You want to test an applications capabilities on your local network and block all other networks and Internet access while on your Microsoft Windows 10 system. This process was tested using Version 1909 (OS Build 18363.1440). Assume for this experiment that you want to allow any computer or device access to and from this workstation that is found on the…
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By default when installing CentOS 8, the BIOS will be MBR. This can be changed while installing by adding the inst.gpt to the vmlinuz line during the installing process. However, if you forget to do so, it is not too late. For fun, I followed this process that I found online and it worked without damaging the virtual machine. I…
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After months of waiting and after refreshing the twitter feeds, news groups, Reddit, and Rocky Linux homepage, Rocky Linux is now available for download. DistroWatch.com doesn’t even have it listed yet as it is so new. While it is a Release Candidate, it is only hours old at the time of this writing 7:32 AM on May 1, 2021! I…
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Proxmox Backup Server (PBS) is capable of using NFS datastores although the official documentation would prefer the use of local storage. For one reason or another, there was the desire to use a NFS datastore. I tried several different NFS servers, Synology, NetGear, and TrueNAS CORE. The Synology setup was the first of the three I actually got working, mainly…
Read More » The Proxmox Server offers native backup capabilities. It can be slow, but figured out a way to tweak it with PIGZ and that offered great improvements. However, the nightly backups are complete virtual machines. Proxmox Backup Server (“PBS”) can be used to facilitate backups incrementally and offers pruning and so many other backup related features. The setup seems to require…
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A recent migration to a CentOS 8 server from CentOS 6 did not go as smoothly as planned. As well as imagined, everything was upgraded along the way. PHP 5.x to PHP 7.4 for example. One web application had been running smoothly on PHP 5.x for many years. However, after the migration, complained that php-mcrypt needed to be installed. The…
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By default AWX installs the database in the /tmp directory. This can be avoided during install by modifying the inventory file. However, if by chance AWX was installed using the default settings, you will eventually have a corrupt database and a Server Error page will be displayed. If you are fortunate to have a snapshot of a virtual machine or a…
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After an update to a Windows 10 system to the 20H2 build, it was quickly noted that the device manager added virtual ethernet ports to support Hyper-V. A sneaky suspicion that this would break VMware Workstation 15 and it did. A VMware Workstation Solution The first thought, why not try to launch a virtual machine in the existing VMware Workstation…
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Performing a process on more than a couple of dozen macOS (various versions 10.15.x) without issue and then presented with a couple of macOS laptops that would not allow for the deletion of the user. A very ugly error will appear that reads eDSPermissionError which implies that there is a permissions problem. As the root administrator to the laptop, this…
Read More »The Secure Shell, more commonly referred to as ssh, is a cryptographic network protocol for operating network services securely over an unsecured network. Typical applications include remote command-line, login, and remote command execution, but any network service can be secured with SSH. Over the years, a more typical solution is to create a key type of rsa, which is the…
Read More »To gain CMMC compliance, the Red Hat Enterprise Linux 8 operating system or any of it’s variants must enable FIPS mode. FIPS mode can be a difficult hurdle, where it doesn’t have to be. While researching a recent problem that was encountered on a FIPS enabled system, more questions than answered were raised. As you progress through this article, you…
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The scap-security-guide changes in format with each new guide. CentOS 8 is not fully represented within the guide. The XMLs provided differ in context, so the RHEL XML must be used to generate the report but requires a small patch to do so. The CUI Profile The ssg-rhel8-ds-1.2.xml contains the profile cui, while the one for ssg-centos8-ds-1.2.xml does not. [root@admin…
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The goal of this guide is to serve as a precursor to the installation of ceph nautilus on CentOS 7. This process was completed on a virtual environment and has been reproduced several times before this writing. Ceph is an open-source software storage platform that replicates data and makes it fault-tolerant. A good definition and intro to ceph may be…
Read More » There are so many articles on how to install ceph with ceph-ansible. Sadly, as ceph versions change, so does the process for installation. This distinction is rarely made within in the instructions and because of that, the install is doomed to fail and the installer disenfranchised. This article should provide the process needed to install on CentOS 7 ceph nautilus…
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It has been announced that CentOS 8 will be End Of Life in Q4, 2021. It will be phased out in favor of the CentOS 8 Stream, which falls between the Fedora and RHEL distributions. Instead of CentOS builds after RHEL updates, the CentOS 8 will be the development track for RHEL. With that in mind, there is a path…
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CentOS 6 finally came to end of life (“EOL”) as of November 30, 2020. A rude awaking if you haven’t been paying attention and attempt a yum update to be presented with an error message. CentOS does maintain a vault. There is a CentOS-Vault.repo that exists for earlier versions of CentOS 6, but with a few modifications, you can still…
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An instance of CentOS 8 is not running on a Dell or HP Enterprise level server; however, is running on a VMware Workstation on a Windows 10 laptop presents the [Firmware Bug]: the BIOS has corrupted hw-PMU resources (MSR 38d is 3) message. Every article on the internet suggests live with the message it is harmless. While that maybe the…
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