Showing headlines posted by linuxnix

If you are familiar with cyber security stuff, you must have heard about kali linux. Kali linux is a operating system developed by offensive security and it was specifically targeted for penetration testers. In this guide, we will see how to install this operating system in a virtual environment.

Do you know that you can monitor what the users are doing in your Linux servers? Acct is an open source application that you can use for this task. This tool comes with the functionality of running in the background and tracking user activity.

Do you ever wonder how to keep up with the new security updates releasing daily? Debsecan is a great tool that you can use to simplify this task. This utility will help you to evaluate your current security status without searching for the new security updates manually. And also it comes with the feature to report the missing security updates. Most importantly, it will let you know if there’s any known vulnerabilities exists in the already installed programs.

If I ask you how to send an email, what would you say? You will say go to gmail or yahoo mail and send the email. But, do you know that you can send emails using your Linux command line? Yes! you heard me right.

we will go deep into the functionalities and understand all the different features of Jenkins. Let’s get started. Developers make commits in the source code. Jenkins polls and detects code at every interval. If there are any commits, Jenkins will start the build using any of the build tools integrated into the code...

Now that we have understood the question – WHY do I require to move my data to AWS? Still some things are not clear as the first post is all about cloud and what Amazon AWS can do for you. In this post we will see

To understand AWS, we need to understand the basics of Cloud Computing first. Let us take you through Cloud definition and need of Cloud computing and then we will figure out how AWS fits into role of Cloud Computing.

What you should know about ls command in Linux? Just going to start Linux basics? Then you should not miss “ls command” which have all ingredients of Linux basics. In order to understand ls command output you should know following stuff.

Docker is basically a concept of creating a light weight ‘Virtual Machines’ within a Linux Machine by just creating a single process in it. The real meaning of a Docker is “person who load and unload the containers from a ship’.

What is Puppet? The puppet is a configuration management tool used by system administrators and devops engineers to build and configure IT infrastructure. To understand it we should know a bit of history about how information technology evolved.

It is important to understand ports, their details and their numbers.

Q. What is a port?

A port is piece of software which is used as docking point in your machine, where remote application can communicate. This is analogy to the physical ports for entering in to a country from different sea ports.

I'm astonished all the time when I see the FTP package name. vsftpd which abbreviated to Very Secure File Transfer Demon(vsftpd). But when we see the security prospective of this package there is not much security included with this package. I mean when you login to server the credentials are transferred in plain text. This is the reason by default root user is not allowed to login to ftp server. To eliminate transferring data/user credentials in plain text and to encrypt the entire transmission we can take help from openssl to generate a certificate and use SSL certificate when communicating with FTP server.

Ansible is a great and simple configuration management and orchestration tool. Some times we require to reboot server and do some tasks once reboot is done. Today I came across such requirement where I have to upgrade our production Ubuntu server...

Many people know about cat command which is useful in displaying entire file content. But in some cases we have to print part of file. In today’s post we will be talking about head and tail commands, which are very useful when you want to view a certain part at the beginning or at the end of a file, specially when you are sure you want to ignore the rest of the file content.

Q. How can I check if my server is running on a 64 bit processor and running 64 bit OS or 32 bit operating system?

Command chaining is a concept to execute two or more commands in one execution to increase.

A path is a unique location to a file or a folder in a file system of an OS. A path to a file is a combination of / and alpha-numeric characters.

Today I came across a requirement to copy couple of files and change permissions to execute those files when writing some ansible playbooks. We can do this by using cp, chmod, chown command as shown below. Ownership is changed from root user to normal user surendra.

FTP stands for File Transfer Protocol. It was written by Abhay Bhushan and published in 1971. FTP is supported by all the operating systems and browsers.

This is our 6th post on understanding first level directories in /. Knowing these folders in detail or at least what each is meant for will help you understand Linux/Unix in whole...