Introduction cURL is a command-line tool and library used to transfer data using various network protocols such as HTTP, HTTPS, FTP, and SFTP. It is widely used for testing website connectivity, interacting with APIs, downloading files, and troubleshooting network-related issues. On a LiteSpeed Web Server, cURL is commonly required by… Continue Reading Install curl in Litespeed webserver

Introduction When working with configuration files, scripts, log files, or text documents, you may encounter unwanted leading spaces before specific words. These extra spaces can affect formatting, cause parsing issues, or result in errors in scripts and configuration files. Linux provides several command-line utilities, such as sed, awk, and perl,… Continue Reading How to Remove a space in front of a word in a file

Introduction MailScanner is one of the most widely used email security gateways for Linux mail servers. It scans incoming and outgoing emails for viruses, spam, phishing attempts, and potentially dangerous attachments. By default, MailScanner may block certain file extensions based on its security policies. In some environments, organizations need to… Continue Reading Mailscanner : Allow extensions like .docx, .dox

Introduction MailScanner scans email attachments to protect mail servers from malicious files. By default, it may block archive files such as .zip, .tar, and .gz if they contain executable or potentially dangerous file types. If required, you can configure MailScanner to allow these archive formats while continuing to scan the… Continue Reading Mailscanner: allow .zip .tar .gz extension in email

Introduction If you open a website hosted on Microsoft Internet Information Services (IIS) and see an Authorization Error, it usually means the web server is denying access to the requested resource. This is one of the most common issues faced by Windows Server administrators, DevOps engineers, and web developers. Typical… Continue Reading Authorization erorr IIS home page

Introduction When using Plesk PHP 5.3.x, PHP applications may return an Internal Server Error (500) when the PHP handler is configured as CGI or FastCGI (FCGI). Changing the PHP handler alone may not resolve the issue. A common cause is incorrect ownership of the suexec binary, which prevents Apache from… Continue Reading How to Fix Plesk Internal Server Error with PHP CGI/FCGI

Introduction Exim is the default Mail Transfer Agent (MTA) used on many cPanel/WHM servers. When a server is suspected of sending a large volume of emails or spam, the eximstats utility can be used to analyze the Exim mail logs and identify the top email senders, recipients, and hosts. This… Continue Reading Detect Top 10 Spammers in Exim Using Eximstats

Introduction DNS cache stores recently resolved domain names on your computer to improve browsing speed. However, after changing DNS records, updating nameservers, or pointing a domain to a new server, your system may continue using the old cached information. Flushing the DNS cache forces your computer to retrieve the latest… Continue Reading How to Flush the DNS Cache on Windows, Linux, and macOS

Introduction The “WordPress upload directory isn’t writable” error occurs when WordPress does not have permission to write files to the uploads directory. This commonly happens after installing or updating third-party plugins, changing file ownership, migrating a website, or modifying file permissions. Without write access, WordPress cannot upload media files, install… Continue Reading Resolve “WordPress Upload Directory Isn’t Writable” Server Error

Introduction ConfigServer Security & Firewall (CSF) relies on several Linux iptables kernel modules to provide advanced firewall and security features. If some of these modules are unavailable, running the CSF test (csftest.pl) will display errors such as: Although CSF can still function with basic firewall capabilities, features such as PORTFLOOD… Continue Reading How to Resolve CSF Missing iptables Modules Errors