If you are using a dedicated server with a few GB of RAM then you will not have this problem. But if you are running cloud computing with small virtual server like vultr.com then you may end up in this problem: the mysql/mariadb server will run out of memory.

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WordPress is a free and open-source content management system (CMS) based on PHP and MySQL.WordPress is the most popular blogging system in use on the Web.

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SSH has two protocols that can be used, protocol 1 and protocol 2. More about SSH you can found on Wikipedia.

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By default, ssh listens for incoming connections on port 22. So if a hacker wants to attack your machine he will most likely scan port 22 first. Just to make an idea how important is this (from my point of view of course), before changing the default ssh port for my server I got every day 1000+ login tries for my root user. An effective (but minimal) method to protect your machine is to run ssh on non-standard port. Any unused port will work but one above 1024 is preferable.

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Probably all of us who works on daily basis with Linux servers faces this "problem": login with putty on remote server with user and password for one hundred time a day. A solution would be to save the username and the password, so one step to do the job. Of course this is not a secure way to do it, but is suitable for test servers and also from personal computers.

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