedora.

In conclusion, this old laptop with Fedora and GNOME environment is more than 10 times faster human operations on the range of time, than the Asus laptop with the same 4GB RAM but with a different CPU Intel(R) Core(TM) i3-60060 @ 2.00 GHz 1.99 GHz and windows 10 pro.

Fedora 42 : Testing isoimagewriter.

Today I tested the isoimagewriter tool on Fedora 42 and works well:

[mythcat@fedora ~]$ sudo fdisk -l /dev/sdb
Disk /dev/sdb: 984 MiB, 1031798784 bytes, 2015232 sectors
Disk model: USB FLASH DRIVE 
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x00000000
[mythcat@fedora ~]$ isoimagewriter 
[mythcat@fedora ~]$ sudo file -s /dev/sdb
/dev/sdb: ISO 9660 CD-ROM filesystem data 'CorePure64' (bootable)
[mythcat@fedora ~]$ sudo qemu-system-x86_64 -cdrom /dev/sdb 

I used an linux iso image from CorePure64

Fedora 42 : Using dosbox to run old games in Fedora Linux distro.

You can run DOS games with the DOSBOX emulator ...

This can be install with DNF5 tool:

[root@fedora mythcat]# dnf5 install dosbox-staging.x86_64
Updating and loading repositories:
Repositories loaded.
Package                 Arch   Version                 Repository           Size
Installing:
 dosbox-staging         x86_64 0.81.2-3.fc42           updates-testing  14.6 MiB

The next step is to run the game ...

[mythcat@fedora ~]$ ls /usr/share/dunelegacy/
 ATRE.PAK                  DUNE.PAK       locale         SETUPENG.DIP
 CREDITS.ENG               ENGLISH.PAK    maps           Setup.EXE
 Dune2.BAT                 FINALE.PAK     MENTAT.PAK     SOUND.PAK
 Dune2.EXE                 GFXHD.PAK      MERC.PAK       VOC.PAK
 Dune2.ICO                 HARK.PAK       OneTime.DAT    Waveset.DAT
 Dune2-Versions.txt        HERC.PAK       OPENSD2.PAK    XTRE.PAK
 Dune.CFG                  INTRO.PAK      Options.CFG
'Dune II Icons.icl'        INTROVOC.PAK   ORDOS.PAK
'Dune II Unit Guide.txt'   LEGACY.PAK     SCENARIO.PAK
[mythcat@fedora ~]$ dosbox /usr/share/dunelegacy/Dune2.EXE 
date       time         | 
2024-10-16 11:39:03.508 | arguments: dosbox /usr/share/dunelegacy/Dune2.EXE
2024-10-16 11:39:03.509 | Current dir: /home/mythcat
2024-10-16 11:39:03.509 | stderr verbosity: 0
2024-10-16 11:39:03.509 | -----------------------------------

Fedora 42 : Dune Legacy game .

Dune Legacy is an effort by a handful of developers to revitalize the first-ever real-time strategy game.

It tries to be as similar as possible to the original gameplay but to integrate user interface features most modern realtime-strategy games have like selecting multiple units

I download this game from the official website, and I install with DNF5 tool:

[root@fedora Downloads]# dnf5 install dunelegacy-0.96.4.x86_64.rpm
Updating and loading repositories:
Repositories loaded.
Package                 Arch   Version                 Repository           Size
Installing:
 dunelegacy             x86_64 0.96.4-0.1              @commandline      5.8 MiB
Installing dependencies:
 SDL2_mixer             x86_64 2.8.0-2.fc41            updates-testing 345.3 KiB
 ...
 Warning: skipped PGP checks for 1 package from repository: @commandline
Complete!

Find the orifinal Dune II on web, or try this website.

The game can be start after I unarchive the DuneII archive into DuneII then copy to /usr/share/dunelegacy ...

[mythcat@fedora DuneII]$ sudo su 
[sudo] parola pentru mythcat: 
[root@fedora DuneII]# cp *.* /usr/share/dunelegacy
[root@fedora DuneII]# exit
exit
[mythcat@fedora DuneII]$ dunelegacy 

.. and works well :

Fedora 42 : The cvxpy python module ... part 001.

We are building a CVXPY community on Discord. Join the conversation! CVXPY is an open source Python-embedded modeling language for convex optimization problems. It lets you express your problem in a natural way that follows the math, rather than in the restrictive standard form required by solvers.

Today I install the cvxpy python module ...

You can see on the official website - www.cvxpy.org .

NOTE: I don't understand why the blogger don't have a a code tag , I used a div - pre - code into txt file to wrote my posts ...

[mythcat@fedora ~]$ nano tutoriale.txt 

Let's see ...

