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Linux Server

Linux VPS guides: SSH keys, SSH port, firewall, swap, disk cleanup, aaPanel and free SSL websites.

Linux Server

root@vps: ~ $ ssh-keygen -t ed25519 -C "laptop-2026"$ ssh-copy-id -i ~/.ssh/id_ed25519.pub root@203…$ ssh-copy-id -i ~/.ssh/id_ed25519.pub -p 2222 … Linux Server Linux SSH Key Login: Set Up ed25519 Keys and Disable Password Authentication Set up Linux SSH key login with ed25519, fix authorized_keys permissions and disable SSH password authentication safely on your VPS. 14 min read 1 Read tutorial

root@vps: ~ $ openssl rand -base64 18$ passwd root$ ss -tlnp | grep ':2222' || echo "port 2222 is… Linux Server How to Change the SSH Port and Root Password on a Linux VPS Safely Change the SSH port and root password on Linux: sshd_config, SELinux semanage, UFW/firewalld rules, Ubuntu ssh.socket and VNC rollback. 15 min read 0 Read tutorial

root@vps: ~ $ ss -tulpn$ sshd -T | grep -i '^port'$ nohup sh -c 'sleep 600; ufw disable' >/dev/nu… Linux Server Linux Firewall Setup: Configure UFW and firewalld on a VPS (IPv4 and IPv6) Configure a Linux firewall with UFW or firewalld: allow SSH first, open web ports, restrict by source IP, cover IPv6 and recover from lock-outs. 15 min read 1 Read tutorial

root@vps: ~ $ free -h$ swapon --show$ df -h / Linux Server How to Add Swap Space on a Linux VPS (512MB and 1GB Plans) Add swap space on a small Linux VPS: create a swap file with fallocate or dd, enable it in fstab and tune swappiness for 512MB-1GB plans. 12 min read 1 Read tutorial

root@vps: ~ $ df -hT$ df -i$ du -xh --max-depth=1 / 2>/dev/null | sort -h … Linux Server Linux Disk Full: How to Find and Free Disk Space on a VPS Linux disk full? Find what uses space with df, du and ncdu, then free it: journal, apt/dnf cache, Docker, big logs and deleted-but-open files. 15 min read 1 Read tutorial

root@vps: ~ $ screen -S aapanel$ bash install_panel_en.sh aapanelaaPanel: http://IP:port/entry Linux Server How to Install aaPanel on a VPS: aaPanel (BaoTa International) Installation and Security Guide Install aaPanel (BaoTa international) on a JUSTG VPS with the official script, open the panel port and secure the login with 2FA. 13 min read 1 Read tutorial

root@vps: ~ $ dig +short example.com A$ certbot --nginx -d example.com$ certbot renew --dry-run Linux Server Free SSL Certificate for Your Website: Host a Site with Nginx and Let's Encrypt (Certbot) on Linux Point DNS to your JUSTG server, set up Nginx on Debian/Ubuntu or Rocky, install a free Let's Encrypt SSL with certbot and force HTTPS. 12 min read 1 Read tutorial

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