Articles about centos | UserComp.com

Running IPv6 DNS Server Inside CentOS Docker Container

This article explains how to run an IPv6 DNS server inside a CentOS Docker container. Follow these steps to set up a DNS server that resolves IPv6 requests within the container.

Prevent Change File Owner/Group on CentOS using FileZilla FTP Upload Server

This article provides a solution to prevent file ownership changes when uploading files to a CentOS server using FileZilla FTP upload server. It explains the issue and offers a fix.

Safely Upgrade OpenSSH on Remote Linux PCs (CentOS 6.7)?

Learn how to safely upgrade OpenSSH on remote CentOS 6.7 Linux PCs. This guide provides a script to filter temporary SSH access and avoid service interruptions.

Checking URL Requests Still Processed in Apache CentOS: A Tech Support Guide

Running Apache requests on CentOS can take a long time, sometimes up to 100 seconds. However, this doesn't necessarily mean there's a problem with the system. In this guide, we'll explore how to check if URL requests are still being processed in Apache CentOS and provide tips for troubleshooting common issues. Read more for helpful advice from our tech support team.

Can't Browse Internet on CentOS 9 Guest OS in VMware Workstation 16 Player: Troubleshooting Guide

Having trouble browsing the internet on your CentOS 9 guest operating system in VMware Workstation 16 Player? This guide will walk you through the steps to identify and resolve common issues preventing internet connectivity.

How to Fix OpenSSL Version Mismatch when Compiling OpenSSH-9.9p2 on CentOS 6.2

Learn how to resolve the OpenSSL version mismatch issue when compiling OpenSSH-9.9p2 on CentOS 6.2. Follow this step-by-step guide for a successful compilation.

GPG Check Failed While Installing Panopta Agent on CentOS 9

This article provides a solution for a GPG check failure while installing the Panopta Agent on CentOS 9.

CentOS 7 Stuck on Clone Syscall with Docker Container (Ubuntu 24)

This article explores the behavior of a CentOS 7 Docker container running Ubuntu 24 that gets stuck on the Clone syscall. We'll use strace to investigate the cause.

ProFTPD Fails to Start PID File Error on Manual Installation on CentOS 7

This article provides a solution for the ProFTPD Fails to Start PID File error encountered during manual installation on CentOS 7.

Failed to Use Haproxy with Ubuntu or CentOS for Python App: IP Connect API Solution

This article discusses a common issue when trying to use Haproxy with Ubuntu or CentOS for a Python app that requires an IP connect API. The article provides a solution to the problem by explaining how to set up the API on xyz.app.com.

How to Make a Root User Appear on the GUI Login Page in CentOS 8

Learn how to make a root user appear on the GUI login page in CentOS 8. This quick guide covers the necessary steps to update your system configuration and ensure secure access.

How to Make a Root User Appear on the GUI Login Page in CentOS 8

Learn how to make a root user appear on the GUI login page in CentOS 8. This guide includes step-by-step instructions and is SEO optimized.

Running Ubuntu 20.04 within a Non-Privileged Docker Container on CentOS 7

Learn how to run Ubuntu 20.04 within a non-privileged Docker container on a CentOS 7 host machine. This tech support article provides a step-by-step guide to help you set up and access your Ubuntu container securely.

CentOS 7 VPS: Docker Containers with Dnsmasq Not Accessible Outside via ZeroTier

This article discusses a common issue with CentOS 7 VPS running multiple Docker containers exposed to 127.0.0.1 and accessed via ZeroTier. The Dnsmasq container is not reachable from outside connections. This article provides a suggested solution to the problem.

Slurm Service Status: Failure on CentOS Cluster - Reinstallation Troubleshooting

After reinstalling Slurm resource management on a CentOS cluster, the Slurm daemon (slurmd) service is failing to start. This article provides a short overview of the issue and suggests further steps for troubleshooting and resolution.

CentOS Cluster: Master Node Not Recognizing Nodes - SLURM 18.08.8

This article addresses the issue of a CentOS cluster master node not recognizing nodes when using SLURM 18.08.8. It provides potential solutions and recommendations for running batch commands and programs.

Installing Guest Additions on CentOS 9 Stream in VirtualBox

Learn how to install Guest Additions on CentOS 9 Stream in Oracle VirtualBox.

