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Linux Cluster Blog is a collection of how-to and tutorials for Linux Cluster and Enterprise Linux

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db5 error(11) from dbenv->open: Resource temporarily unavailable when doing dnf install

If you are having an issue similar to this message The issue is likely due to a locked or corrupted database caused by an interrupted dnf process Step 1: Remove RPM Database Locks: Step 2: Rebuild the Database Step 3: Clear all cache data to remove inconsistencies References: https://unix.stackexchange.com/questions/634676/criticalyum-main

Ansible – Protecting Sensitive Data

Ansible Automation routinely requires the use of sensitive values. You can use Ansible Vault to provide a way to encrypt and decrypt, and manage sensitive data such as passwords, certificates, keys, and API tokens Encrypt the File Step 1: Create the YAML file named prod.yaml Step 2: After running the command, the terminal will prompt […]

Ansible Execution Strategies

Ansible execution is versatile enough that we can modify how and when tasks are executed. The settings can be made globally or at the play level. The number of parallel threads is determined by fork. The default is 5 Execution Strategies Explanation Example linear This is the default. The task is executed simultaneously against all […]

Ansible-Playbook Commonly Used Optional Arguments

These are commonly used Ansible-Playbook Optional Arguments Flag Description -i, –inventory Specify inventory host path or comma-seperated host list -b, –become Run operations with become (not imply password prompting). Uses existing privilege escalation like sudo, dzdo, runas etc -K –ask-become-pass Ask for the privilege escalation password –become-method <become-method> Privilege escalation…

Running Nvidia Drivers and Toolkit runtime file and encountering ORC metadata for CONFIG_UNWINDER_ORC=y on Rocky Linux 8

After downloading the Nvidia Drivers and Toolkits Make sure you select the corresponding CUDA Toolkit and the CUDA Drivers. The CUDA-Toolkits already have the Drivers as part of the Package When you run the runtime file, you may encounter this error in the logs To resolve the issue, you have to install the following

Installing Nvidia DOCA OFED Documentation from Nvidia for Rocky Linux

Taken from Installing Nvidia DOCA OFED. Do read the documentation for more information. Other relevan documentation will include Quick Reference Installation Profiles DOCA-Host Profile Description doca-ofed Allows you to install the same drivers and tools of MLNX_OFED using the DOCA-Host package, but without other DOCA functionality. doca-network Intended for users who want to use only […]

Checking Assigned Logical Name to Hardware Brand

Method 1: Using Ethernet and lspci Method 2: Using Ishw

Important Repository for Rocky Linux 9

Install dnf-plugins-core Install epel-release Install PowerTools Replace (Now known as Container Runtime Builder CRB) Check for Repositories that are enabled List all the Repositories

Understanding basic nmcli in Rocky Linux 9

In Rocky Linux 9, the nmcli command-line tool (Network Manager Command Line) replaces the traditional ifcfg files that we have been using since Rocky Linux 8. If you can Google “Why nmcli is replacing the ifcfg”, you will find a comprehensive list of key reasons why the transition took place. One thing that I like […]

Installing Freesurfer-8.1.0 on Rocky Linux 8

FreeSurfer-8.1.0 for Rocky Linux 8 requires 2 important dependencies To Install Dependencies, just Once these 2 dependencies are in, you can easily install the freesurfer-Rocky8-8.1.0-1.x86_64.rpm from https://surfer.nmr.mgh.harvard.edu/fswiki/rel7downloads