Answers for "check open ports on ubuntu"

39

linux how to see ports in use

# Any of the following
sudo lsof -i -P -n | grep LISTEN
sudo netstat -tulpn | grep LISTEN
sudo lsof -i:22 # see a specific port such as 22
sudo nmap -sTU -O IP-address-Here
Posted by: Guest on March-31-2020
4

check all running ports ubuntu

sudo lsof -i -P -n | grep LISTEN
sudo netstat -tulpn | grep LISTEN
sudo ss -tulpn | grep LISTEN
sudo lsof -i:22 ## see a specific port such as 22 ##
sudo nmap -sTU -O IP-address-Here

# Source
https://www.cyberciti.biz/faq/unix-linux-check-if-port-is-in-use-command/
Posted by: Guest on June-05-2021
6

see what is using a port ubuntu

$ sudo lsof -i:22
Posted by: Guest on February-19-2021
8

how to check list of open ports in linux

sudo lsof -i -P -n | grep LISTEN
sudo netstat -tulpn | grep LISTEN
sudo lsof -i:22 # see a specific port such as 22
sudo nmap -sTU -O IP-address-Here
Posted by: Guest on May-05-2020
5

linux see used ports

netstat -tulpn
Posted by: Guest on September-23-2020
0

ubuntu open all port

sudo ufw allow 1:9999/tcp
Posted by: Guest on January-21-2021

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