As a sysadmin, you’re going to have to prioritize the amount of time you’ll spend monitoring your system. Some of the checks you will perform will be easy, and some will be hard. You definitely won’t be able to test how restorable a backup is every other day. However, there are many quick and easy checks you can perform to ensure server failure does not occur on your watch. Here are 3 of the easiest checks you can perform, according to https://bctconsulting.com/visalia-it-support/:
Running out of disk space is one of the worst disasters your server can face. It’s hard to predict what your server might do if it runs out of disk space, but it is somewhere between being unresponsive and crashing completely. Any emails you get won’t be stored; CMS uploads can’t be stored so they might fail, Cron jobs might fail, and so on.
One of the worst things about running out of disk space is that your server won’t even crash immediately. It will have subtle failures that grow less and less subtle over time. Your data might even get corrupted gradually but silently.
The good news is that you can prevent all of this by checking the available disk space frequently. It only takes the command ‘df’ on Linux and no more than 10 seconds of your time. On Windows, you can check your disk space via the Explorer.
You probably already know this, but it doesn’t hurt to say that you need to install all security updates in your system as soon as you can. Exploits for new vulnerabilities come up mere hours after those exploits are a matter of public knowledge. Sometimes those exploits are released before the vulnerabilities are even publically known. In a world where hackers have databases of all vulnerable systems, time is a valuable thing.
If you miss a security update, you might leave your customer data vulnerable to hackers and have a hard time cleaning your system and restoring it later, as well as the PR campaign that follows that.
You can prevent all of that by installing security updates as soon as they come out. They only take minutes in most cases but will save you a lot of trouble.
IN case you have SSL, or TLS encryption enabled on your web server, then you need to make sure your certificates are always valid. These expire after a certain amount of time, and you need to renew the certificate before their expiration date arrives. An expired certificate will pretty much mean your site is shut down since it will show error messages in browsers when users try to access the site.
Most sellers of such certificates frequently send reminders as your certificate draws closer to the expiration date. However, even then, it is a good idea to frequently check your certificate to make sure you have enough time before the expiry date to apply for a renewal.