Category: Linux

Proxmox Backup Server (PBS) with NFS [Resolved]

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 »

Proxmox Backup Server (PBS) with iSCSI [Resolved]

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...Read More »

How to install php-mcrypt module on CentOS 8 with PHP 7.4

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...Read More »

AWX Server Error Has Occurred

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...Read More »

SSH and FIPS Mode Enabled

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 »

CMMC FIPS Mode Enabled

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...Read More »

How to adapt the scap-security-guide for DISA CIS for CentOS8 Linux

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...Read More »

ceph: Prepare the environment

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 »

How to install ceph nautilus with ceph-ansible

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...Read More »

CentOS 8 (EOL 2021) Migration to CentOS 8 Stream

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...Read More »

CentOS 6 End Of Life Repositories

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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