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Not a ScarletBook disc!

Ou encore… Can’t read Master TOC

Si certains ISO semblent ne pas fonctionner avec sacd_extract-gui-winforms-dotnet.exe, c’est qu’elles ne sont pas compatibles avec sacd_extract.exe.

Si l’extraction avait été effectuée en ligne de commande on aurait obtenu le message d’erreur suivant:

libsacdread: Not a ScarletBook disc!
libsacdread: Can’t read Master TOC.

C’est par ce que l’ISO a été créé a partie d’une console PS modifier avec un blocksize 2064 et non 2048.
Il faut donc convertir l’image ISO à un blocksize 2048.

Télécharger WinCDEmu : http://wincdemu.sysprogs.org/

– faire un clic droit sur l’ISO puis sélectionner “choisir une lettre de lecteur & monter”
– ensuite clique droit sur le lecteur CD virtuel puis puis sélectionner “créer une image ISO”

Une fois l’opération terminée la table d’allocation aura été modifiée et la l’extraction pourras commencer.

Automatic Package Updates on CentOS 8

Security updates, are very important.

Under Linux it is always advisable to keep the installed packages up to date, especially when it comes to security.

This ensures that the system automatically downloads packages and performs updates without manual intervention.

The dnf-automatic is systemd units that can download package upgrades and apply them automatically.  The dnf-automatic provides three different systemd units to control the automatic update.

Below are three systemd units provided by dnf-automatic.

• dnf-automatic-download.timer for download only
• dnf-automatic-install.timer for download package updates and install
• dnf-automatic-notifyonly.timer will only notify via the omitter configuration

sudo dnf install dnf-automatic

The dnf-automatic are not installed by default on the CentOS system, it’s available on the BaseOS repository. Install the dnf-automatic

Once the installation is complete, go to the ‘/etc/dnf’ directory and edit the configuration ‘automatic.conf’:

cd /etc/dnf/
nano automatic.conf

On the ‘[commands]’ section, change the ‘upgrade_type’ as you need. You can use ‘default’ for upgrading all packages or use the ‘security’ option to upgrade all packages related security.

[commands]upgrade_type = defaultdownload_updates = yes

On the ‘[emitters]’ section, uncomment the ‘system_name’ option and change the value with your hostname. Then change the ’emit_via’ option to motd, so you will be displayed about package updates on every login.

[emitters]system_name = hakase-centos8emit_via = motd

Save and close.

Automatic Install Package Upgrades

For the automatic installation of package upgrades, you can run the ‘dnf-automatic-install’ timer service.

Start the ‘dnf-automatic-install’ timer service and add it to the system boot.

sudo systemctl enable --now dnf-automatic-install.timer

After that, check the status of the dnf-automatic timer.

sudo systemctl list-timers *dnf-*

You will get the ‘dnf-automatic-install’ timer on the list.

Now on every login action to the CentOS 8 server, you will see the summary of package upgrade applied as a motd (message of the day).

And all package upgrades have been applied automatically through the ‘dnf-automatic-install’ timer service.