Linux server security is of critical importance to sysadmins. One central part of keeping Linux servers secure is by installing security updates promptly. Too often, there are compromised servers on the internet due…
What do you do when you question whether your internet connection is working, or not? I built Pinging.net to be a fast and convenient way to monitor your internet connection. How does pinging.net work?…
MongoDB is an open-source NoSQL database management system that stores data in JSON-like documents. It’s designed to handle large volumes of data with a document-oriented architecture and can operate without a predefined schema,…
Some time ago, I received an email from a client experiencing slow performance issues with a LEMP (Linux, Nginx, MySQL, and PHP web server). During a full audit, I found that the server’s…
Upgrading from CentOS 7 to AlmaLinux 8 is a significant step towards ensuring that your systems remain secure, supported, and up-to-date with the latest features and security patches. AlmaLinux 8, as a community-driven…
Database monitoring is indispensable for maintaining the health, performance, and reliability of your database system. It provides administrators and IT teams with real-time insights into the system’s operations, enabling them to proactively identify…
Table of Contents Alice and Bob Imagine there’s a city in a valley. On either side of the valley, there’s an army commanded by a general. On the left hill stands General Alice…
To build experience with Linux commands, there are a few things you can do. First, try to use the command line interface as much as possible. This will give you practice with the…
You may have been following my Linux home lab build. One of the most important decisions when building your home lab is selecting the proper router/firewall for your network. After many hours of…
The official alternative to CentOS 8 is CentOS Stream. Read: Converting from CentOS Linux to CentOS Stream. According to Chris Wright, Red Hat’s CTO, the CentOS Stream project provides “a rolling preview of…
<?php var_dump(realpath_cache_size()); ?> Enjoy! realpath_cache_size = 4M realpath_cache_ttl = 120 Note that if your using Apache Prefork-mpm mod_php to run PHP (the fastest when loading only PHP and not with static content) then…
atop -m Additional examples of using the ‘atop’ command for Linux server performance analysis: atop -c atop is an ASCII full-screen performance monitor that can log and report the activity of all server…
OPcache is a PHP extension that improves PHP performance by storing precompiled script bytecode in shared memory, thereby removing the need for PHP to load and parse scripts on each request. The extension…
htop uses a cursor-controlled interface for sending signals to processes. One example where this is helpful is: you don’t have to type in PIDs; select one or more processes using your mouse cursor…
These are not mind-blowing results. However, depending on your current throughput of PHP requests, you may be happy to take whatever improvements you can find. Also, this test was with WordPress only; with…
For added security, you can also use additional tools or services, such as ModSecurity and Sucuri. Or, instead of CSF + LFD, you can use APF + BFD. There’s also bitninja.io, Imunify360 and others….
MySQLTuner supports Galera Cluster, TokuDB, Performance schema, Linux OS metrics, InnoDB, MyISAM, Aria, etc. – MySQLTuner on Github. You cannot replace Professional MySQL tuning with scripts. Scripts serve as essential guides, sometimes spot-on,…
-y, –sysenable system stats (interrupts, context switches)–snmp-cpu–floatforce float values on-screen (mutual exclusive with –integer)–top-io-advshow most expensive I/O process (incl. pid and other stats)–qmailshow qmail queue sizes (needs qmail)–top-bioshow most expensive block I/O process…
sudo iftop -F 192.168.1.0/24 pacman -S iftop iftop command examples iftop is a terminal program that shows network activity and details in text form. It’s suitable for users who want to monitor network…
My Home lab – a work in progress (everything pictured is listed below) As of today, I’ve almost completed the setup of my new Home lab, and it’s now fully functional. I’m pleased…
Authentication keys for SSH, biometric authentication, and single sign-on (SSO) are exemplary alternatives that bolster security and enhance user convenience. Update: March 4th 2024: While the guidance below – originally provided in 2013 –…
There are two main reasons to avoid the use of .htaccess files. This search turned out to be unexpectedly time-consuming, but it eventually led me to this article. In the comments section, Martin from Foliovision…
Related reading: Above: Cool Retro Term. The terminal emulator stands as an unsung hero, bridging the gap between user and machine with a blend of simplicity and power. As we delve into the…
