SCP Linux – Securely Copy Files Using SCP examples

This post includes SCP examples. SCP or secure copy allows secure transferring of files between a local host and a remote host or between two remote hosts. It uses the same authentication and security as the Secure Shell (SSH) protocol from which it is based. SCP is loved for its simplicity, security and pre-installed availability. […]

Linux Performance: Almost Always Add Swap. Part 2: ZRAM

Previously, we looked at how swap space, particularly swapping, can severely slow down Linux performance. We then tweaked Linux kernel parameters to better use server memory and avoid heavy swapping. That article created some debate and good arguments for and against swap space. For example, if you have more than enough memory available, wouldn’t it […]

Using the find command in Linux with examples

This find command guide is a follow-up of my previous 90 Linux Commands frequently used by Linux Sysadmins article. Every week, or as time allows, I will publish articles on the ~ 90 commands geared toward Linux sysadmins and Linux power users. Let’s continue this series with the find command. The find command is part of findutils which […]

Nginx tuning tips: TLS/SSL HTTPS – Improved TTFB/latency

Since 30th June 2018, the PCI Security Standards Council has required that support for SSL 3.0 and TLS 1.0 be disabled and, more recently, to disable TLS 1.1. Using TLS 1.2 and 1.3 is strongly recommended. In addition, as of July 2018, Google Chrome began to mark ‘HTTP’ websites as “not secure.” Over the past […]

PHP 8: Only 3% installed it. Here’s why.

This morning, I read a comment by one of our online community members discussing some of the reasons behind the slow adoption of PHP 8. One member stated that it’s due to PHP compatibility issues across new releases. In contrast, another put it down to the fact that important software/frameworks did not support PHP 8 […]

78% of the web powered by PHP (3% on PHP 8)

Today, PHP is used by almost 78% of all the websites whose server-side programming language we know. Popular websites such as Slack, Etsy, Wikipedia, WordPress, Mailchimp, Canva, Indeed, Investing.com, and others are powered by PHP. However, in the coming months, many websites that fail to upgrade to the latest version of PHP 8 will be […]

Observability: 15 Industry-Leading Companies Discuss its Evolution

In this article, you’ll find recent commentary from executives and decision-makers of industry-leading observability providers on two key questions regarding the evolution of observability. Published: May 17th, 2021 | Updated: May 6th, 2022 The observability cloud continues to expand and evolve rapidly. Over the past year, millions of workers left their offices to work from […]

Kali Linux non-root and no pen-test tools install w/ screenshots

April 12th update: Thankfully, as of 2020.1, Kali Linux has swapped to a privileged non-root user by default. You will now log in with the user you create during the install process and no longer as root. This means you can now accomplish my recommended setup (a stable non-root Debian-testing rolling release, managed by the […]

Apache Performance: Disable .htaccess

Back in 2013, I searched the web for a performance article which I could forward to a client of StackLinux. One that explained how using WordPress Cache plugins that use .htaccess is almost always slower than plugins that don’t use it. Surprisingly, that search took longer than expected. I finally found this article, where Martin, […]