Deprecated: Hook custom_css_loaded is deprecated since version jetpack-13.5! Use WordPress Custom CSS instead. Jetpack no longer supports Custom CSS. Read the WordPress.org documentation to learn how to apply custom styles to your site: https://wordpress.org/documentation/article/styles-overview/#applying-custom-css in /home/everyuseful/public_html/wp-includes/functions.php on line 6085
Magento 2 Archives - EveryUseful

How to update Magento 2

Try the CLI update process:

1) On your terminal go into magento root folder.
2) Set magento 2 under maintenance mode

php bin/magento maintenance:enable

3) Search for the correct and latest magento 2 version

composer show magento/product-community-edition 2.3.* --all | grep -m 1 versions

4) Force your composer to use the latest version

composer require magento/product-community-edition=2.3.3 --no-update

5) Update your magento 2 installation

composer update

6) After successful update Upgrade magento and compile

php bin/magento setup:upgrade
bin/magento setup:di:compile

7) Disable maintenance mode and you are ready to check the correct version

php bin/magento maintenance:disable

from: https://community.magento.com/t5/Magento-2-x-Version-Upgrades/Upgrade-from-2-3-1-to-2-3-2-security-updates-correct-version-not/td-p/135324

How to put Magento 2 in maintenance mode

Even I think this should be a simple checkbox in Magento Control Panel but the most simple way I found is to put a file in var folder with the name of: var/.maintenance.flag

If you want to allow an ip or a group of ips you simply write this list of ips in a file: var/.maintenance.ip

Of course if you have access to CLI you can just type:

bin/magento maintenance:enable –ip=1.2.3.4

where –ip=1.2.3.4 is the ip that can access the website normally ..

if you use a shared hosting, to run the above command you have to go to the public_html folder first :
cd public_html

and then run the command using php
php bin/magento maintenance:enable –ip=1.2.3.4

For more information go to :
https://devdocs.magento.com/guides/v2.3/install-gde/install/cli/install-cli-subcommands-maint.html