iftop

Monitor real-time network bandwidth usage on a specific interface.

brewmacoslinux
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Source

About

Display an interface's bandwidth usage

Commands

iftop

Examples

show network traffic on default interface$ iftop
monitor bandwidth on specific network interface$ iftop -i en0
display network traffic without reverse DNS lookups$ iftop -n
monitor network traffic and show ports for connections$ iftop -P
filter network traffic to show only specific host$ iftop -i en0 -f 'host 192.168.1.100'