ifstat

View network interface statistics since last query

$ ifstat

$ ifstat -a

$ ifstat -e

ifstat [options] [interface]

ifstat reports network interface statistics in a format similar to vmstat or iostat. It displays incoming and outgoing traffic rates for network interfaces, updating periodically.
The tool reads from /proc/net/dev and calculates rates based on the difference between measurements. By default it shows traffic since the last query, but can show cumulative statistics since boot.

-a, --ignore

Show statistics since boot rather than since last query

Show error rate statistics

Don't display header

Set the update interval in seconds

Specify delay before first measurement

Statistics depend on kernel interface counters. Very high traffic rates may overflow 32-bit counters on older systems. Different versions of ifstat exist with slightly different options.

ifstat was developed as a simple network monitoring tool following the Unix philosophy of doing one thing well. It provides network statistics in a format consistent with other system statistics tools like vmstat.

ip(8), netstat(8), iftop(8)