Showing posts with label UDP. Show all posts
Showing posts with label UDP. Show all posts

Saturday, January 21, 2023

Error binding socket to :::25, status = EADDRINUSE (Solved)

Centos 
$ yum install net-tools 

Fedora: 
$ sudo dnf install net-tools 

Debian, Ubuntu: 
$ sudo apt install net-tools

netstat -tulpn

netstat -tulpn | grep -w 2500

Result: tcp     0         0 0.0.0.0:2500             0.0.0.0:*

kill 942

Wednesday, August 10, 2022

How to check TCP, UDP Domain Socket using NetCat

 Install the netcat Using the fllowing command:

$ yum install nc      [On CentOS/RHEL]

$ dnf install nc      [On Fedora 22+ and RHEL 8]

$ sudo apt-get install Netcat      [On Debian/Ubuntu]


NetCat commands:

$ nc -v -w 2 z 192.168.56.1 22     #scan a single port

OR

$ nc -v -w 2 z 192.168.56.1 22 80  #scan multiple ports

OR

$ nc -v -w 2 z 192.168.56.1 20-25  #scan range of ports

How to merge a branch to main branch in Github.

In Terminal or Command Prompt:  git checkout main  [switch to main branch] git pull origin main  [grab latest updates from main branch] git ...