iftop

Live bandwidth per connection

low risk

interactive breakdown — edit the command and press Explain
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What it does

Top-like view of network usage. See the flags and examples below, and run `man iftop` for the full reference.

Common flags
FlagMeaning
-iInterface
-nNo DNS
-PShow ports
Examples
iftop -nP -i eth0Bandwidth by connection · explain & risk-check →
Related
nethogs ss
Open the full explainer →More in Networking

Reference text is hand-written and may be incomplete — check man iftop for your version. Test destructive commands on a non-production system first.