ethtool
SafeNIC link diagnostics
ethtool <iface>
Shows link speed, duplex and state. Essential when a 1G port negotiates at 100M, etc.
Examples
ethtool eth0 | grep -E 'Speed|Duplex|Link'Check speed and link
Syntax
ethtool [-s] <iface>
Before you run it
Changing settings with -s drops the link.
Related commands
- ip addrShow IP/routes
- nmcliManage NetworkManager
- show interfacesInterface details/errors
The same reference, with no signal at all
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