View source for Upgrade da Debian Stretch a Buster

=Preparazione=

* Leggere [https://www.debian.org/releases/buster/amd64/release-notes/ch-upgrading.en.html#for-next Chapter 4. Upgrades from Debian 9 (stretch)]
==Cambiamento nomi interfacce ethernet==

* Da questa release, viene interrotto il supporto alias ai nomi delle interfacce. Occorre migrare al nuovo schema di denominazione.

* Identificare tutte le interfacce:

 echo /sys/class/net/[ew]*

 /sys/class/net/eth0 /sys/class/net/eth1

* Disabilitare lo script udev:
 cd /etc/udev/rules.d/
 mv 70-persistent-net.rules 70-persistent-net.rules.old

* Identificare i nuovi nomi:

 udevadm test-builtin net_id /sys/class/net/eth0 2>/dev/null

 ID_NET_NAME_MAC=enx6c626d50fe77
 ID_OUI_FROM_DATABASE=Micro-Star INT'L CO., LTD
 ID_NET_NAME_PATH=enp2s0

 udevadm test-builtin net_id /sys/class/net/eth1 2>/dev/null

 ID_NET_NAME_MAC=enx0008a1c7e44f
 ID_OUI_FROM_DATABASE=CNet Technology Inc.
 ID_NET_NAME_PATH=enp3s0

* Trovare i riferimenti al primo nome e verificare:

 sudo rgrep -w eth0 /etc

<pre>
/etc/samba/smb.conf:;   interfaces = 127.0.0.0/8 eth0
/etc/initramfs-tools/initramfs.conf:# Specify a specific network interface, like eth0
/etc/network/if-up.d/upstart:	# Ignoring unknown interface eth0=eth0.
/etc/network/interfaces:auto eth0
/etc/network/interfaces:iface eth0 inet manual
/etc/network/interfaces:#iface eth0 inet static
/etc/network/interfaces:	bridge_ports eth0
/etc/dhcp/dhclient.conf:#  interface "eth0";
/etc/dhcp/dhclient.conf:#  interface "eth0";
/etc/dhcp/dhclient.conf.dpkg-old:#  interface "eth0";
/etc/dhcp/dhclient.conf.dpkg-old:#  interface "eth0";
/etc/xen/scripts/network-bridge-wrapper:#/etc/xen/scripts/network-bridge netdev=eth0 bridge=xenbr0 start
/etc/xen/scripts/network-bridge-wrapper:/etc/xen/scripts/network-bridge netdev=eth0 start
/etc/xen/scripts/network-bridge-wrapper:# 1.) list all dom0 interfaces you want to be able to use (except your eth0!) in "more_bridges" below
/etc/udev/rules.d/70-persistent-net.rules.old:SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="6c:62:6d:50:fe:77", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
</pre>

* Trovare i riferimenti al secondo nome e verificare:

 sudo rgrep -w eth1 /etc

<pre>
/etc/network/interfaces:auto eth1
/etc/network/interfaces:iface eth1 inet manual
/etc/network/interfaces:	bridge_ports eth1
/etc/xen/scripts/network-bridge-wrapper:#/etc/xen/scripts/network-bridge netdev=eth1 bridge=xenbr1 start
/etc/xen/scripts/network-bridge-wrapper:more_bridges="eth1"
/etc/udev/rules.d/70-persistent-net.rules.old:SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:1b:21:70:c6:e9", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"
/etc/udev/rules.d/70-persistent-net.rules.old:SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:08:a1:c7:e4:4f", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"
</pre>

* Se la sostituzione ha senso, eseguirla:

 for FILE in $(sudo rgrep -l -w eth0 /etc); do sed -i -e 's/eth0/enp2s0/g' $FILE; done

 for FILE in $(sudo rgrep -l -w eth1 /etc); do sed -i -e 's/eth1/enp3s0/g' $FILE; done

* Rimuovere eventuali forzature, soprattutto per VM VirtIO:

 rm /etc/systemd/network/99-default.link
 rm  /etc/systemd/network/50-virtio-kernel-names.link

* Aggiornare initrd e fare reboot:

 sudo update-initramfs -u
 reboot

* Verificare la presenza di bond e dummy interface (Vedi Riferiemnti)

==Certificati SSL==
* Attenzione se si usano certificati SSL Self signed vecchi: oora devono avere key di almeno 2048 bits e digest SHA256

==Iptables==
All the iptables binaries have been moved away from /sbin to /usr/sbin.
Some compatibility symlinks have been added for the Buster release cycle

==Samba==
The samba service has been removed. Use the individual services instead:
* nmbd
* smbd
* samba-ad-dc
==util-linux==
 The cfdisk, fdisk and sfdisk utilities has been split out into a separate fdisk package

==Software non più presenti==
* phpmyadmin
* ipsec-tools and racoon
* ssmtp

==Riferimenti==
[https://www.debian.org/releases/buster/amd64/release-notes/ch-information.en.html Chapter 5. Issues to be aware of for buster]

=Post upgrade=
* Fare purge vecchi initd:
 apt purge initscripts sysv-rc insserv startpar

* Installare la versione corretta di znapzned, ricompilata.