CSF Blocks FTP Downloads from Remote Servers in AlmaLinux 9/CentOS 7 Migration

Experiencing issues with FTP downloads from remote servers during AlmaLinux 9 or CentOS 7 migration? Learn how the Config Server Firewall (CSF) may be causing the problem and how to resolve it. This SEO-optimized article provides a solution for tech support professionals and enthusiasts encountering this issue.

DNFRepo List Returns Different Responses: CentOS 9 Stream and Zotac

Experiencing issues with DNF repo list while managing Ansible playbooks for CentOS 9 Stream and Zotac machines. Unable to find popular packages on Zotac.

How to Route LAN Users on CentOS 7 to Use IPPBX through eth1

In this tech support article, we will guide you on how to route LAN users with an IP address range of 10.70.100.0/24 to use the IPPBX through eth1 on CentOS 7. Follow the step-by-step instructions to configure your network settings and enable seamless communication.

Creating a Dockerfile with Sudo Visudo and CentOS 7 Base Image: A Tech Support Guide

In this tech support guide, we'll walk through the process of creating a Dockerfile using the CentOS 7 base image, and editing the etc/sudoers file to append NOPASSWD privileges for new user groups. This can be a useful technique when setting up development or production environments in Docker.

Fix Docker Install CentOS 7.4 Version Info Failed Error

Having trouble installing Docker on CentOS 7.4? This article will guide you through fixing the version info failed error during installation using yum. Learn the steps to successfully install Docker on CentOS 7.4.

Can't Reach Another Computer via OpenVPN on CentOS (Azure IP: 10.5.0.4, OpenVPN IP: 10.6.0.4)

Having issues reaching another computer via OpenVPN on your CentOS machine with Azure IP 10.5.0.4 and OpenVPN private address 10.6.0.4? This article provides a possible solution for connecting your networks. Read more to learn how to troubleshoot.

Cannot Reach Another Computer Via OpenVPN on CentOS: Azure IP Addresses

This article explains how to resolve the issue of not being able to reach another computer via OpenVPN on a CentOS machine with Azure IP addresses for both the CentOS and OpenVPN machines.

AlmaLinux 9.4 Multi-NIC Routing Issue with 'use()' function including redhat CentOS

Users of AlmaLinux 9.4 are encountering issues with multi-NIC routing when implementing the 'use()' function, which is also present in CentOS. This article aims to provide a solution for this problem.

Optimizing Proxmox VM Allocation on HP ProLiant DL380 G10 for Small Business (CentOS ERP and Windows Server)

Learn how to optimally allocate resources for two VMs (CentOS ERP and Windows Server) on an HP ProLiant DL380 G10 with Proxmox, ensuring efficient performance for your small business.

CentOS Linux End of Life: CentOS Project Announces Shift to CentOS Stream

The CentOS Project announced in December 2020 that they would discontinue CentOS Linux and shift their focus to CentOS Stream. CentOS Linux 8 reached its end of life on December 31, 2021. Read more to learn about the changes and what it means for CentOS users.

Maintaining CentOS 7 Past EOL: Using Vault Repos for Yum Config, Troubleshooting OpenSSL and OpenJDK Package Installations

Learn how to maintain a CentOS 7 hosted service past its End of Life (EOL) by using Vault repositories to update your system configuration. This guide covers troubleshooting OpenSSL and OpenJDK package installations.

VirtualBox/Vagrant: CentOS7 Guest Cannot Mount Shared Folders on Unexpected Host Reboot (Windows11)

This article explains how to resolve an issue with CentOS7 guest virtual machines on Windows11 hosts, where shared folders cannot be mounted after an unexpected host reboot using VirtualBox and Vagrant.

Resolving Kernel Panic During New NVMe SSD Installation on CentOS 7

This article provides a solution for resolving a Kernel Panic issue during the installation of a new NVMe SSD on a CentOS 7 (7.6.1810) system.

Abaqus CAE Fails to Launch via RDP/VNC on CentOS

Users report that Abaqus CAE fails to launch when accessing a CentOS system remotely via RDP or VNC. The software loads without issues when logged in physically. This article provides suggested solutions to resolve the issue.

Setting up Multiple Netcat Connections in Old CentOS Offline LAN

Learn how to set up multiple Netcat connections in an old version of CentOS offline LAN network. Follow this step-by-step guide to configure hosts like nc <ip1> 5555.

Resolving Password Prompting Issues with LFTP Connections on CentOS 7 for SSH Key Authentication

This article provides instructions on how to resolve password prompting issues when using LFTP for SSH-key authenticated connections on CentOS 7.