[mythcat@fedora home]# dnf5 upgrade
[mythcat@fedora home]# dnf5 install openblas-devel
[mythcat@fedora home]# dnf5 install blas-devel
...
$ ldconfig -p | grep openblas
$ ldconfig -p | grep blas
...
[mythcat@fedora home]$ pip install cvxpy
...
Successfully built cvxpy ecos scs qdldl
Installing collected packages: scipy, scs, qdldl, ecos, clarabel, osqp, cvxpy
Successfully installed clarabel-0.9.0 cvxpy-1.5.2 ecos-2.0.14 osqp-0.6.7.post3 qdldl-0.1.7.post4 scipy-1.14.1 scs-3.2.7

Fedora 42 : First test with red language - part 001.

Red is a next-generation programming language strongly inspired by Rebol, but with a broader field of usage thanks to its native-code compiler, from system programming to high-level scripting and cross-platform reactive GUI, while providing modern support for concurrency, all in a zero-install, zero-config, single ~1MB file!

I download and change to be executable:

[mythcat@fedora ~]$ cd red-lang/
[mythcat@fedora red-lang]$ ls
red-03oct24-920dd0452  red-toolchain-03oct24-920dd0452  red-view-03oct24-920dd0452
[mythcat@fedora red-lang]$ ls -l
total 4444
-rw-r--r--. 1 mythcat mythcat 1347348 Oct  4 23:56 red-03oct24-920dd0452
-rw-r--r--. 1 mythcat mythcat 1611781 Oct  4 23:55 red-toolchain-03oct24-920dd0452
-rw-r--r--. 1 mythcat mythcat 1589092 Oct  4 23:55 red-view-03oct24-920dd0452
[mythcat@fedora red-lang]$ chmod 760 red*
[mythcat@fedora red-lang]$ ls -l
total 4444
-rwxrw----. 1 mythcat mythcat 1347348 Oct  4 23:56 red-03oct24-920dd0452
-rwxrw----. 1 mythcat mythcat 1611781 Oct  4 23:55 red-toolchain-03oct24-920dd0452
-rwxrw----. 1 mythcat mythcat 1589092 Oct  4 23:55 red-view-03oct24-920dd0452

I check and install these supporting libraries:

sudo yum install glibc.i686
sudo yum install libcurl.i686
sudo yum install gtk3.i686

I start with the basic intro example from the official website.

Then I need to check the missing files with the DNF tool and install Fedora packages for each error on runtime with executable result

dnf provides \*/libgtk-3.so.0

The result is this:

Fedora 42 : Gnome intro ...

Today I tested the new GNOME environment and these are the screeenshot I get:

Look's good ..., see the tour idea ...

Fedora 42 : Fedora game project with pygame and agentpy - part 004.

... working on hacking game code , you can test two version of the unfinished game with agentpy at my pagure Fedora account.

* Hack the code based on minimal information versus total information. The code has 5 distinct letters. - click on the letters on the keypad - the number of guessed letters is displayed in the form: centered - guessed letters on positions and moved guessed letters but on other positions NOTE: the source code is under development, I need to enter a scroll to be able to enter more codes with letters

Fedora 42 : testing programming for ARM - part 001.

Today I tested the creation of a program that works on ARM processors and tested with QEMU emulator in Fedora 42.

I install with dnf5 these fedora packages:

[root@fedora mythcat]# dnf5 clean all
[root@fedora mythcat]# dnf5 install qemu-system-arm
[root@fedora mythcat]# dnf5 install arm-none-eabi-gcc gcc-arm-linux-gnu gcc-c++-arm-linux-gnu
[root@fedora mythcat]# dnf5 install arm-none-eabi-newlib.noarch 
...
[root@fedora mythcat]# dnf5 install binutils-devel

I create a new folder into may pagure account to test this issue with QEMU:

[mythcat@fedora mythcat]$ mkdir ARMProjects
[mythcat@fedora mythcat]$ cd ARMProjects/
[mythcat@fedora ARMProjects]$ qemu-system-arm --version
QEMU emulator version 9.1.0 (qemu-9.1.0-2.fc42)

I create a default assembly file for ARM named hello.s:

[mythcat@fedora ARMProjects]$ cat hello.s 
.global _start

_start:
    mov r0, #1     
    mov r7, #4     
    str r0, [r7]
    bx lr

Let's see how this means:

global _start: This declares the _start label as global, making it
 accessible from outside the file.
_start:: This marks the beginning of the program.
mov r0, #1: Moves the immediate value 1 into register R0.
mov r7, #4: Moves the immediate value 4 into register R7. This represents the system call number for write().
str r0, [r7]: Stores the contents of R0 (which contains 1) into the memory address pointed to by R7.
bx lr: Branches to the address in Link Register (LR). In this case, it loops indefinitely because there's no return instruction.

