sysadmin – Page 2 – ITFROMZERO

Boost HDD Speed by 10x with bcache: Use an Old SSD as Cache on Linux

By admin June 14, 2026

Don't let slow HDDs bottleneck your system. Here is a detailed guide on using bcache to turn an SSD into a cache for your HDD, multiplying IOPS at a minimal cost.

Fedora

Deploying PostgreSQL on Fedora Server: Securing with SELinux and Firewalld

By admin June 14, 2026

A guide to installing production-ready PostgreSQL on Fedora Server. Focuses on SELinux security, Firewalld configuration, and performance optimization tips from real-world experience.

Ubuntu

Managing Hundreds of Ubuntu Servers Centrally: A Guide to Installing Canonical Landscape (Self-hosted)

By admin June 13, 2026

Don't let managing dozens of Ubuntu servers become a nightmare. Here is a detailed guide on installing Canonical Landscape (Self-hosted) for centralized administration, automated updates, and professional system monitoring.

Docker

Docker Log Rotation: The Ultimate Guide to Preventing Full Server Disks for DevOps

By admin June 13, 2026

Don't let your server crash due to log bloat! Here is a detailed guide on configuring Docker Log Rotation, limiting log file sizes, and quick fixes for when your disk hits 100%.

Linux

Advanced find Command on Linux: Filter Files by Multiple Criteria and Automate Bulk Operations with -exec and xargs

By admin June 10, 2026

The advanced Linux find command lets you filter files by time, size, permissions, and multiple combined conditions. Paired with -exec or xargs, you can automate batch operations on hundreds of files with a single command — from clearing server logs to running security checks.

Linux

Managing /etc Configuration with etckeeper: A Safety Net for Every SysAdmin

By admin June 10, 2026

Stop worrying about misconfiguring system files. Learn how to use etckeeper to manage /etc with Git, allowing you to track history and restore Linux configurations in seconds.

Linux

Configuring systemd-boot for Linux: Faster, Sleeker, and Much ‘Cleaner’ Than GRUB2

By admin June 8, 2026

Forget GRUB2; systemd-boot is the future for Linux users who love minimalism. Here is a detailed guide on how to install, configure, and automate this ultra-lightweight bootloader for UEFI systems.

Network

Scan Millions of IPs Instantly with Masscan: Speed, Power, and Critical Precautions

By admin June 6, 2026

Learn how to use Masscan to scan millions of IPs in minutes. This article covers speed optimization, JSON output, and best practices to avoid network crashes during large-scale scans.

Network

Configuring Dante SOCKS5 Proxy on Linux: 6 Months of ‘Real-World’ Experience and Hard-Learned Lessons

By admin June 6, 2026

Practical experience installing and optimizing Dante SOCKS5 Proxy for a team of 50. This guide covers ACL configuration, user security, and avoiding common log file or DNS leak issues.

Linux

AutoFS on Linux: Automatically Mount and Unmount Network Drives (NFS/Samba) Flexibly and Reliably

By admin June 5, 2026

AutoFS is the perfect fstab replacement for mounting NFS/Samba network drives on Linux. This guide covers detailed configuration for automatically mounting on demand and unmounting when idle, keeping your server stable and preventing hangs.