iftop
man iftop
iftop listens to network traffic on a named interface, or on the first interface it can find which looks like an external interface if none is specified, and displays a table of current bandwidth usage by pairs of hosts.
example
"How much bandwidth are users wasting trying to figure out why the network is slow?"
Quelle: man iftop
iftop -i enp0s3 -f "icmp and host heise.de"
-f # filter, see man pcap-filter, same as used by tcpdump
-i # interface
jnettop
man jnettop
jnettop captures traffic coming across the host it is running on and displays streams sorted by bandwidth they use. Result is a nice listing of communication on network by host and port, how many bytes went through this transport and the bandwidth it is consuming.
example
jnettop -i wlp3s0 -x "icmp and host heise.de"
-x # _expression_ aka filter, see pcap-filter, same as used by tcpdump
-i # interface
nethogs
man nethogs
NetHogs is a small 'net top' tool. Instead of breaking the traffic down per protocol or per subnet, like most such tools do, it groups bandwidth by process - and does not rely on a special kernel module to be loaded. So if there's suddenly a lot of network traffic, you can fire up NetHogs and immediately see which PID is causing this, and if it's some kind of spinning process, kill it.
MalTrail
https://github.com/stamparm/MalTrail
curl
https://www.tecmint.com/test-website-loading-speed-in-linux-terminal/
bmon ***
Description: portable bandwidth monitor and rate estimator bmon is a commandline bandwidth monitor which supports various output methods including an interactive curses interface, lightweight HTML output but also simple ASCII output.
.
Statistics may be distributed over a network using multicast or unicast and collected at some point to generate a summary of statistics for a set of nodes.
https://www.howtogeek.com/664589/how-to-use-bmon-to-monitor-network-bandwidth-on-linux/
https://www.linuxjournal.com/content/queueing-linux-network-stack ***
bpfmon **
https://github.com/bbonev/bpfmon
vnstat ***
console-based network traffic monitor
vnStat is a network traffic monitor for Linux. It keeps a log of daily network traffic for the selected interface(s). vnStat is not a packet sniffer. The traffic information is analyzed from the /proc filesystem, so vnStat can be used without root permissions.
iptraf-ng
http://iptraf.seul.org/2.2/manual.html
ifstat
https://www.redhat.com/sysadmin/ifstat-network-statistics
iperf3
https://www.redhat.com/sysadmin/network-testing-iperf3 **
netstress.deb
..
nload (and dstat)
https://www.linux-magazin.de/ausgaben/2020/02/einfuehrung-2-22/
https://www.redhat.com/sysadmin/beginners-guide-network-troubleshooting-linux
OpenNMS
OpenNMS is an open source solution that helps you visualize and monitor everything on your local and remote networks. It offers comprehensive fault, performance, traffic monitoring, and alarm generation in one place. Highly customizable and scalable, OpenNMS easily integrates with your core business applications and workflows.
More tools
http://xmodulo.com/useful-command-line-network-monitors-linux.html (lesenswert)
https://www.tecmint.com/linux-network-bandwidth-monitoring-tools/ **
https://www.sunnyvalley.io/docs/network-basics/network-optimization *** theory of network performance
|=| Werner Heuser
|=| gpg: https://keybase.io/wehe00
|*| This is no time for phony rhetoric -- Lou Reed
Von: "Jeroen Baten via lpi-examdev" <[email protected]>
An: [email protected]
Cc: "Jeroen Baten" <[email protected]>
Betreff: Re: [lpi-examdev] Objectives LPIC-2 Exam 201 Version 5.0 Discussion
Well, iotop and iostat measure io, as the name sort of implies.
They are therefore not tools to measure network performance.
iptraf is the (almost) only tool mentioned to measure
network performance, are there other or even better tools?
`iotop` and `iostat` where referenced for LPIC-2-v4.5.
-- Jeroen Baten | EMAIL : [email protected] ____ _ __ | web : www.i2rs.nl | )|_)(_ | tel : +31 (0)648519096 _|_/_| \__) | Frisolaan 16, 4101 JK, Culemborg, the Netherlands_______________________________________________ lpi-examdev mailing list [email protected] https://list.lpi.org/mailman/listinfo/lpi-examdev
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