The compile of the file:

[mythcat@fedora ARMProjects]$ arm-none-eabi-gcc -nostartfiles -lc hello.s -o hello.o
[mythcat@fedora ARMProjects]$ ls
hello.o  hello.s

Let's see the hello.o file:

[mythcat@fedora ARMProjects]$ nm hello.o
00008000 t $a
00009010 T __bss_end__
00009010 T _bss_end__
00009010 T __bss_start
00009010 T __bss_start__
00009010 T __data_start
00009010 T _edata
00009010 T __end__
00009010 T _end
00080000 B _stack
00008000 T _start
[mythcat@fedora ARMProjects]$ objdump -f hello.o

hello.o:     file format elf32-little
architecture: UNKNOWN!, flags 0x00000112:
EXEC_P, HAS_SYMS, D_PAGED
start address 0x00008000

Fedora 42 : ima: Error Communicating to TPM chip ... cannot be fixed.

TPM stands for Trusted Platform Module. It's a hardware security chip designed to provide cryptographic capabilities and perform platform authentication.

I found this error and I tried to fix on my laptop HP 6710b:

[mythcat@fedora ~]$ sudo dmesg | grep Error
[    1.274790] tpm tpm0: [Hardware Error]: Adjusting reported timeouts: A 750->750000us B 2000->2000000us C 750->750000us D 750->750000us
[    2.240276] ima: Error Communicating to TPM chip
[    2.243913] ima: Error Communicating to TPM chip
[    2.246923] ima: Error Communicating to TPM chip
[    2.249919] ima: Error Communicating to TPM chip
[    2.253088] ima: Error Communicating to TPM chip
[    2.255923] ima: Error Communicating to TPM chip
[    2.258921] ima: Error Communicating to TPM chip
[    2.261938] ima: Error Communicating to TPM chip
[    2.415255] RAS: Correctable Errors collector initia

I update and nistall with the dnf5 tool

[root@fedora mythcat]# dnf5 upgrade 
...
[root@fedora mythcat]# dnf install tpm-tools
...

I reboot the Fedora and I try to test it:

[mythcat@fedora ~]$ ls /dev/tpm*
/dev/tpm0
[mythcat@fedora ~]$ lsmod | grep tpm
tpm_infineon           20480  0

To see all commands, use:

[mythcat@fedora ~]$ tpm_
tpm_changeownerauth  tpm_nvwrite          tpm_setclearable
tpm_clear            tpm_resetdalock      tpm_setenable
tpm_createek         tpm_restrictpubek    tpm_setoperatorauth
tpm_getpubek         tpm_restrictsrk      tpm_setownable
tpm_nvdefine         tpm_revokeek         tpm_setpresence
tpm_nvinfo           tpm_sealdata         tpm_takeownership
tpm_nvread           tpm_selftest         tpm_unsealdata
tpm_nvrelease        tpm_setactive        tpm_version

I install tcsd

[root@fedora mythcat]#  dnf install tcsd
...
[mythcat@fedora ~]$ sudo usermod -a -G tss $USER
[root@fedora mythcat]# systemctl daemon-reload
[root@fedora mythcat]# systemctl start tcsd
[root@fedora mythcat]#  systemctl status tcsd

I check the tpm version vith:

[mythcat@fedora ~]$ tpm_version
  TPM 1.2 Version Info:
  Chip Version:        1.2.1.2
  Spec Level:          2
  Errata Revision:     0
  TPM Vendor ID:       IFX
  TPM Version:         01010000
  Manufacturer Info:   49465800
[mythcat@fedora ~]$ sudo dnf5 search tpm2-tools
Updating and loading repositories:
Repositories loaded.
Matched fields: name (exact)
 tpm2-tools.x86_64: A bunch of TPM testing toolS build upon tpm2-tss
[mythcat@fedora ~]$ sudo dnf5 install tpm2-tools
...
Package "tpm2-tools-5.7-2.fc41.x86_64" is already installed.

The last error :

