How to upgrade from Debian 11 to Debian 12
on the other hand already upgraded 3 Debian 11 to Debian 12 and all managed to boot up and decrypt their root harddisk (this is THE major heart attack moment X-D)
- MAKE SURE TO HAVE A FULL BACKUP OF THE SYSTEM OR AT LEAST THE IMPORTANT DATA! (which SHOULD BE IN THE USER’S /HOME FOLDER)
- MAKE SURE THERE IS ENOUGH (AT LEAST 10GB) OF FREE DISK SPACE ON THE root harddisk partition (usually /dev/sda1)
(it really is not that bad, the old config should just work fine after the upgrade but stil… BACKUP ALL CONFIG FILES! :D)-
cp -rv /etc/ssh/sshd_config /etc/ssh/sshd_config.backup cp -rv /etc/apache2/apache2.conf /etc/apache2/apache2.conf.backup cp -rv /etc/apache2/conf-available/security.conf /etc/apache2/conf-available/security.conf.backup cp -rv /etc/apache2/sites-available/000-default.conf /etc/apache2/sites-available/000-default.conf.backup cp -rv /etc/apache2/sites-available/default-ssl.conf /etc/apache2/sites-available/default-ssl.conf.backup - Update from Debian 11 to Debian 12:
- use one’s update script to get Debian 11 to the latest packages WHILE making some space on the boot partition for newer kernels (running out of disk space on the boot partition is annoying as heck X-D)
-
reboot -
su - root apt update apt upgrade apt --purge autoremove
-
# now reboot to have the latest Debian 11 kernel # then continue sed -i 's/bullseye/bookworm/g' /etc/apt/sources.list sed -i 's/bullseye/bookworm/g' /etc/apt/sources.list.d/* # check if everything ok with the file vim /etc/apt/sources.list apt update apt upgrade --without-new-pkgs apt full-upgrade # it will show important changes to packages that can be quit with 'q' # it will ask if services shall be restarted automatically, confirm with 'y' reboot
- if all goes well, the user is now booting Debian 12 with this kernel 😀
-
uname -a Linux hostname 6.1.0-10-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.38-2 (2023-07-27) x86_64 GNU/Linux
-
- to finalize the upgrade, create and run this update.sh script
- then reboot again
- update-migrate the dev’s php src from php7.4 to php8.2 (usually only cosmetic changes but sometimes whole functions are deprecated and replaced, maybe sometimes for simplification reasons, yes it kind of sucks to have to keep an eye on this but it makes sense in order for PHP to get better and better)
(it really is not that bad, the old config should just work fine after the upgrade but stil… BACKUP ALL CONFIG FILES! :D)Apache2 upgrade problems not running PHP(8.2) but output text of code
it seems this is a problem, because php7.4 config files are still installed
and libapache2-mod-php8.2 does not get installed automatically
lsb_release -d; # tested on Description: Debian GNU/Linux 12 (bookworm) # install new version of php for apache2 apt install libapache2-mod-php8.2 dpkg -l|grep php rc libapache2-mod-php7.4 7.4.33-1+deb11u4 amd64 server-side, HTML-embedded scripting language (Apache 2 module) ii libapache2-mod-php8.2 8.2.7-1~deb12u1 amd64 server-side, HTML-embedded scripting language (Apache 2 module) ii php-common 2:93 all Common files for PHP packages ii php-db 1.11.0-0.2 all Database Abstraction Layer ii php-imagick 3.7.0-4 amd64 Provides a wrapper to the ImageMagick library ii php-memcache 8.0+4.0.5.2+3.0.9~20170802.e702b5f9+-8 amd64 memcache extension module for PHP ii php-mysql 2:8.2+93 all MySQL module for PHP [default] ii php-pear 1:1.10.13+submodules+notgz+2022032202-2 all PEAR Base System ii php-xml 2:8.2+93 all DOM, SimpleXML, WDDX, XML, and XSL module for PHP [default] rc php7.4-cli 7.4.33-1+deb11u4 amd64 command-line interpreter for the PHP scripting language rc php7.4-common 7.4.33-1+deb11u4 amd64 documentation, examples and common module for PHP rc php7.4-curl 7.4.33-1+deb11u4 amd64 CURL module for PHP rc php7.4-gd 7.4.33-1+deb11u4 amd64 GD module for PHP rc php7.4-intl 7.4.33-1+deb11u4 amd64 Internationalisation module for PHP rc php7.4-json 7.4.33-1+deb11u4 amd64 JSON module for PHP rc php7.4-mbstring 7.4.33-1+deb11u4 amd64 MBSTRING module for PHP rc php7.4-mysql 7.4.33-1+deb11u4 amd64 MySQL module for PHP rc php7.4-opcache 7.4.33-1+deb11u4 amd64 Zend OpCache module for PHP rc php7.4-pspell 7.4.33-1+deb11u4 amd64 pspell module for PHP rc php7.4-readline 7.4.33-1+deb11u4 amd64 readline module for PHP rc php7.4-sqlite3 7.4.33-1+deb11u4 amd64 SQLite3 module for PHP rc php7.4-tidy 7.4.33-1+deb11u4 amd64 tidy module for PHP rc php7.4-xml 7.4.33-1+deb11u4 amd64 DOM, SimpleXML, XML, and XSL module for PHP rc php7.4-xmlrpc 7.4.33-1+deb11u4 amd64 XMLRPC-EPI module for PHP rc php7.4-zip 7.4.33-1+deb11u4 amd64 Zip module for PHP ii php8.2-cli 8.2.7-1~deb12u1 amd64 command-line interpreter for the PHP scripting language ii php8.2-common 8.2.7-1~deb12u1 amd64 documentation, examples and common module for PHP ii php8.2-imagick 3.7.0-4 amd64 Provides a wrapper to the ImageMagick library ii php8.2-memcache 8.0+4.0.5.2+3.0.9~20170802.e702b5f9+-8 amd64 memcache extension module for PHP ii php8.2-mysql 8.2.7-1~deb12u1 amd64 MySQL module for PHP ii php8.2-opcache 8.2.7-1~deb12u1 amd64 Zend OpCache module for PHP ii php8.2-phpdbg 8.2.7-1~deb12u1 amd64 server-side, HTML-embedded scripting language (PHPDBG binary) ii php8.2-readline 8.2.7-1~deb12u1 amd64 readline module for PHP ii php8.2-xml 8.2.7-1~deb12u1 amd64 DOM, SimpleXML, XML, and XSL module for PHP # can also try a2dismod php7.4 a2enmod php8.2 # remove the old php7.4 INCLUDING the config files apt --purge remove php7* # restart apache systemctl restart apache2
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