Difference between revisions of "Network Utils"
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=== how to tell if port 80 is listening? What is listening on a particular port? === | === how to tell if port 80 is listening? What is listening on a particular port? === | ||
| + | |||
netstat -plnt | netstat -plnt | ||
| + | netstat -tunlp | ||
| + | |||
lsof -nP -i4TCP:$PORT | grep LISTEN | lsof -nP -i4TCP:$PORT | grep LISTEN | ||
lsof -i:1433 | lsof -i:1433 | ||
Revision as of 19:25, 28 December 2023
Contents
network traffic by-process
sudo tcpdump -k NP | grep Sublime
check that a node is pingable in bash
while ! ping -c1 bjjc_spec_22.ubuntu14 &>/dev/null; do :; done ;
how do I know if the system trusts the certificate?
you use curl
how to tell if port 80 is listening? What is listening on a particular port?
netstat -plnt netstat -tunlp
lsof -nP -i4TCP:$PORT | grep LISTEN lsof -i:1433
netstat -an -ptcp | grep LISTEN
Port Forward
ncat --sh-exec "ncat 10.0.1.117 22" -l 2289 ssh -L 8080:127.0.0.1:8080 -L 8081:127.0.0.1:8081 developer@133.111.111.111
What's running on my ports?
sudo netstat -ltnp netstat -anp | grep :443 | grep LISTEN
or
lsof -i -P -n | grep LISTEN
Rename a wireless interface
ip link set wlp5s0 name wlan0
Security
List nodes in the network:
sudo arp-scan -l --interface=wlan0
This is better than wireshark and tcpdump:
ngrep port 3000 ngrep -d any -W byline port 5000
