🛠 Ethernet Gigabit et accès SSH

Objectives

Configure the ODROID-M1 as a headless server: Gigabit Ethernet (Realtek RTL8211F transceiver on GMAC RGMII) followed by SSH connection from another machine. Note: the board has no built-in WiFi/BT (confirmed by all datasheets) — an RJ45 cable is mandatory, or a Hardkernel USB WiFi dongle.

Hardware

• ODROID-M1 running Armbian, Cat5e Ethernet cable, box/router
• Optional keyboard, or serial console on the dedicated UART header
• Optional HDMI 2.0 monitor for the first boot

Complete code

# Sur la carte (première connexion locale) :
ip -br a                                  # interface end0 ou eth0
sudo nmtui                                # ou éditer /etc/network/interfaces

# Vérifier le lien Gigabit (et non 100 Mb/s) :
sudo ethtool end0 | grep -E 'Speed|Link'

# Créer un utilisateur et activer SSH
sudo adduser projet
sudo systemctl status ssh

# Depuis le PC :
ssh projet@odroid-m1.local

# Copier des fichiers à pleine vitesse (~100 Mo/s sur GbE) :
scp rapport.txt projet@odroid-m1.local:~/

Expected verification

ip -br a displays an address in 192.168.x.x; ethtool indicates “Speed: 1000Mb/s”; the SSH connection succeeds and scp transfers files.

Common errors

• Looking for a wlan0 interface: there is no built-in WiFi on the M1, only wired (or USB dongle).
• Link stuck at 100 Mb/s: defective Cat5 cable or old switch.
• .local name not found: install avahi (apt install avahi-daemon).
• Getting banned by fail2ban by retrying a wrong password without an SSH key.
• Undersized power supply causing disconnections: use the recommended 12 V/2 A.