[mythcat@fedora ~]$ sudo tpm2_startup
ERROR:tcti:src/tss2-tcti/tcti-device.c:455:Tss2_Tcti_Device_Init() Failed to open specified TCTI device file /dev/tpmrm0: No such file or directory 
ERROR:tcti:src/tss2-tcti/tctildr-dl.c:149:tcti_from_file() Could not initialize TCTI file: libtss2-tcti-device.so.0 
ERROR:tcti:src/tss2-tcti/tcti-device.c:455:Tss2_Tcti_Device_Init() Failed to open specified TCTI device file /dev/tpm0: Device or resource busy 
ERROR:tcti:src/tss2-tcti/tctildr-dl.c:149:tcti_from_file() Could not initialize TCTI file: libtss2-tcti-device.so.0 
ERROR:tcti:src/tss2-tcti/tcti-device.c:455:Tss2_Tcti_Device_Init() Failed to open specified TCTI device file /dev/tcm0: No such file or directory 
ERROR:tcti:src/tss2-tcti/tctildr-dl.c:149:tcti_from_file() Could not initialize TCTI file: libtss2-tcti-device.so.0 
WARNING:tcti:src/util-io/io.c:262:socket_connect() Failed to connect to host 127.0.0.1, port 2321: errno 111: Connection refused 
ERROR:tcti:src/tss2-tcti/tcti-swtpm.c:617:Tss2_Tcti_Swtpm_Init() Cannot connect to swtpm TPM socket 
ERROR:tcti:src/tss2-tcti/tctildr-dl.c:149:tcti_from_file() Could not initialize TCTI file: libtss2-tcti-swtpm.so.0 
WARNING:tcti:src/util-io/io.c:262:socket_connect() Failed to connect to host 127.0.0.1, port 2321: errno 111: Connection refused 
ERROR:tcti:src/tss2-tcti/tctildr-dl.c:149:tcti_from_file() Could not initialize TCTI file: libtss2-tcti-mssim.so.0 
ERROR:tcti:src/tss2-tcti/tctildr-dl.c:263:tctildr_get_default() No standard TCTI could be loaded 
ERROR:tcti:src/tss2-tcti/tctildr.c:477:tctildr_init_context_data() Failed to instantiate TCTI 
ERROR: Could not load tcti, got: "(null)"

Fedora 42 : Fedora game project with pygame and agentpy - part 003.

I have upgraded the source code with the following changes:

• added agent with logic using the python agentpy module;
• I increased the grid to 16 x 16;
• I kept the win condition at 8 pieces aligned in any direction;
• I added conditions for displaying the equality message;

The game is hard to win, you can try on my pagure account.

Fedora 42 : Fedora game project with pygame and agentpy - part 002.

... and update from 8 in 8 with SVG file type.

The source code I used or you can find it on the pagure project:

import pygame
from pygame.math import Vector2
import random
import os 
username = os.getlogin()
# Initialize Pygame
pygame.init()
# Set up the display
width, height = 800, 800
screen = pygame.display.set_mode((width, height))
pygame.display.set_caption("Eight-in-a-Row")
# Font setup
font = pygame.font.Font(None, 74)
# Colors
WHITE = (255, 255, 255)
BLACK = (0, 0, 0)
BLUE = (0, 0, 120)
# Game board dimensions
BOARD_WIDTH = 8
BOARD_HEIGHT = 8

class Player:
    def __init__(self, color, is_computer=False):
        self.color = color
        self.pieces = set()
        self.is_computer = is_computer
        self.svg_image = self.load_svg_image()

    def add_piece(self, x, y):
        self.pieces.add((x, y))

    # def draw_pieces(self):
    #     for x, y in self.pieces:
    #         pygame.draw.circle(screen, self.color, 
    #                            (x * width // BOARD_WIDTH + width // (2 * BOARD_WIDTH), 
    #                             y * height // BOARD_HEIGHT + height // (2 * BOARD_HEIGHT)), 
    #                            min(width, height) // (2 * BOARD_WIDTH) - 5)
    
    def load_svg_image(self):
        if self.color == BLUE:
            svg_path = "penguin-svgrepo-com.svg"
        elif self.color == WHITE:
            svg_path = "cube-svgrepo-com.svg"
        else:
            svg_path = "cube-svgrepo-com.svg"
        return pygame.image.load(svg_path)

    def draw_pieces(self):
        piece_size = min(width, height) // (BOARD_WIDTH) - 10
        for x, y in self.pieces:
            pos = Vector2(x * width // BOARD_WIDTH + width // (2 * BOARD_WIDTH),
                          y * height // BOARD_HEIGHT + height // (2 * BOARD_HEIGHT))
            scaled_image = pygame.transform.scale(self.svg_image, (piece_size, piece_size))
            image_rect = scaled_image.get_rect(center=pos)
            screen.blit(scaled_image, image_rect)

    def make_move(self, board):
        if self.is_computer:
            empty_squares = [(x, y) for x in range(BOARD_WIDTH) for y in range(BOARD_HEIGHT) 
                             if (x, y) not in board[0] and (x, y) not in board[1]]
            if empty_squares:
                return random.choice(empty_squares)
        return None

def check_winner(player):
    directions = [(0, 1), (1, 0), (1, 1), (1, -1)]
    for x, y in player.pieces:
        for dx, dy in directions:
            if all((x + i*dx, y + i*dy) in player.pieces for i in range(8)):
                return True
    return False
    
def display_winner(winner):
    text = font.render(f"Player {winner} wins!", True, [145,190,190])
    text_rect = text.get_rect(center=(width // 2, height // 2))
    screen.blit(text, text_rect)
    pygame.display.flip()
    pygame.time.wait(3000)  # Display the message for 3 seconds

