Upgrade Moodle to the latest version

1. Backup of old moodle

Take the backup of your existing moodle directory, moodle filefolder and database. Either you can make use a database kept in your pen drive otherwise you can apply following command to take the backup,

First install the zip command using apt command or apt-get command. Open the terminal and type the following command:

sudo apt install zip unzip

Archive the current moodle and moodledata directories

cd /var/www/html

sudo zip -r moodlerecovery.zip moodle moodledata

sudo mv moodlerecovery.zip /home/mahesh/Downloads

sudo su

mysqldump -uroot -p moodle | xz > moodle.sql.xz

Provide MySQL root password, when it asks.

2. Install latest Moodle

Follow the instructions in Moodle document with a MySQL/MariaDB user and password for moodle database. then remove new moodledata folder

sudo rm -rf /var/www/html/moodledata

3. Restoration of old Moodle database to a new one

Copy your database backup from your pen drive to home folder. Extract moodlerecovery.zip and the backup file (moodle.sql.xz), backup the extension will be .sql. Then move old moodledata to new web document root and restore the backup to the new Moodle installation.

sudo mv /moodlerecovery/moodledata /var/www/html/

sudo chmod 777 -R /var/www/html/moodledata

sudo cp moodlerecovery/moodle/config.php /var/www/html/moodle

sudo cp -pr moodlerecovery/moodle/theme/mytheme 

sudo cp -pr moodlerecovery/moodle/mod/mymod /var/www/html/moodle/mod/mymod

sudo chown -R root:root /var/www/html/moodle

sudo chmod 775 -R /var/www/html/moodle

Proceed with onsite wizad and can upgrade database etc..

Reference: https://docs.moodle.org/39/en/Upgrading#Install_the_new_Moodle_software

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