A quick solution to the warning “Could not increase number of max_open_files to more than” when starting MySQL or MariaDB. For some background read How MySQL Opens and Closes Tables. Here’s an excerpt: “The table_open_cache and max_connections system variables affect the maximum number of files the server keeps open. If you increase one or both of these […]
Enable Automatic Updates – Fedora/Red Hat/CentOS + Bonus Tip
November 14, 2019 by Hayden James, in Blog LinuxAs a reminder, Red Hat Enterprise Linux is based on Fedora Linux and CentOS is a 100% compatible rebuild of Red Hat Enterprise Linux. With that out of the way, lets move on. Linux server security is crucial to Linux server administration. Part of keeping Linux servers secure, is to install security updates shortly after they […]
Choosing the right infrastructure technology for your application
October 30, 2019 by Jason Abate CEO of Panopta, in Blog GuestsYour infrastructure is the backbone of your application; knowing what works best for the application you’re running is the first step towards an efficient application and costs which fit your budget. With an ever-growing number of new infrastructure options, it can be hard to choose the best option for your application, and it often requires […]
How To Create Optimized Docker Images For Production
October 23, 2019 by Adnan Rahić, in Blog GuestsOptimizing Docker images is a tricky feat. You have a lot to learn, with numerous things that can go wrong. Ask Matthew McConaughey from Interstellar. “Anything that can go wrong, will go wrong.” – Murphy, a smart dude You want to have a quick feedback loop between pushing code to your GitHub repository and deploying […]
How to Enable Unattended Upgrades on Ubuntu/Debian
September 30, 2019 by Hayden James, in BlogLinux server security is of critical importance to sysadmins. One central part of keeping Linux servers secure, is by installing security updates in a timely manner. Too often there are compromised servers on the internet due to pending security updates waiting for a manual update. On both Ubuntu and Debian, the unattended-upgrades package can be configured […]
59 Linux Networking commands and scripts
September 30, 2019 by Hayden James, in Blog LinuxToday, I wanted to test network throughput via command line with at least 3 tools. For the life of me, I could not remember iperf. We can all relate. It was a bit frustrating, so I decided to create a network tools go-to-list for myself. Then, I thought, why not turn the list into a […]
How to Set Up an Nginx Certbot
September 25, 2019 by Samuel Bocetta, in Guests LinuxIf you are looking to automate the process of obtaining, installing, and updating TLS/SSL certificates on your web server, then Let’s Encrypt is a very useful tool. It is a certificate authority (CA) that comes packaged with a corresponding software client, Certbot, that will automatically install TLS/SSL certificates. This means that you can run encrypted HTTPS […]
I asked 12 APM companies about the future of APM, here’s what they said
July 29, 2019 by Hayden James, in Blog LinuxApplication Performance Monitoring (APM) first started in the late 1990s with companies such as Precise (acquired by Symantec, spun off and then acquired by Idera), Wily Technology (acquired by CA Technologies) and Mercury Interactive (acquired by HP Software Division). In the 2000s APM tools continued to be acquired by larger vendors. Then over the past decade, […]
IoT Security: 42 Top Internet of Things Security Solutions
July 16, 2019 by Hayden James, in Blog LinuxAfter researching IoT security. I’ve decided to maintain a list of companies which offer IoT (internet of things) security tools and solutions. Feel free to share your solutions, feedback and tips for securing IoT devices. This list will continue to grow in the coming days, week, months and beyond. In the aftermath of the 2016 DDoS […]
Your Web Host Doesn’t Want You To Read This: Benchmark Your VPS
June 17, 2019 by Hayden James, in Blog LinuxJune 17th 2019: Added instructions for network speed test using speedtest-cli script. Oct 31st 2017: Also see this list of command line scripts. Nov 2nd 2016: Included quick dd commands to check cached vs uncached disk read performance. This article will highlight using the ‘dd’ Unix command for a quick benchmark of your Linux server or VPS. […]
Nginx tuning tips: TLS/SSL HTTPS – Improved TTFB/latency
June 14, 2019 by Hayden James, in Blog LinuxSince 30th June 2018, the PCI Security Standards Council requires that support for SSL 3.0 and TLS 1.0 be disabled. TLS 1.1 or higher must be used and TLS 1.2 is strongly recommended. In addition, as of July 2018, Google Chrome began to mark ‘HTTP’ web sites as “not secure”. Over the past few years, the […]