Torna alla Documentazionevnstat: Historical Bandwidth Consumption
vnstat records traffic over time and allows you to see how many GB you've consumed per day, week, or month. Perfect for keeping track of monthly traffic included in your plan.
Installation
apt install vnstat -y # Debian/Ubuntu
dnf install vnstat -y # CentOS/AlmaLinux
systemctl enable --now vnstat
Usage
# General summary
vnstat
# Hourly traffic (last 24 hours)
vnstat -h
# Daily traffic
vnstat -d
# Weekly traffic
vnstat -w
# Monthly traffic
vnstat -m
# Continuous update every 5 seconds
vnstat -l
# Specify the interface (e.g., eth0, ens3)
vnstat -i eth0 -m
Find Your Network Interface Name
ip link show
# or
vnstat --iflist
iftop: Real-time Traffic per Connection
iftop shows active connections and their bandwidth consumption in real-time. Useful for quickly understanding who's using lots of bandwidth.
apt install iftop -y
# Start (requires root)
iftop
# On specific interface
iftop -i eth0
# Show ports
iftop -P
Useful keys inside iftop:
- n: show/hide DNS resolution
- p: show/hide ports
- s: sort by source
- d: sort by destination
- q: exit
nethogs: Traffic per Process
nethogs associates network traffic with individual processes or applications. Ideal for understanding which program is consuming bandwidth.
apt install nethogs -y
nethogs
nethogs eth0 # On specific interface
Example output:
NetHogs version 0.8.7
PID USER PROGRAM DEV SENT RECEIVED
1234 www-data nginx eth0 1.2 MB 0.3 MB
5678 root sshd eth0 0.1 MB 0.0 MB
nload: Real-time Speed per Interface
nload shows current upload and download speed with a graphical bar:
apt install nload -y
nload
Quick Check Without Additional Tools
If you don't want to install anything:
# Traffic on interface every second (RX = received, TX = sent)
watch -n 1 cat /proc/net/dev
# Active connections and count per IP
ss -tn | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -rn | head -20
# How many connections per state (ESTABLISHED, TIME_WAIT, etc.)
ss -tan | awk '{print $1}' | sort | uniq -c | sort -rn
Check Total Bandwidth Consumption
If your plan has a monthly traffic limit, you can monitor it with vnstat:
# Current month's traffic
vnstat -m | grep "$(date +%Y-%m)"
The VirtFusion panel also shows traffic graphs over time in the Graphs section. See: Statistics and Graphs
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