# Create players
player1 = Player(BLUE)
player2 = Player(WHITE, is_computer=True)
# Game loop
running = True
turn = 0
game_over = False

while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
        elif event.type == pygame.MOUSEBUTTONDOWN and not game_over:
            if turn % 2 == 0:  # Human player's turn
                mouse_x, mouse_y = event.pos
                column = mouse_x // (width // BOARD_WIDTH)
                row = mouse_y // (height // BOARD_HEIGHT)
                
                if (column, row) not in player1.pieces and (column, row) not in player2.pieces:
                    player1.add_piece(column, row)
                    
                    if check_winner(player1):
                        # print("Player 1 wins!")
                        display_winner(username)
                        game_over = True
                    
                    turn += 1

    if not game_over and turn % 2 == 1:  # Computer player's turn
        move = player2.make_move((player1.pieces, player2.pieces))
        if move:
            player2.add_piece(*move)
            
            if check_winner(player2):
                # print("Player 2 (Computer) wins!")
                display_winner("Computer")
                game_over = True
            turn += 1

    screen.fill(BLACK)
    
    # Draw game board
    for i in range(BOARD_WIDTH + 1):
        pygame.draw.line(screen, WHITE, (i * width // BOARD_WIDTH, 0), (i * width // BOARD_WIDTH, height), 2)
    for i in range(BOARD_HEIGHT + 1):
        pygame.draw.line(screen, WHITE, (0, i * height // BOARD_HEIGHT), (width, i * height // BOARD_HEIGHT), 2)

    # Draw pieces
    player1.draw_pieces()
    player2.draw_pieces()
    pygame.display.flip()

pygame.quit()

Fedora 42 : Fedora game project with pygame and agentpy - part 001.

I started a game project with the python packages pygame and agentpy in the Fedora 42 Linux distribution.

I used this version of Fedora:

[mythcat@fedora fedora_game]$ uname -a
Linux fedora 6.11.0-63.fc42.x86_64 #1 SMP PREEMPT_DYNAMIC Sun Sep 15 17:14:12 UTC 2024 x86_64 GNU/Linux

... and this python version:

Python 3.12.3 (main, Apr 17 2024, 00:00:00) [GCC 14.0.1 20240411 (Red Hat 14.0.1-0)] on linux

You can find it on my fedora pagure repo

News : I updated to Fedora 42 .

Few days ago, I updated the Fedora to version 42 on HP Compaq 6710b laptop.

Almost over four thousand Fedora packages have been instaled and reviewed ...

See the result :

$ uname -a
Linux fedora 6.11.0-0.rc7.20240910gitbc83b4d1f086.57.fc42.x86_64 #1 SMP PREEMPT_DYNAMIC Tue Sep 10 15:43:53 UTC 2024 x86_64 GNU/Linux

Fedora 41 : Install portmaster.

Portmaster is a free and open-source application firewall that does the heavy lifting for you. Restore privacy and take back control over all your computer's network activity.

First, download the RPM package from the official website.

Use the dnf5 tool and install it.

The last step is to open, after restart Fedora, see the result on my openbox environment:

Fedora 41 : solving conky default configuration in openbox environment.

I installed Conky on an openbox environment and found an error, it doesn't display upload and download from the network correctly.

I had to use the ifconfig command to see the network interface and then I had to modify the default file.

The default configuration file can be found and edited with any text editor:

[root@fedora mythcat]# nano /etc/conky/conky.conf

Here's how it looks functionally.

-- Conky, a system monitor https://github.com/brndnmtthws/conky
--
-- This configuration file is Lua code. You can write code in here, and it will
-- execute when Conky loads. You can use it to generate your own advanced
-- configurations.
--
-- Try this (remove the `--`):
--
--   print("Loading Conky config")
--
-- For more on Lua, see:
-- https://www.lua.org/pil/contents.html

conky.config = {
    alignment = 'top_left',
    background = false,
    border_width = 1,
    cpu_avg_samples = 2,
    default_color = 'white',
    default_outline_color = 'white',
    default_shade_color = 'white',
    double_buffer = true,
    draw_borders = false,
    draw_graph_borders = true,
    draw_outline = false,
    draw_shades = false,
    extra_newline = false,
    font = 'DejaVu Sans Mono:size=12',
    gap_x = 60,
    gap_y = 60,
    minimum_height = 5,
    minimum_width = 5,
    net_avg_samples = 2,
    no_buffers = true,
    out_to_console = false,
    out_to_ncurses = false,
    out_to_stderr = false,
    out_to_x = true,
    own_window = true,
    own_window_class = 'Conky',
    own_window_type = 'desktop',
    show_graph_range = false,
    show_graph_scale = false,
    stippled_borders = 0,
    update_interval = 1.0,
    uppercase = false,
    use_spacer = 'none',
    use_xft = true,
}

conky.text = [[
${color grey}Info:$color ${scroll 32 Conky $conky_version - $sysname $nodename $kernel $machine}
$hr
${color grey}Uptime:$color $uptime
${color grey}Frequency (in MHz):$color $freq
${color grey}Frequency (in GHz):$color $freq_g
${color grey}RAM Usage:$color $mem/$memmax - $memperc% ${membar 4}
${color grey}Swap Usage:$color $swap/$swapmax - $swapperc% ${swapbar 4}
${color grey}CPU Usage:$color $cpu% ${cpubar 4}
${color grey}Processes:$color $processes  ${color grey}Running:$color $running_processes
$hr
${color grey}File systems:
 / $color${fs_used /}/${fs_size /} ${fs_bar 6 /}
${color cyan}Networking:
${color grey}Up: ${upspeed ens1} ${color grey} - Down: ${downspeed ens1}

