neofetch: Awesome system info bash script that supports Linux, MacOS, and Unix-like systems

Posted on in Categories Command Line Hacks, Howto last updated April 26, 2017

The neofetch command written in a bash shell. The main purpose of neofetch is to be used in screenshots to display other users what operating system or Linux distro you are using including theme, icons and more. This command shows info about your system next to an image, your operating system logo and other info. Neofetch version 3.1.0 has been released. Let us see how to install the latest version and use it.
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ssh_scan: A SSH configuration and policy scanner for Linux and UNIX server

Posted on in Categories Security last updated April 26, 2017

The SSH (“Secure Shell”) protocol is a method for secure remote login from one system to another. Sysadmins and users use a secure channel over an unsecured network in a client-server architecture format for connecting an SSH client with an SSH server. Security ssh server is an important task. There is a tool called ssh_scan from Mozilla which act as a prototype SSH configuration and policy scanner for your SSHD.

Eyegasm: 5 awesome Linux/Unix desktop customization that will blow your mind

Posted on in Categories Hardware, Open Source last updated April 21, 2017

Everyone loves the desktop operating system. People customize their Linux or Unix desktop with themes, wallpapers, killer configuration and more. These customizations show you how cool your desktop can be!
awesome Linux/Unix desktop customization that will blow your mind

How to use parallel ssh (PSSH) for executing ssh in parallel on a number of Linux/Unix/BSD servers

Posted on in Categories Cloud Computing, Command Line Hacks, Howto last updated April 21, 2017

Recently I come across a nice little nifty tool called pssh to run a single command on multiple Linux / UNIX / BSD servers. You can easily increase your productivy with this SSH tool.

More about pssh

pssh is a command line tool for executing ssh in parallel on some hosts. It provides specialties includes:

  1. Sending input to all of the processes
  2. Inputting a password to ssh
  3. Saving output to files
  4. IT/sysadmin taks automation such as patching servers
  5. Timing out and more

Let us see how to install and use pssh on Linux and Unix-like system.

pssh-welcome

9 Awesome Open Source Web Performance Software For Linux and Unix-like Systems

Posted on in Categories Open Source last updated February 4, 2017

Web performance is nothing but the speed in which web pages are downloaded and displayed on the user’s web browser. Faster website speeds have been shown to increase sales or increase visitor loyalty including user satisfaction. Particularly useful for those use slow internet connections or on mobile phones/tablets. You can increase the speed of page load using:

  1. Server side cache
  2. Browser side cache
  3. Faster disks
  4. Image optimization
  5. Web application accelerator focusing on optimizing caching and compression
  6. Load balancing and SSL offloading
  7. Geo or DNS-based load balancing and more.

In short, one can increase the time it takes for pages to render using multi-layered cache and asynchronous communication with server-side components. In this post, I will list my favorite open source software based TCP/HTTP load balancer and proxying solution for web performance.

7 Awesome Open Source Analytics Software For Linux and Unix-like Systems

Posted on in Categories Open Source last updated January 16, 2017

Web analytics is nothing but the measuring web traffic. It is not limited to measuring web traffic. It includes:

  1. Analysis
  2. Data collection
  3. Reporting of web data for purposes of understanding and optimizing web pages

Google Analytics is the most widely used cloud-based web analytics service. However, your data is locked into Google Eco-system. If you want 100% data ownership, try the following open source web analytics software to get information about the number of visitors to your website and the number of page views. The information is useful for market research and understanding popularity trends on your website.

Accessing Internet from cloud VM when you have only private network enabled

Posted on in Categories Hardware, Howto last updated August 17, 2016

We have a couple of virtual servers hosted with Softlayer for processing data and backup purpose. The public interface is completely turned off i.e. no Internet access. We can only access VMs using a VPN. It resulted in decreased costs and many security problems for backend servers. However, when you order “Private Network Only” cloud VM, you cannot route outgoing traffic to the Internet using your VM.

Book Review: Tarsnap Mastery Online Backup For the Truly Paranoid

Posted on in Categories Amazon Web Services, Cloud Computing, Reviews last updated January 4, 2016

Tarsnap Mastery: Online Backups for the Truly Paranoid (IT Mastery) It’s always a good idea to keep backups of all of your data in multiple places. Every Linux or Unix sysadmin must master the art of backups if you want to keep your data forever. Most sysadmin recommend and follows the 3-2-1 rule:

  1. At least three copies of data.
  2. In two different formats.
  3. With one of those copies off-site.

Tarsnap is one of such off-site backup sites. It’s a secure online backup system for UNIX-like system. This service encrypts and stores data in Amazon S3. To use Tarsnap perfectly and feel secure about your backups, you need the “Tarsnap Mastery” book by Michael W. Lucas. It is no secret that I’m a big fan of his book series. Let’s see what the book is all about.