Linux Cockpit is a web-based graphical interface designed for managing Linux servers. It simplifies system administration tasks by providing an easy-to-use dashboard, making it accessible to both experienced administrators and beginners. With Linux Cockpit, you can perform various tasks directly The post An introduction to Cockpit appeared first on Tales from the Datacenter v2.0. An introduction to Cockpit was first posted on September 21, 2024 at 11:52 pm. ©2018 "Tales from the Datacenter". Use of this feed is for personal non-commercial use only. If you are not reading this article in your f ..read more

I started some home lab cleanup this long weekend, and one of the first steps was to set up a separate DNS server for the lab. This is really just to make it easier for me to try some automation tricks without risking breaking the home DNS. This new DNS system will forward requests to my main DNS server and also host DNS for lab.m57.local.  For the first step, lets get the lab it’s own DNS server. For that system, I built a new VM with 4 vCPUs and 8GB of RAM. It’s a little much for a DNS server, but I wanted the system to have plenty of free resources for later. The disk layout is as f ..read more

While working on a Gluster project, I ran into an issue  adding in a third node to an existing cluster running on Oracle Linux 8. This was very frustrating, as the cluster was working fine. I went ahead and built a new cluster in my home lab, to see if I could replicate the issue. Even in the homelab, I was unable to add nodes to the cluster! The gluster peer probe failed! [root@gluster1 ~]# gluster peer probe gluster3peer probe: failed: gluster3 is either already part of another cluster or having volumes configured     After encountering issues adding nodes in two different ..read more

Oracle recently released it’s popular Enterprise Database for the Arm CPU. This is news, as it’s the first new architecture announced by Oracle since they added the Itanium architecture. In fact, this also reverses the current path, where Oracle has been removing CPU architectures from newer versions of the database! Oracle has added support for aarch64, the Arm architecture, in response to customer demand. Arm is an instruction set architecture (ISA) that was originally developed by a British company called Arm Holdings. Today, it’s widely used in a variety of devices, from smartphones and ta ..read more

It’s important to note that Java performance can differ across various versions of the software, influenced by several factors. It’s not uncommon for developers and application owners to be caught off guard, as the latest Java version may not necessarily provide optimal performance. Compiler Enhancements – Whenever a new version of Java is released, it comes with improvements to its Just-In-Time (JIT) compiler. This compiler is responsible for optimizing bytecode during runtime, and the enhancements made to it can lead to better code optimization, improved memory management, and enhanced perf ..read more

I’ve done this several times, and decided it was time to write up how it works. Basically, this blog will show you how to install Oracle Linux using the Oracle public yum server! While this is showing how to install from the internet, you can use the same process to boot from an internal yum server. This is helpful when you can’t do a full PXE install, but still need to use the smaller boot image. First, grab a boot image from https://yum.oracle.com/oracle-linux-isos.html, you will need to download the appropriate “Boot ISO” for your version. As a note, there is the normal RHCK Boot ISO, and t ..read more

I just wrapped up a webinar this week, and it went well. Once of the folks attending  asked about a feature I have beeb really enjoying in 19c. This feature called gradual password rollover allows a database user to have two valid passwords at the same time. Yes, you heard that correctly… TWO DIFFERENT passwords at the same time. This is how you set it up. First, this was a new feature added to 19.12, so if you are on an older version of 19c, you need to patch. Next, lets add a new profile with this feature and a new test user called bubba. Login to the PDB and then add a new profile. The ..read more

I was talking with a friend recently, and he was looking for a quick and easy way to virtualize a small lab system. We discussed a full out hypervisor and management system like Oracle Linux Virtualization Manager (OLVM and Oracle’s oVirt distribution that give you a web interface, clustering and more) , but he really needed something more lite weight and with less overhead. I suggested just use a basic KVM system, and that went down the path of how to use KVM and why I wrote up these steps! Before setting up things, my ARM server ( AMD and Intel follows an identical process!) was installed wi ..read more

I’m a huge fan of VNC. It’s a great way to get X access to a server, without having to install X on your PC. VNC aka Virtual Network Computer, also has an advantage that the X session is running on the target machine, which means if the network drops you don’t loose what you are working on. This is huge for anyone on a questionable network that doesn’t want to loose what they are working on. With later releases of Oracle Linux 8, VNC has changed a bit. It now can run as a service, and also gives you more control over user passwords and what VNC port is assigned to what user. Install is simple ..read more

I have been talking a bit about ARM these days, with many customers looking at ARM on OCI for the application tier. These customers have already learned that ARM is not that different from x86 when running Oracle Linux. The same phyton, same java and even the same php runs on the ARM systems just fine. But that is in Oracle’s cloud. I am also asked, what about on-prem, can I run ARM there? Yes you can, and it is just as easy as running it in the cloud. The biggest difference is the hardware management, ILOM vs ILO vs DRAC etc. Different lights out management software based on the hardware. On ..read more