Step-by-step help for your hosting

• cPanel File Manager: upload, extract and edit files

  Upload archives, extract them into the correct folder and edit files in the browser using cPanel File Manager — no FTP client required.

  BeginnerLinux server6 min read

• Set package and user resource limits in CloudLinux Manager (reseller guide)

  Change CPU, memory, I/O and process limits for a whole hosting package or a single cPanel account in WHM’s CloudLinux Manager, step by step with screenshots.

  IntermediateReseller hosting2 min read

• How to log in to WHM as a reseller

  Three ways to open WHM on an MdmHost reseller plan: one click from the dashboard, the :2087 URL, or the server hostname, plus fixes for common login errors.

  BeginnerReseller hosting3 min read

• Fix CORS errors: "No 'Access-Control-Allow-Origin' header"

  Understand browser CORS errors when a frontend calls an API on another domain, and fix them correctly in the app, Nginx or Apache, including preflight requests and credentials.

  IntermediateLinux VPS · cPanel hosting3 min read

• Website security checklist for hosting customers (with Imunify360)

  A practical security checklist for cPanel hosting customers: what Imunify360 already does for you, and the passwords, updates, backups and settings you still need to handle.

  BeginnercPanel hosting with Imunify3602 min read

• File upload blocked or deleted by Imunify360? Here is why

  Why Imunify360 blocks or removes files right after upload via FTP, File Manager or WordPress, how to confirm it was a malware detection, and what to do next.

  BeginnercPanel hosting with Imunify3602 min read

• Find and unblock an IP address in WHM with CSF

  Search CSF for a blocked IP, read why LFD blocked it, remove the block in WHM or SSH, and stop the same customer being blocked again.

  IntermediateWHM (root)2 min read

• Subdomain vs subdirectory: which should you use?

  Compare blog.example.com with example.com/blog: how each works technically, how search engines treat them and which structure suits blogs, shops, apps and languages.

  BeginnerEveryone2 min read

• LiteSpeed anti-DDoS: per-client throttling, reCAPTCHA and bot protection (root guide)

  Protect a LiteSpeed cPanel server from floods and bad bots as root: per-client connection throttling, server-level reCAPTCHA, wordpress brute-force protection and safe limits.

  AdvancedcPanel server with LiteSpeed (root)3 min read

• Clone a website to another domain or folder with Softaculous

  Copy a Softaculous-managed site to a new domain, subdomain or folder in a few clicks, with database and URLs updated, to move a site or start a new one from a template.

  BeginnercPanel hosting2 min read

• CloudLinux CageFS explained: what it does for your hosting account

  What CloudLinux CageFS is, how it isolates each cPanel account in its own file system, what you can and cannot see over SSH, and common CageFS questions.

  IntermediatecPanel hosting with CloudLinux3 min read

• Fix WordPress stuck in maintenance mode

  Remove the "Briefly unavailable for scheduled maintenance" message after a failed update by deleting the .maintenance file, then finish the update safely.

  BeginnercPanel hosting3 min read

• Migrate a WordPress site to MdmHost

  Move an existing WordPress site to MdmHost hosting without downtime: copy files and database, update wp-config, test with a hosts file and switch DNS.

  IntermediatecPanel hosting3 min read

• How to create hosting packages in WHM

  Create hosting packages in WHM with Add a Package. Set disk quota, bandwidth, domains, email and database limits, pick a feature list and name packages so account creation stays clean.

  BeginnerLinux server4 min read

• Fix PHP Fatal error: Class not found

  Fix "Class not found" errors in PHP apps: Composer autoload not loaded or outdated, missing vendor folder, wrong namespace or case-sensitive file names on Linux, and missing extensions.

  IntermediatecPanel hosting · Linux VPS2 min read

• How to fix ERR_NAME_NOT_RESOLVED

  ERR_NAME_NOT_RESOLVED means your browser could not turn the domain into an IP address. Learn how to fix it on your device and check the domain's DNS and registration.