$hr
${color grey}Name              PID     CPU%   MEM%
${color lightgrey} ${top name 1} ${top pid 1} ${top cpu 1} ${top mem 1}
${color lightgrey} ${top name 2} ${top pid 2} ${top cpu 2} ${top mem 2}
${color lightgrey} ${top name 3} ${top pid 3} ${top cpu 3} ${top mem 3}
${color lightgrey} ${top name 4} ${top pid 4} ${top cpu 4} ${top mem 4}
]]

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 40 : Fedora CoreOS - part 001.

The documentation for Fedora 40 CoreOS can be found on the official webpage.

I download the fedora-coreos-40.20240331.1.0-virtualbox.x86_64.ova file.

You can use double click to open with the VirtualBox application, see the next screenshot:

Fedora use ssh keys and a user named core, use these steps from the official webpage to change the password for this user.

The result will be this:

You need to use these steps to create a password based on the butane and ignition software to login with the ssh-rsa.

Fedora 41 : Python and the Fedora Messaging Infrastructure - part 001.

Yesterday I tried to use Fedora Messaging.

You can find the documentation on the official page./div>

I created a working folder called FedoraMessaging:

[mythcat@fedora PythonProjects]$ mkdir FedoraMessaging
[mythcat@fedora PythonProjects]$ cd FedoraMessaging

You need to install the fedora-messaging and rabbitmq-server packages.

[root@fedora FedoraMessaging]# dnf5 install fedora-messaging
Updating and loading repositories:
Repositories loaded.
Package                             Arch    Version                       Repository         Size
Installing:                                                                                      
 fedora-messaging                   noarch  3.5.0-1.fc41                  rawhide        38.6 KiB
...
[root@fedora FedoraMessaging]# dnf install rabbitmq-server

At some point it will ask for a reboot.

You need to install the python package named fedora-messaging.

[root@fedora FedoraMessaging]# pip install --user fedora-messaging
Collecting fedora-messaging
...
Installing collected packages: pytz, incremental, wrapt, tomli, rpds-py, pyasn1, pika, hyperlink, constantly, attrs, 
referencing, pyasn1-modules, automat, twisted, jsonschema-specifications, service-identity, jsonschema, crochet, 
fedora-messaging
Successfully installed attrs-23.2.0 automat-22.10.0 constantly-23.10.4 crochet-2.1.1 fedora-messaging-3.5.0 
hyperlink-21.0.0 incremental-22.10.0 jsonschema-4.21.1 jsonschema-specifications-2023.12.1 pika-1.3.2 pyasn1-0.6.0 
pyasn1-modules-0.4.0 pytz-2024.1 referencing-0.34.0 rpds-py-0.18.0 service-identity-24.1.0 tomli-2.0.1 twisted-24.3.0 
wrapt-1.16.0

You need to start the broker:

[mythcat@fedora FedoraMessaging]$ sudo systemctl start rabbitmq-server

I used the source code from the documentation to test its functionality with a python script named hello_test.py.

from fedora_messaging import api, config

config.conf.setup_logging()
api.consume(lambda message: print(message))

from fedora_messaging import api, config

config.conf.setup_logging()
api.publish(api.Message(topic="hello by mythcat", body={"Hello": "world!"}))

I ran it and got this response:

[mythcat@fedora FedoraMessaging]$ python hello_test.py
[fedora_messaging.message INFO] Registering the 'base.message' key as the '<class 'fedora_messaging.message.Message'>' 
class in the Message class registry
[fedora_messaging.twisted.protocol INFO] Waiting for 0 consumer(s) to finish processing before halting
[fedora_messaging.twisted.protocol INFO] Finished canceling 0 consumers
[fedora_messaging.twisted.protocol INFO] Disconnect requested, but AMQP connection already gone

I created another python script named my_consumer.py, to check if this works:

from fedora_messaging import api, config
# Setup logging
config.conf.setup_logging()
# Define the callback function to process messages
def process_message(message):
    # Check if the message topic matches "hello by mythcat"
    if message.topic == "hello by mythcat":
        print(f"Received message: {message.body}")
    else:
        print(f"Ignoring message with topic: {message.topic}")
# Consume messages
api.consume(process_message)

I ran it and got this response:

