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--- doc:appunti:linux:sa:apt_sources [2023/09/13 12:55] – [Pacchetti Raspbian archiviati] niccolo
+++ doc:appunti:linux:sa:apt_sources [2025/02/28 15:05] (current) – [Pinning] niccolo
@@ Line 65: / Line 65: @@
 deb-src  http://deb.debian.org/debian           bullseye-updates  main contrib non-free
 </file>
+===== Debian 12 Bookworm =====
+È stata aggiunta la componente **non-free-firmware**:
+<file>
+deb     http://deb.debian.org/debian bookworm         main contrib non-free non-free-firmware
+deb-src http://deb.debian.org/debian bookworm         main contrib non-free non-free-firmware
+deb     http://deb.debian.org/debian bookworm-updates main contrib non-free non-free-firmware
+deb-src http://deb.debian.org/debian bookworm-updates main contrib non-free non-free-firmware
+deb     http://security.debian.org/debian-security/  bookworm-security main contrib non-free non-free-firmware
+deb-src http://security.debian.org/debian-security/  bookworm-security main contrib non-free non-free-firmware
+</file>
 ===== Debian Multimedia (Marillat) =====
@@ Line 128: / Line 142: @@
 Pin-Priority: 999
 </file>
+====== Install from backporting ======
+Add the backports source to **/etc/apt/sources.list** file, something like:
+<file>
+deb http://deb.debian.org/debian bookworm-backports main
+</file>
+update the packages list:
+<code>
+apt update
+</code>
+All backports are deactivated by default so that the normal operation of a stable installation will not be compromised with potentially disruptive changes (all backported packages are pinned to priority 100).
+To install a package specifically from the backports, execute:
+<code>
+apt install <package>/bookworm-backports
+</code>
+See **[[https://backports.debian.org/Instructions/|Debian Backports ›› Instructions]]**.
+====== Forcing version or downgrading ======
+Può capitare una situazione in cui si voglia tornare ad una versione precedente di un pacchetto. Ad esempio dopo l'upgrade di release da Debian 11 Bullseye a Debian 12 Bookworm è capitato che il pacchetto **firefox-esr** fosse rimasto quello della distribuzione precedente: **115.3.1esr-1~deb11u1**, mentre nella distribuzione 12 era disponibile **115.3.0esr-1~deb12u1** (entrambi venivano dalla sezione security delle distribuzioni). Per forzare l'allineamento a Debian 12 Bookworm si è dovuto fare il downgrade:
+<code>
+apt install firefox-esr=115.3.0esr-1~deb12u1
+</code>
 ====== apt-cacher-ng ======