Netopsiyon Online – Netopsiyon Online

CSS Container Queries: Responsive Components by Their Own Size

Secure PHP Logout and Revoke Sessions Across Devices

Verify a Downloaded File with SHA-256 on Windows and Linux

A Website Opens on Other Devices but Not One Computer

cPanel SMTP 421 Errors: Temporary Deferral or Connection Limit?

cPanel AutoSSL Stuck on Pending: What to Check

Linux Server Performance: Measure Before Tuning

Nginx and Apache Security: Review the Whole Request Path

Does Changing the SSH Port Improve Security?

Find Which Process Owns an Unexpected Open Port on Linux

Error Handling and Exceptions in PHP Image

PHP Error Handling and Exceptions in PHP

PHP is a widely-used scripting language in web applications. Like any software, applications written in PHP may also encounter errors. In this article...

Data Synchronization and Backup with rsync in Linux Image

Linux Data Synchronization and Backup with rsync in Linux

In Linux, rsync is one of the most effective tools for data backup and synchronization. Fast, secure, and efficient in file transfer, rsync facilitate...

Using Scheduled Tasks with Crontab in Linux Image

Linux Using Scheduled Tasks with Crontab in Linux

A command that works in a terminal may fail under cron because the user, environment, working directory, or permissions differ. Make the task work as ...

File and Directory Permissions in Linux: Using chmod and chown Image

Linux File and Directory Permissions in Linux: Using chmod and chown

In Linux, file and directory permissions are crucial for system security and user access control. Incorrect permissions can lead to unauthorized acces...

Laravel vs CodeIgniter: Which Framework is Better? Image

PHP Laravel vs CodeIgniter: Which Framework is Better?

When developing PHP-based web applications, two of the most popular frameworks are Laravel and CodeIgniter. Choosing between these two frameworks can ...

File Upload and Security Measures with PHP Image

PHP File Upload and Security Measures with PHP

File upload functionality is a common feature in web applications that allows users to upload documents, images, or other media files. However, securi...

Using JSON API with PHP and Fetching Data Image

PHP Using JSON API with PHP and Fetching Data

APIs are one of the most important tools for enabling data exchange between different systems in web development. JSON (JavaScript Object Notation) is...

Using Firewalls in Linux (iptables and firewalld) Image

Linux Using Firewalls in Linux (iptables and firewalld)

When changing a remote Linux firewall, preserve management access before adding restrictions. Keep the current SSH session open and verify an independ...

Automation with Bash Script: Basic Commands and Advanced Techniques Image

Linux Automation with Bash Script: Basic Commands and Advanced Techniques

Bash scripting is a powerful tool used to automate tasks and simplify system management in Linux systems. You can automate many operations such as ser...

Service Management with Systemd in Linux Image

Linux Service Management with Systemd in Linux

Service management is crucial in Linux operating systems. Systemd is the default system and service manager used in modern Linux distributions. It pro...

XSS (Cross-Site Scripting) Attacks and Prevention Techniques Image

Cyber Security XSS (Cross-Site Scripting) Attacks and Prevention Techniques

Cross-Site Scripting (XSS) attacks are among the most common threats in web security. These attacks allow malicious actors to inject harmful JavaScrip...

What is SQL Injection and How to Prevent It? Image

Cyber Security What is SQL Injection and How to Prevent It?

SQL injection occurs when an external value becomes part of the SQL structure instead of remaining data. Removing apostrophes from a form field is not...