  BeginnercPanel hosting2 min read

• Fix "Cookies are blocked or not supported by your browser" in WordPress

  Cannot log in because WordPress says cookies are blocked or not supported? Learn the real causes, from site URL mismatches to caching and stray output, and how to fix them.

  BeginnerWordPress on cPanel hosting2 min read

• How to fix ERR_SSL_VERSION_OR_CIPHER_MISMATCH

  ERR_SSL_VERSION_OR_CIPHER_MISMATCH means browser and server share no TLS version or cipher. Learn the causes, such as missing certificates, old TLS and new domains, and the fixes.

  IntermediatecPanel hosting2 min read

• How to fix ERR_EMPTY_RESPONSE

  ERR_EMPTY_RESPONSE means the server closed the connection without sending any data. Learn the causes, from PHP crashes and security rules to local network issues, and how to fix it.

  IntermediatecPanel hosting2 min read

• How to fix "SMTP authentication failed" email errors

  Your email client says SMTP authentication failed or keeps asking for a password? Learn the correct cPanel mail settings and how to fix login, port and blocked IP problems.

  BeginnercPanel hosting2 min read

Browse by topic

• Getting startedYour first hour with a new server: access, logins and basics.83 guides
• cPanelFiles, databases, email, domains and every cPanel tool, step by step.67 guides
• WHM & resellingWHM, packages, reseller accounts, WHMReseller and running a hosting brand.53 guides
• WordPressInstall, secure, speed up, migrate and fix WordPress sites.49 guides
• Email & webmailMailboxes, webmail, forwarders, spam filters and email delivery.67 guides
• DomainsRegistering, transferring and managing domains and nameservers.27 guides
• SSL certificatesFree AutoSSL, Let's Encrypt, paid certificates and HTTPS.41 guides
• CloudLinuxCloudLinux setup and use: LVE limits, CloudLinux Manager, CageFS and PHP/Node.js selectors.31 guides
• LiteSpeedLiteSpeed Web Server, LSCache and the LiteSpeed Cache plugin: install, settings and tuning.35 guides
• Imunify360Malware scanning, firewall and proactive defence with Imunify360.24 guides
• SoftaculousInstall, update, clone and back up apps with Softaculous.24 guides
• WP SquaredcPanel's WordPress platform: sites, plugins, staging and backups.9 guides
• SitePadBuild and publish websites with the SitePad builder.9 guides
• SitejetDesign, edit and publish sites with the Sitejet builder.9 guides
• WHMResellerAlpha and master resellers with WHMReseller: install, setup and use.12 guides
• VirtFusionInstall, set up and manage VirtFusion: hypervisors, packages, servers and WHMCS integration.28 guides
• VirtualizorManage your VPS with Virtualizor: power, OS reinstall, VNC, IPs and backups.44 guides
• PleskWebsites, email, databases and settings in the Plesk panel.53 guides
• DirectAdminUsers, domains, email and reseller tools in DirectAdmin.41 guides
• WHMCSBilling, automation, products and client management with WHMCS.52 guides
• Control panelscPanel & WHM, Plesk, DirectAdmin and other panels on your VPS.107 guides
• SecurityKeys, passwords, firewalls and keeping a server patched.138 guides
• Networking & DNSIP addresses, reverse DNS, ports and traffic.72 guides
• Websites & appsWeb servers, WordPress, PHP, Node.js, SSL and app hosting.83 guides
• DatabasesMySQL, MariaDB, PostgreSQL, Redis and MongoDB on a VPS.80 guides
• Billing & accountInvoices, renewals, the client area and your account.9 guides
• TroubleshootingWhen something is not working: checks and fixes.127 guides
• Linux VPSSSH, packages, services and everyday Linux administration.265 guides
• Windows VPS & RDPRemote Desktop, Windows Server settings and Admin RDP tips.73 guides
• Docker & DevOpsContainers, Git deploys, automation, monitoring and backups.82 guides