Oral  Brekke

Oral Brekke

1668578166

How to Check Listening Ports on Linux

Check Listening Ports on Linux

It is important to keep a check on network-related issues specifically while doing network troubleshooting. The first thing that needs to be checked is which ports are active and listening or what application is connected to your server. The listening port section on a network tells which process listens and serves as a communication endpoint. The state of the listening port can be opened, closed, filtered, or unfiltered.

Follow this article’s guide, if you are searching for commands to check listening port information on Linux.

How to Check Listening Ports on Linux

There are four easy and quick ways to get listening port information on the Linux system. Let’s check these practically:

  • 1: Listening Ports via Netstat Command 
  • 2: Listening Ports via ss Command
  • 3: Listening Ports via lsof Command
  • 4: Listening Ports via nmap Command

1: Listening Ports via Netstat Command

Network Statistics (netstat) is a command-line network monitoring and troubleshooting tool. It is used to manage the configuration of connections over the network. While using the netstat command on a Linux system, you would get complete information about TCP, UDP, incoming and outgoing connections, multicast memberships, routing tables, and port listening.

Run the mentioned command to list all ports using the netstat command:

$ sudo netstat -tunlp


The above flags describe the following:

t – for TCP ports

u – for UDP ports

n – for numerical addresses

l – to display listening ports

p – to display PIDs

2: Listening Ports via ss Command

The socket statistics (ss) is another way to print network socket information with additional details and statistics. It is a great alternative to netstat command with some similar functions.

You can execute the given command to listen ports on Linux:

$ sudo ss -tunlp

3: Listening Ports via lsof Command

As we know, everything in Linux and UNIX works as a filesystem. Whether it is a device or folder, you can call it a file. Some of these files are visible and some are hidden from us. The lsof (list of open files) command is a built-in command line tool used to display information about opened files.

We can execute the following command to list network files and port listening information on a Linux system:

$ sudo lsof -i

4: Listening Ports via nmap Command

The Network Mapper (nmap) is one of the most secure auditing tools to display network information. It is used by network experts for network discovery and listening ports.

The nmap is not a built-in tool in the Linux system, it can be installed using the following command in the terminal:

$ sudo apt install nmap

The following command would be used to display all open and listening ports of the Linux system:

$ sudo nmap -n -PN -sT -p- localhost

Conclusion

Listening ports are network ports on which the application or process listens on, or we can say that these are the communication endpoints. It is important for you to keep a check on network issues and what applications are connected to our network server. In the above guidelines, we have covered different ways to display the listening ports of our Linux system. We did it using command-line tools i-e, netstat, ss, nmap and lsof.

Original article source at: https://linuxhint.com/

#linux #check 

What is GEEK

Buddha Community

How to Check Listening Ports on Linux

Hire Dedicated Linux Developer

Looking to develop real-time applications?

Hire Dedicated Linux Developer from HourlyDeveloper.io, we have dedicated developers who have vast experience in developing applications for Linux and UNIX operating systems and have in-depth knowledge of their processes, kernel tools, internal architectures, and development packages.

Consult with experts:- https://bit.ly/2ZQ5ySP

#hire linux dedicated developer #linux developer #linux development company #linux development services #linux development #linux developer

Oral  Brekke

Oral Brekke

1668578166

How to Check Listening Ports on Linux

Check Listening Ports on Linux

It is important to keep a check on network-related issues specifically while doing network troubleshooting. The first thing that needs to be checked is which ports are active and listening or what application is connected to your server. The listening port section on a network tells which process listens and serves as a communication endpoint. The state of the listening port can be opened, closed, filtered, or unfiltered.

Follow this article’s guide, if you are searching for commands to check listening port information on Linux.

How to Check Listening Ports on Linux

There are four easy and quick ways to get listening port information on the Linux system. Let’s check these practically:

  • 1: Listening Ports via Netstat Command 
  • 2: Listening Ports via ss Command
  • 3: Listening Ports via lsof Command
  • 4: Listening Ports via nmap Command

1: Listening Ports via Netstat Command

Network Statistics (netstat) is a command-line network monitoring and troubleshooting tool. It is used to manage the configuration of connections over the network. While using the netstat command on a Linux system, you would get complete information about TCP, UDP, incoming and outgoing connections, multicast memberships, routing tables, and port listening.

