See Interface Speed and Duplex

Is there a method to see connection speed, duplex, etc. without installing ethtool?

I'm running version 22.03.5.

Have a look at the sysfs files in /sys/class/net/. On my DSA device, I get one directory for every port and files like speed and duplex. Some information can also be gathered from ip addr, especially the speed in the qlen field.

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