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Linux VPS and dedicated server guides: disks, LVM, SSH, swap, firewall and troubleshooting.

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Popular Tutorials

1How to Enable BBR on Linux: Turn On TCP BBR Congestion Control Manually 2How to Install aaPanel / BaoTa Panel on a Linux Server: One-Click Install, Open Ports and Log In 3Windows Remote Desktop Connection Failed: Troubleshooting RDP Port 3389, Firewall and CredSSP Errors 4Linux SSH Connection Failed? Troubleshooting Connection Refused, Timeouts and Login Errors 5Linux Disk Full? How to Check and Free Up Disk Space and Find Large Files

Linux Server Tutorials

Linux Server How to Partition, Format and Mount a Data Disk on Linux (Auto-Mount at Boot) Mount a data disk on Linux: partition with fdisk or parted, format ext4/XFS and auto-mount via fstab UUID. 6 steps11 min read Read tutorial

Linux Server How to Extend a Disk on Linux with LVM (lvextend, resize2fs, xfs_growfs, growpart) Extend a Linux disk with LVM: lvextend, resize2fs or xfs_growfs, and grow the root partition with growpart. 6 steps10 min read Read tutorial

Linux Server Linux Disk Full? How to Check and Free Up Disk Space and Find Large Files Free up Linux disk space: df -h, du and ncdu, find large files, clean journald logs and Docker data. 7 steps11 min read Read tutorial

Linux Server How to Change the SSH Port and Root Password on Linux (Firewall and SELinux Included) Change the SSH port and root password on Linux: sshd_config, SELinux, firewalld/ufw and passwd. 7 steps11 min read Read tutorial

Linux Server Set Up SSH Key Login on Linux and Disable Password Authentication (ed25519) Set up SSH key login on Linux with ed25519 and ssh-copy-id, then safely disable password login. 6 steps11 min read Read tutorial

Linux Server Linux SSH Connection Failed? Troubleshooting Connection Refused, Timeouts and Login Errors Fix Linux SSH connection refused or timed out: check sshd, firewall and fail2ban, recover via VNC. 7 steps12 min read Read tutorial

Linux Server How to Add Swap Space on Linux: Create a Swap File and Tune Swappiness Add swap space on Linux: create a swap file, enable it with mkswap and swapon, and tune swappiness. 6 steps9 min read Read tutorial

Linux Server Linux Firewall Setup: How to Open Ports with firewalld and ufw Linux firewall guide: open ports with firewalld and ufw, restrict source IPs and avoid SSH lockout. 6 steps11 min read Read tutorial

Linux Server How to Reinstall the OS on a Linux VPS with a One-Click DD Script (2026) Reinstall Debian, Ubuntu, Rocky and more on a Linux VPS, or DD a custom image, with the open-source bin456789/reinstall script, plus backup and VNC rescue prep. 6 steps16 min read Read tutorial

Linux Server Forgot Your Linux Root Password? How to Reset It (2026 Guide) Forgot your Linux root password? Reset it via VNC with GRUB rd.break or init=/bin/bash, or rescue mode and chroot. Works on Ubuntu, Debian, Rocky and AlmaLinux. 5 steps15 min read Read tutorial

Linux Server Server Benchmarking Guide 2026: How to Read bench.sh, YABS and fio Results Benchmark VPS and dedicated server CPU, disk I/O and network with bench.sh, YABS, Geekbench and fio, and learn what each result means and what good looks like. 6 steps18 min read Read tutorial

Linux Server Website and Server Migration with rsync and mysqldump: Near-Zero Downtime Guide Complete server migration guide: pre-migration checklist, incremental file sync with rsync, MySQL migration via mysqldump, and lowering DNS TTL to cut downtime. 6 steps18 min read Read tutorial

Linux Server How to Install Docker and Docker Compose on Debian, Ubuntu, Rocky Linux and AlmaLinux Install Docker and Docker Compose from the official repo on Debian/Ubuntu and Rocky/AlmaLinux, then secure ports. 7 steps15 min read Read tutorial

Linux Server Nginx Reverse Proxy Setup: Node/Python Apps, WebSocket, Real Client IP, HTTPS and 502 Fixes Nginx reverse proxy for a Node/Python app on port 3000: WebSocket, real client IP, certbot HTTPS and 502 fixes. 6 steps15 min read Read tutorial

Linux Server How to Back Up a Linux Server: rsync, tar + cron, MySQL/MariaDB Dumps and restic to S3 Linux server backup with rsync, tar + cron, rotated MySQL/MariaDB dumps and restic to S3, plus restore tests. 5 steps16 min read Read tutorial

Linux Server Linux Time Zone, NTP Time Sync, Hostname and DNS Settings (timedatectl, chrony, hostnamectl) Change the Linux time zone with timedatectl, enable NTP sync with chrony, set the hostname, /etc/hosts and DNS. 6 steps14 min read Read tutorial

Linux Server Linux Server Monitoring: Check CPU, Memory, Disk I/O and Bandwidth Usage (top, iostat, iftop, vnstat) Linux server monitoring: CPU, memory, disk I/O and bandwidth with top, iostat, iftop, vnstat, ss and cron alerts. 7 steps15 min read Read tutorial

Linux Server How to Install and Configure Fail2ban to Protect SSH and Nginx Websites (Debian, Ubuntu, Rocky) Fail2ban setup: stop SSH brute force with the sshd jail, protect Nginx, use ufw/firewalld, unban and whitelist IPs. 6 steps15 min read Read tutorial

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