Run the mentioned command to list all ports using the netstat command:

$ sudo netstat -tunlp


The above flags describe the following:

t – for TCP ports

u – for UDP ports

n – for numerical addresses

l – to display listening ports

p – to display PIDs

2: Listening Ports via ss Command

The socket statistics (ss) is another way to print network socket information with additional details and statistics. It is a great alternative to netstat command with some similar functions.

You can execute the given command to listen ports on Linux:

$ sudo ss -tunlp

3: Listening Ports via lsof Command

As we know, everything in Linux and UNIX works as a filesystem. Whether it is a device or folder, you can call it a file. Some of these files are visible and some are hidden from us. The lsof (list of open files) command is a built-in command line tool used to display information about opened files.

We can execute the following command to list network files and port listening information on a Linux system:

$ sudo lsof -i

4: Listening Ports via nmap Command

The Network Mapper (nmap) is one of the most secure auditing tools to display network information. It is used by network experts for network discovery and listening ports.

The nmap is not a built-in tool in the Linux system, it can be installed using the following command in the terminal:

$ sudo apt install nmap

The following command would be used to display all open and listening ports of the Linux system:

$ sudo nmap -n -PN -sT -p- localhost

Conclusion

Listening ports are network ports on which the application or process listens on, or we can say that these are the communication endpoints. It is important for you to keep a check on network issues and what applications are connected to our network server. In the above guidelines, we have covered different ways to display the listening ports of our Linux system. We did it using command-line tools i-e, netstat, ss, nmap and lsof.

Original article source at: https://linuxhint.com/

#linux #check 

How I Switched from Windows 10 to Linux Mint

This article is all about my journey on switching from Windows 10 to Linux Mint 20, how I got easily adapted to the Linux environment, and some resources that helped me to set up a perfect Desktop environment.

Uncertainty

Ok, now I have decided to switch to Linux but here comes the first question. Which distro will satisfy my needs both in terms of GUI and other aspects? Linux is not something new to me since I have been working with RHEL based distros in my work for the past 4 years with the command-line.

I know RHEL based distros are good for enterprises but not for personalized desktop environments, at least that’s what I am thinking till now. So I started my research to find the distro that should be easy for me to use and at the same time should have good community support if in case I ran into some problem. Among many Linux distros, I drilled down my list to 4 flavors.

Related ArticleThe Best Linux Distributions for Beginners

Before deciding the Distro it is necessary you formulate the list of tools/programs or packages needed and check if the distro you choose provides all those features.

For me, I use Linux for two main purposes: one is for my professional development work, writing articles, and second for my personal use like Video editing and Movies. Most of the popular software are created to be compatible with Windows, macOS, and Linux like Sublime TextVSCodeVLC Media PlayerFirefox/Chromium browser. Other than these software, cloud-based services make our life easy Like Microsoft Office 365 or G Suite.

#linux distros #linux mint #linux distros #linux mint tips #linux

Android App to iOS App Porting Services in Virginia, USA | SISGAIN

Want to port your android app to IOS ? The Android to iOS portion can be easy with SISGAIN. Our android to ios porting services make it easier to port android apps to iOS in Virginia, USA. With our remote team you can port your app today. Our dedicated android to iOS Porting developers will help you to run your business smoothly without any hassle. For more information call us at +18444455767 or email us at hello@sisgain.com

#android to ios porting #port android app to ios #porting android to ios #android to ios porting #android app to ios app porting in usa #dedicated android to ios porting developers

I am Developer

1620616862

How to Delete Directories and Files in Linux using Command Line

In this remove or delete directories and files linux tutorial guide, you will learn how to remove empty directory and non empty directory linux using command line. And as well as how to remove/file files linux using command line.

If you work with Linux then you will need the following:

  • how to remove empty directory in linux,
  • how to remove non empty directory,
  • how to remove directory without confirmation linux
  • how to remove files with and without confirmation in linux.

So, this tutorial guide will show you you how to use the rmunlink, and rmdir commands to remove or delete files and directories in Linux with and without confirmation.

https://www.tutsmake.com/how-to-remove-directories-and-files-using-linux-command-line/

#how to delete directory in linux #how to remove non empty directory in linux #remove all files in a directory linux #linux delete all files in current directory #linux delete all files in a directory recursively #delete all files in a directory linux