linux (3)

๐Ÿ” Secure SSH Connections in 2025

In the past, SSH connections were commonly secured using RSA keys. But as of 2025, that algorithm is considered outdated. The modern alternative is ed25519 โ€” a compact, fast, and secure cryptographic algorithm thatโ€™s now widely adopted. ๐Ÿ›  Generating an ed25519 Key Open your terminal…

๐Ÿ› ๏ธ How to Update Ubuntu Server

โœ… One-liner: sudo apt update && sudo apt upgrade -y && sudo apt full-upgrade -y && sudo apt autoremove -y && sudo apt autoclean ๐Ÿ” Details: 1. Start with the basic update command: sudo apt update && sudo apt upgrade -y This updates: 2. Update…

How to connect to a server via SSH

๐Ÿ”ง What you need: โธป Instruction: โธป ๐Ÿ”‘ If youโ€™re using an SSH key: If you have a private key (e.g., id_rsa or id_ed25519), use: ssh -i /path/to/private_key username@server_ip Example: ssh -i ~/.ssh/id_ed25519 root@192.168.1.100