Netstat is a command line tool that is used to view and monitor network statistics and configurations of a system. This tool is available on both Unix, Linux and Windows NT-based operating systems. Below are some of the activities that [...]
Netcat (nc) command is a powerful tool to analyze network connections, scan for open ports, transfer data etc. It is a networking utility for reading from and writing to network connections using TCP or UDP protocols. How to install netcat [...]
In Linux or Unix-like operating system, the '/etc/passwd' file stores all user information. This file contains the normal (regular) and system users. In this tutorial, I will show you how to list users in Linux using the command line. The [...]
Occasionally, we may need to check out the default port number of specific services/protocols or services listening on certain ports on Linux. A number of command line tools are available to help you search port names and numbers in your [...]
In this article, we'll focus on how you can browse the internet from Linux command line using text-based browsers. Text browsers are browsers that only render the text contents of a web page, leaving out all the graphical content including [...]
Sometimes, as you go about running commands on a Linux terminal, you may feel that the terminal is somewhat 'filled up' with commands and outputs of those commands. Therefore, you may want to clear the terminal to declutter it and [...]
This guide is meant to help you identify a package that owns/provides a specific file on your Ubuntu system. All commands on this article have been tested on Ubuntu 18.04 and Ubuntu 16.04 Desktop and Server edition. Sometimes it is [...]
Tcpdump is a network troubleshooting command which is also known as a packet sniffer is used to capture and display packets from a network. Tcpdump allows users to capture and display TCP/IP and other packets being transmitted or received over [...]
Tar is a command line tool used to create and manipulate archive files in Linux and Unix systems. Tar command creates .tar archive file and then compress using gzip or bzip2. You can create a single archived compressed file using [...]
When the system is heavily used, it would be a big challenge for system administrators to manage resources. Ulimit (user limit) is a powerful command which helps to limit resources on your system. Sometime, but not very often a single [...]
In this article, we'll dive deep and see how we can upgrade specific packages in Ubuntu/CentOS distributions. Once in a while, you may be required to upgrade certain packages and leave others in their default versions. One reason for this [...]
Aliases are very useful when it comes to fast working in Linux. We can use alias to run a long or hard remember command with a simple word. There are two types of aliases – temporary and permanent. In this [...]
DUtree is a combination of Durep and Tree. Durep creates disk usage reports with graphs which allows us to identify which directories are using the most space. Although durep can produce text output similar to du, its real power is the [...]
Have you been wondering how you can find an execution time of a process in Linux or Unix system?. This guide will show you a number of tools which comes in handy when trying to find execution time of a [...]