Computer Science

Computer Science

In this section, we explore the world of programming, algorithms, networks, and infrastructure

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Featured Articles

How to Use rsync for Remote /home Backups and Advanced Backup Handling in DirectAdmin

This guide explains how to use rsync to back up the /home directory to a remote server, how to combine rsync with DirectAdmin backups, how to keep both local and remote copies, how to repair corrupted backup archives, how to work with tar.zst files, and how to troubleshoot MySQL and FTP backup errors. It also covers advanced backup hooks such as user_backup_post and hard‑link safety checks.

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Managing Large Users and Optimizing Backup Scheduling in DirectAdmin

Large user accounts and heavy backup operations can significantly increase server load. DirectAdmin provides multiple techniques to reduce system pressure, distribute backup tasks, use rsync for heavy data, move large directories into skipped paths, control system load before backups, avoid quota conflicts, and restrict backup creation to specific time windows. This article explains all practical methods and scripts in detail.

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Remote Backup Handling in DirectAdmin: FTP Transfers, Debugging, Custom ftp_upload.php, and Alternative Upload Methods

DirectAdmin currently supports remote backups via FTP/FTPS. This article explains how to configure remote FTP backups, manually test the ftp_upload.php script, understand all available environment variables, customize the upload process, convert ftp_upload.php to use curl or ncftpput, and troubleshoot common issues. It also covers how to override the default PHP-based uploader for advanced workflows.

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How to Convert ftp_download.php to Use ncftpgetc

DirectAdmin allows full customization of its FTP download and upload mechanisms. This article explains how to convert ftp_download.php to ncftpget, how to slow down backup operations to avoid flooding remote FTP servers, how to build a redundant backup server using automated restores or rsync, and how to add dates or checksums to backup filenames using a custom ftp_upload.php script.

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Comprehensive Guide to Migrating Accounts in DirectAdmin: Moving Users, Avoiding Sync Issues, Multi Server Transfers, and rsync Data Pulling

This article explains how to migrate users between resellers, avoid synchronization issues during backup/restore operations, handle transfers between multi server setups, manage DNS and domain conflicts, and efficiently move large data directories using rsync. It provides practical steps, scripts, and best practices for smooth account migration in DirectAdmin.

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Comprehensive Guide to Migrating Accounts in DirectAdmin

This article explains how to migrate users between resellers, avoid synchronization issues during backup/restore operations, handle transfers between multi server setups, manage DNS and domain conflicts, and efficiently move large data directories using rsync. It provides practical steps, scripts, and best practices for smooth account migration in DirectAdmin.

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Full DirectAdmin Migration Guide: Server Preparation, DNS Planning, and Three Complete Transfer Methods

This guide provides a complete, step by step approach to performing a full DirectAdmin migration. It covers preparing the destination server, DNS considerations, copying custom configurations, and three migration strategies: full backups, partial backups with home directory sync, and advanced migrations with MySQL synchronization. Each method includes detailed instructions, warnings, and best practices to ensure a smooth and reliable migration.

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Complete cPanel to DirectAdmin Migration Guide: Known Issues, Full Transfer Methods, and Single Account Conversion

This guide explains everything required to migrate accounts from cPanel to DirectAdmin, including known limitations, username/database compatibility issues, backup preparation, bulk transfers, single account conversions, and how to properly convert cPanel backups into DirectAdmin compatible formats. It also includes automation tips, rsync transfer methods, and post migration reseller reassignment.

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CLI Backup with Borg in DirectAdmin: Incremental Backup Strategy, Automation Script, and Full Restore Guide

This article provides a complete guide to using Borg as an advanced incremental backup system for DirectAdmin. It covers preparing DirectAdmin backups, installing Borg, creating local or remote repositories, automating backups with a post-backup script, managing retention policies, and performing full restores by mounting Borg archives. Borg serves as a powerful, free alternative to FTP-based remote backups.

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Complete Restore and Recovery Guide in DirectAdmin: Managing Backups, Monitoring Progress, Debugging, and System-Level Restoration

This article provides a comprehensive guide to restoring backups in DirectAdmin. It covers restoring backups through the panel, monitoring restore progress, understanding key restore settings, debugging the restore process, handling restores on Personal licenses, restoring system-level backups (sysbk), and using the reseller_override option to control account ownership during admin-level restores.

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Complete Guide to Rebuilding the /etc/virtual Directory in DirectAdmin: Repair Scripts, Permissions Reset, and Parallel Restore Locking

This article provides a full, step by step guide to rebuilding the /etc/virtual directory in DirectAdmin. It covers restoring missing files, regenerating domains and domainowners lists, repairing individual domain folders, resetting permissions across DirectAdmin system paths, and preventing useradd locking issues during parallel restores. All scripts and commands are included for safe and accurate recovery.

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Customizing Workflow in DirectAdmin: Hooks, Feature Sets, Command Control, and Plugin Management

This article provides a complete overview of how to customize and extend DirectAdmin’s workflow. It covers pre/post hook scripts, command-level access control, feature sets, plugin permissions, and package-based plugin management. These tools allow administrators to tailor DirectAdmin’s behavior, restrict or expand user capabilities, and integrate custom automation safely and efficiently.

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