vnstat
sudo systemctl start vnstat
sudo systemctl enable vnstat
sudo systemctl status vnstat
vnstat -d # 按天统计
vnstat -m # 按月统计
vnstat -l # 实时统计（类似 nload，但更简洁）
vnstat -i eth0
ethtool
sudo ethtool bond0
Settings for bond0:
Supported ports: [ ]
Supported link modes: Not reported
Supported pause frame use: No
Supports auto-negotiation: No
Supported FEC modes: Not reported
Advertised link modes: Not reported
Advertised pause frame use: No
Advertised auto-negotiation: No
Advertised FEC modes: Not reported
Speed: 50000Mb/s
Duplex: Full
Auto-negotiation: off
Port: Other
PHYAD: 0
Transceiver: internal
Link detected: yes