[mythcat@fedora FedoraMessaging]$ python my_consumer.py
[fedora_messaging.twisted.protocol INFO] Successfully registered AMQP consumer Consumer(queue=amq.gen-9lKk7sGeYY5I40bdc5VrzQ,
callback=<function process_message at 0x7fdb0f5da160>)
[fedora_messaging.message INFO] Registering the 'base.message' key as the '<class 'fedora_messaging.message.Message'>'
class in the Message class registry
[fedora_messaging.twisted.consumer INFO] Consuming message from topic hello by mythcat 
(message id 800a1540-1e91-4b4a-a125-15e33eebb699)
Received message: {'Hello': 'world!'}
[fedora_messaging.twisted.consumer INFO] Successfully consumed message from topic hello by mythcat 
(message id 800a1540-1e91-4b4a-a125-15e33eebb699)

It can be seen that the answer is received and displayed correctly.

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 40 : Fix emergency run mode - part 001.

Run this commands to see errors and all failed systemd units:

[root@fedora mythcat]# dmesg | grep err
[root@fedora mythcat]# systemctl status --failed --all

If you get an error like this:

Recovery unable to mount /home

... check the /etc/fstab file to see how your home is set.

News : Fedora 40 Beta RC 1.10 compose ...

The Fedora Linux 40 Beta RC 1.10 compose is GO and will be shipped live on Tuesday, 26th March 2024.

This announcement was made on the devel-announce list by Aoife Moloney.

Aoife Moloney, the Fedora Operations Architect, has recently joined the Fedora community.

The Beta RC compose serves as a preliminary version of the upcoming Fedora release and allows Quality Engineering (QE) to thoroughly test the system and identify any critical issues before the final release.

You can find schedule for Fedora 40 on the official website.

News : Flutter on Fedora 40 - the run debug info.

The run command comes with info about the running process, see:

[mythcat@fedora examples]$ ../flutter/bin/flutter run
Launching lib/main.dart on Linux in debug mode...
Building Linux application...                                           
Syncing files to device Linux...                                 1,488ms

Flutter run key commands.
r Hot reload. 🔥🔥🔥
R Hot restart.
h List all available interactive commands.
d Detach (terminate "flutter run" but leave application running).
c Clear the screen
q Quit (terminate the application on the device).

A Dart VM Service on Linux is available at: http://127.0.0.1:38903/k8tmzU7n0NQ=/
The Flutter DevTools debugger and profiler on Linux is available at:
http://127.0.0.1:9100?uri=http://127.0.0.1:38903/k8tmzU7n0NQ=/

If you open that URL you will see this type of informations:

Fedora 40 : Spectacle tool.

Spectacle is a screenshot taking utility for the KDE desktop. Spectacle can also be used in non-KDE X11 desktop environments.

This is the GitHub project for this tool.

[root@fedora mythcat]# dnf5 install spectacle.x86_64
Updating and loading repositories:
Repositories loaded.
Package                       Arch   Version                 Repository      Size
Installing:                                                                      
 spectacle                    x86_64 24.02.0-1.fc41          updates-te   4.8 MiB
Installing dependencies:                                                         
...

This is an screenshot with this tool:

News : Introducing GNOME 46

Fedora 40 : sngrep tool.

The sngrep is a tool for displaying SIP calls message flows from terminal and supports live capture to display realtime SIP packets and can also be used as PCAP viewer.

[mythcat@fedora ~]# dnf copr enable irontec/sngrep
[mythcat@fedora ~]# dnf install sngrep
[mythcat@fedora ~]# exit
[mythcat@fedora ~]$ sudo sngrep  -d ens1 -O save.pcap port 8080 and udp

The result is this:

News : Flutter on Fedora 40.

Flutter transforms the development process. Build, test, and deploy beautiful mobile, web, desktop, and embedded experiences from a single codebase.

Read more on the official webpage.

Theoretically, Flutter can be used much easier in the Fedora 40 Linux distribution than in a Windows operating system.

The Windows installation method requires more complicated steps with the use of S.D.K. and settings of Android Studio I.D.E. .

Here are the steps you need to follow for a default installation.

[mythcat@fedora ~]$ mkdir ~/FlutterProjects
[mythcat@fedora ~]$ cd FlutterProjects/
[mythcat@fedora ~]$ wget https://storage.googleapis.com/flutter_infra_release/releases
/stable/linux/flutter_linux_3.3.10-stable.tar.xz
[mythcat@fedora ~]$ tar xf flutter_linux_3.3.10-stable.tar.xz
[mythcat@fedora ~]$
...

[mythcat@fedora FlutterProjects]$ ./flutter/bin/flutter doctor

┌─────────────────────────────────────────────────────────┐
│ A new version of Flutter is available!                  │
│                                                         │
│ To update to the latest version, run "flutter upgrade". │
└─────────────────────────────────────────────────────────┘
...

