Difference between revisions of "Network Connection Monitoring in Linux"
From Free Knowledge Base- The DUCK Project: information for everyone
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| − | + | === ss === | |
ss list out all connections. | ss list out all connections. | ||
ss -t tcp only. | ss -t tcp only. | ||
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ss -pnt tcp with hostnames not resolved, associated process id's using connection. <- very useful | ss -pnt tcp with hostnames not resolved, associated process id's using connection. <- very useful | ||
ss -s summary statistics | ss -s summary statistics | ||
| + | |||
| + | === netstat === | ||
netstat -natp show active Internet connections | netstat -natp show active Internet connections | ||
netstat -tupn | netstat -tupn | ||
| − | |||
| − | |||
View established connections and associated programs | View established connections and associated programs | ||
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continuously updated | continuously updated | ||
netstat -nputwc | netstat -nputwc | ||
| + | |||
| + | === tcpdump === | ||
| + | |||
| + | tcpdump -X -i eth0 | ||
| + | |||
| + | === lsof === | ||
View established connections and associated programs type TCP only | View established connections and associated programs type TCP only | ||
sudo lsof -nP -iTCP -sTCP:ESTABLISHED | sudo lsof -nP -iTCP -sTCP:ESTABLISHED | ||
| + | |||
| + | === ethtool === | ||
| + | |||
| + | To get information about your Ethernet interface, you can use: | ||
| + | ethtool eth0 | ||
| + | Replace eth0 with your actual interface name. | ||
| + | |||
| + | === iftop === | ||
| + | |||
| + | iftop is a real-time console-based network bandwidth monitoring tool. | ||
| + | sudo iftop | ||
Revision as of 15:56, 11 January 2024
ss
ss list out all connections. ss -t tcp only. ss -u udp only. ss -x unix only. ss -a -A udp report both "CONNECTED" and "LISTENING" sockets udp ss -nt tcp with hostnames not resolved. ss -ltn listening sockets only, tcp with hostnames not resolved. ss -pnt tcp with hostnames not resolved, associated process id's using connection. <- very useful ss -s summary statistics
netstat
netstat -natp show active Internet connections netstat -tupn
View established connections and associated programs
sudo netstat -atupen | grep ESTABLISHED netstat -nputw
continuously updated
netstat -nputwc
tcpdump
tcpdump -X -i eth0
lsof
View established connections and associated programs type TCP only
sudo lsof -nP -iTCP -sTCP:ESTABLISHED
ethtool
To get information about your Ethernet interface, you can use:
ethtool eth0
Replace eth0 with your actual interface name.
iftop
iftop is a real-time console-based network bandwidth monitoring tool.
sudo iftop
