General

Introduction SQLi is the manipulation of a security flaw in database systems. WordPress, as a platform, runs server-side scripts in PHP and uses SQL databases. Hence, SQL and PHP make WordPress websites vulnerable to attackers. They could insert malicious URLs (which are embedded with commands) that trigger unwanted behaviors from your database. Consequently, your database’s…

In this article, we will explain swap space, and learn how to create swap space using a swap file in Linux: this is important in case we don’t have a swap partition created on the hard disk. Swap space/partition is space on a disk created for use by the operating system when memory has been…

How to automatically clean up /tmp directory contents in Linux?   Every Linux system has a directory called /tmp which has mounted with separate file system. It has special filesystem called tmpfs. It’s a virtual filesystem and operating system will automatically mount /tmp mount point while system booting. If you want to mount /tmp directory separately as…

AWS doesn’t grant root access by default to EC2 instances. This is an important security best practise. Users are supposed to open a ssh connection using the secure key/pair to login as ec2-user. Users are supposed to use the sudo command as ec2-user to obtain elevated privileges. Problems arise with a number of software packages…

If you’re on a cPanel server, you’ve probably noticed a sizable folder called ‘virtfs’ sitting in /home, which would appear at first to be using a ton of space. Your first inclination might be to delete it, but don’t! Most likely, the files in that folder are actually just hard links or bind mounts and…

XAMPP is a helpful development tool. However, you may run into problems at some point, such as receiving the notification: “Apache shutdown unexpectedly”. This error might seem to come out of nowhere, so identifying the cause – let alone the solution – can be puzzling. See how Kinsta stacks up against the competition. Fortunately, there is a…

Listing sizes in AWS S3 Buckets Getting the whole bucket size aws s3 ls s3://$BUCKETNAME/ –recursive –human-readable –summarize | tail -n2 Tail is used because otherwise all files will be printed on screen (but you may want that for some reason). Getting the size of a specific directory/file You just need to add the path…

Send A Test Mail via Exim Command line Sending a test mail from a server with a configured exim is easy as pie. From your user shell: tell exim that we want to send a mail to an recipient and tell us about the details of the sending procedure $ exim -v receipient@foo.bar Tell exim…

5  0   *   *   *   /bin/find /tmp/ -type f -print0 | xargs -0 rm