      If the Android SDK has been installed to a custom location, please use
      `flutter config --android-sdk` to update to that location.

[✗] Chrome - develop for the web (Cannot find Chrome executable at
    google-chrome)
    ! Cannot find Chrome. Try setting CHROME_EXECUTABLE to a Chrome executable.
[✓] Linux toolchain - develop for Linux desktop
[!] Android Studio (not installed)
[✓] VS Code (version 1.87.2)
[✓] Connected device (1 available)
[✓] HTTP Host Availability

! Doctor found issues in 3 categories.
[mythcat@fedora FlutterProjects]$ ./flutter/bin/flutter upgrade

...

    ! Cannot find Chrome. Try setting CHROME_EXECUTABLE to a Chrome executable.
[✓] Linux toolchain - develop for Linux desktop
[!] Android Studio (not installed)
[✓] VS Code (version 1.87.2)
[✓] Connected device (1 available)
[✓] Network resources

! Doctor found issues in 4 categories.

[mythcat@fedora FlutterProjects]$ ./flutter/bin/flutter config --enable-linux-desktop
Setting "enable-linux-desktop" value to "true".

You may need to restart any open editors for them to read new settings.

[mythcat@fedora FlutterProjects]$ mkdir examples
[mythcat@fedora FlutterProjects]$ cd examples/

[mythcat@fedora examples]$ ../flutter/bin/flutter create .
Creating project ....
Resolving dependencies... (5.1s)
Got dependencies.
Wrote 129 files.

All done!
You can find general documentation for Flutter at: https://docs.flutter.dev/
Detailed API documentation is available at: https://api.flutter.dev/
If you prefer video documentation, consider:
https://www.youtube.com/c/flutterdev

In order to run your application, type:

  $ cd .
  $ flutter run

Your application code is in ./lib/main.dart.

[mythcat@fedora examples]$ cd .
[mythcat@fedora examples]$ ls
analysis_options.yaml  ios    macos         README.md  windows
android                lib    pubspec.lock  test
examples.iml           linux  pubspec.yaml  web
[mythcat@fedora examples]$ ../flutter/bin/flutter run

The result is this simple default example:

News : SELinux wizzard tool !

I found today in Fedora linux this tool for SELinux with a GUI that allows creating linux security policies.

I will write a little about this system because it is a very good solution.

When I started studying selinux, it was not very well implemented and it seems that the interest of users to be protected is higher.

As you well know, the starting points are network security and data protection and kernel-level intrusions into software.

For those who don't know, SELinux is a system that allows limiting defined resources and allowing other actions or not.

I tested the tool and I can say that it solves only the standard file creation part without the possibility of selecting the SELinux bools variables.

If the one who created this tool will continue to be a very good tool.

It's currently a wizzard interface, I'd call it a Node Editor to allow the assembly of different processing blocks (nodes) into combinations that feed data to each other along connections you specify to produce complex effects.

After completing the steps in the wizard, you will have some default files.

I used the name firefox because the security of the browser is very low at the moment.

Here are some images of this tool:

News : ... about new about Google Analytics 4.

I found at Google.com analytics academy this message that urges us to go through the courses from the skillshop.exceedlms.com website.

It seems to pass this is quite important if they offered free courses:

These courses are about Universal Analytics. Starting July 1, 2023, standard UA properties will stop processing data (July 1, 2024 for UA 360 properties). Learn about Google Analytics 4, our next-generation measurement solution, with these free courses on Skillshop.

News : VirtualBox 7.0.14 released! from Oracle.

Oracle today released a 7.0 maintenance release which improves stability and fixes regressions. See the Changelog

I also use a version of Fedora running on VirtualBox for tests and rapid development.

Most use Linux on older hardware as a backup OS...

You can use Linux with specific non-default settings for good security of the operating system, but it does not make it invincible.

I don't know if VirtualBox solved the resize of the virtual partition - this was the last issue I encountered with this tool, but it is useful if you want to test something quickly.

Fedora 40 : Find version and GlibC flaw !

Because today I saw a video about the GlibC flaw that lets attackers get root on major distros, I will show an easy way to find the version of this lib with dnf and dnf5 tools:

[root@fedora var]# dnf in glibc
Last metadata expiration check: 0:04:06 ago on Wed 31 Jan 2024 10:25:13 PM EET.
Package glibc-2.38.9000-35.fc40.x86_64 is already installed.
Package glibc-2.38.9000-35.fc40.i686 is already installed.
Dependencies resolved.
Nothing to do.
Complete!
[root@fedora var]# dnf5 in glibc
Updating and loading repositories:
Repositories loaded.
Package "glibc-2.38.9000-35.fc40.x86_64" is already installed.
Package "glibc-2.38.9000-35.fc40.i686" is already installed.

You can see in the name is add the version: 2.38.9000-35.fc40.x86_64.

This is the video about GlibC from Bits inside by René Rebe.