Book Review: Relayd and Httpd Mastery

Posted on in Categories Reviews last updated May 19, 2017

httpd-bookThe httpd server is a web server with FastCGI and TLS support. The relayd is a free and open source load-balancer and web-proxy server. One can use httpd and relayd to run a static website, blog, a PHP base application and so on using OpenBSD, FreeBSD, TrueOS, and HardenedBSD operating system. The book “Relayd and Httpd Mastery” talks about web server, distribute traffic between backends, running dynamic web sites, php based web apps, securing and optimizing web server, LibreSSL based modern cryptography library, TLS/SSL support and load-balancing your web traffic across multiple servers.

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

Posted on in Categories Command Line Hacks, Howto last updated May 7, 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.

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

PSA: Intel Atom C2000 Chips Flaw Bricking Routers/NAS/Firewall devices that are powered by Linux, pfSense and FreeNAS

Posted on in Categories Hardware last updated February 7, 2017

Intel’s Atom C2000 chips are bricking products, and it’s not just Cisco hit. From the theregister:

Intel’s Atom C2000 processor family has a fault that effectively bricks devices, costing the company a significant amount of money to correct. But the semiconductor giant won’t disclose precisely how many chips are affected nor which products are at risk. Coincidentally, Cisco last week issued an advisory warning that several of its routing, optical networking, security and switch products sold prior to November 16, 2016 contain a faulty clock component that is likely to fail at an accelerated rate after 18 months of operation.

Intel has “Silvermont” which is a microarchitecture for low-power Atom, Celeron and Pentium branded processors used in systems on a chip (SoCs) made by Intel. It includes:

  1. Avoton – SoCs for micro-servers and storage devices.
  2. Rangeley – SoCs targeting network and communication infrastructure.

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

Posted on in Categories Open Source last updated May 7, 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 May 7, 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.