Troubleshooting High Avg CPU Load Issue on CentOS VM Running MongoDB

Learn how to diagnose and resolve a high average CPU load issue on a CentOS VM hosting a MongoDB instance, ensuring optimal performance.

Error Installing MongoDB on CentOS: libc.so.6 (GLIBC_2.34) Required

This article discusses an error encountered during the installation of MongoDB on CentOS, which requires the libc.so.6 (GLIBC_2.34) library.

GRUB-boot ISOLINVR2 logical volume: Duel limitation in CentOS 7

This article explains how to boot from an ISOLINVR2 logical volume in CentOS 7 using GRUB, despite duel limitation infrastructure. It covers the necessary steps to clone the ISO file using tools like gparted or Clonezilla, and the configuration of GRUB.

CentOS Stream: Unmounting Issue After Adding New Disk Drive

Users encountering issues unmounting a newly attached disk drive in CentOS Stream. Learn how to resolve this problem and retain data from the previous directory.

Centos 7: Resolving FFmpeg Issues (Version 2.8.15)

Encountered errors while attempting to run FFmpeg on Centos 7 servers? Learn how to resolve FFmpeg version 2.8.15 issues with this comprehensive troubleshooting guide.

Reducing Size of /dev/centos/root in XFS Filesystem

This article explains how to reduce the size of the /dev/centos/root volume in an XFS filesystem on CentOS. Although XFS filesystem itself cannot be directly reduced, the volume group and logical volumes can be adjusted to achieve the desired result.

CentOS Stream 9: Frequent 'Nameserver Not Known' Issue

A CentOS Stream 9 server, directly connected to a router, is functioning well except for the frequent occurrence of the 'Nameserver Not Known' error. In this article, we discuss possible solutions to resolve the issue.

CentOS Linux 7: Thunar Blocks File Transfers Via SFTP on CentOS 7

Learn how to resolve the issue of Thunar blocking file transfers via SFTP on CentOS 7. This article explains the possible causes and provides solutions.

Installing RStudio Server: Failed Docker Container (CentOS 7)

This article guides you through troubleshooting failed RStudio Server installations using Docker on CentOS 7. Follow the instructions to ensure a successful setup.

Samba Shares Fail: Pre-Authentication Failed on Multi-HPC Systems

Experiencing issues with Samba shares failing during file transfers on multiple High Performance Computing (HPC) systems? This article explores possible causes and solutions for the Pre-Authentication Failed error.

CentOS 7: Reinstall GRUB2 on RAID0 Disks for Dedicated Server

This article provides instructions on how to reinstall GRUB2 on CentOS 7 RAID0 disks for a dedicated server that is not responding after a reboot, showing 'No bootable device found'.

Troubleshooting Yum Installation Error: 'Could not retrieve mirrorlist' on CentOS 7

Learn how to troubleshoot and resolve the 'Could not retrieve mirrorlist' error when installing Zabbix agent on CentOS 7 using Yum.

Setting up Two PGbouncer Instances for Database Connection Pooling on CentOS 7.0 with Different Listening Ports

In this tech support article, we will guide you through the process of setting up two PGbouncer instances for database connection pooling on a CentOS 7.0 single VM. Each instance will listen on a different port (6432 and another).

Identifying DDOS Attacked Docker Process on CentOS 7 TellIP Server

Learn how to identify a DDOS attacked Docker process on a CentOS 7 TellIP server. Follow these steps to secure your server and maintain optimal performance.

VirtualBox: Host-Bridged Network Adapter Sometimes Starts, Sometimes Not on CentOS 7 for VM with Multiple Kubernetes Installations

Users attempting to learn Kubernetes with multiple VMs on CentOS 7 encounter issues with the VirtualBox Host-Bridged Network Adapter sometimes starting and sometimes not. This article offers potential solutions.

CentOS Stream 9: WiFi Driver Not Installed - Fix Now

Having trouble with WiFi on CentOS Stream 9? Learn how to install the WiFi driver and get back online. Our step-by-step guide will help you resolve the issue. Don't let connectivity problems slow you down. Read more for more tech support solutions.

Easiest Way to Setup a VPN on CentOS Server for Ubuntu or Windows Clients

Learn how to set up a VPN on a CentOS server and allow Ubuntu or Windows clients to connect. Follow our step-by-step guide for a secure and easy-to-use VPN connection. Improve your online privacy and security today.