Resources, Articles, Tricks, and Solutions in connection to Server Support

How to install and configure DHCP server on Linux ?

This article will guide you on steps to install and configure the #DHCP #server in the Linux system and assign dynamic and fixed #IP addresses to the clients. It takes just a few simple steps to configure the DHCP server in a #Linux machine. Once you have configured it, it will automatically assign the assigning IP addresses and related information to each machine on the network.

The main DHCP #configuration file is /etc/dhcp/dhcpd. conf. The file is used to store the network configuration information required by DHCP #clients.

To enable DHCP or change other TCP/IP settings:

1. Select Start , then select Settings > #Network & Internet.

2. Do one of the following: For a Wi-Fi network, select Wi-Fi > Manage known networks.

3. Under IP assignment, select Edit.

4. Under Edit IP settings, select Automatic (DHCP) or Manual.

5. When you're done, select Save.

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How to Delete a Directory and folder in Linux?

This article will guide you on how to delete a #directory in #Linux using the #rm, rmdir and find commands. It is quite easy to delete a directory in Linux whether it contains files and other #subdirectories, or simply if it is empty. To delete (i.e. remove) a directory and all the sub-directories and files that it contains, navigate to its parent directory, and then use the command rm -r followed by the name of the directory you want to delete (e.g. rm -r directory-name ). The “-rf” flag, along with the “rm” command, removes a directory recursively without prompting the user for confirmation.

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Different Methods to Mount a Drive in Linux ?

This article will guide you on how to use the #mount and #umount command to attach and detach various file systems. You can perform this task on several media options like ISO file, NFS share and USB flash drive. Mounting will not erase everything. The #disk does get modified slightly each time you mount it, though. However, since you have serious directory corruption which cannot be repaired by Disk Utility you need to repair and replace the directory before it can be mounted.

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How to Install sudo on OpenSUSE to execute commands as root ?

This article will guide you on how to use the root user on #OpenSUSE Linux and the sudo command.To use sudo, you need to install and configure sudo on the OpenSUSE #Linux server. The #sudo command allows you to run #programs with the security privileges of another user (by default, as the #superuser). Using the #sudoers file, system administrators can give certain users or groups access to some or all commands without those users having to know the root password.

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Complete Steps to take in order to disable ssh password login on Ubuntu to enhance security

In this article, you will learn how to disable password authentication for SSH including the root user. This will enable the server to only accept key based login and the root user can not login with password.

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Fix Linux Disk space running out error

When iNodes space is exhausted , the server performance will be affected and could be frustrating to fix especially when you are sure that you have not used up all your server resources.

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How to disable weak SSH ciphers in Linux

Is it difficult to disable weak SSH ciphers in your Linux Machine? We will help you.

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Easiest method of restarting Webmin and Virtualmin

This Tutorial will show you the easiest method of restarting a server based on a Webmin and Virtualmin control panel

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Setting up Let's Encrypt SSL for domains hosted on an Apache web server based on CentOS 7

Let's Encrypt has gained popularity because they offer free SSL for millions of websites all over the world. They are a non-profit certificate authority run by Internet Security Research Group (ISRG) that provides X. 509 certificates for Transport Layer Security (TLS) encryption free of charge. The certificate is usually valid for 90 days after which is expires pending when it is renewed.

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Fix unallocated disk space to extend a disk partition in Ubuntu Debian RHEL and CentOS

Allowing your server disk to use all its disk space will help to improve the functionality and performance of your server in general. It is very common for unallocated disk space to be unused by default.

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Installing Netdata and secure using Nginx basic http authentication

Netdata is very essential utility application which provides a real-time monitoring service for Linux systems and applications by displaying interactive charts which can be viewed via a web browser.

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Virtualmin "[ERROR] Failed with error: 100" - How to fix it ?

This article covers methods to resolve Virtualmin "[ERROR] Failed with error: 100".  To fix this issue, run the below commands:

$ chmod 755 /usr/bin/dpkg - should be set by default but who knows (also possible apt-get install --reinstall dpkg)
$ apt-get remove dpkg-dev - might cause issues in some cases
$ apt-get clean
$ apt-get update && apt-get upgrade

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550 SPF check failed email error

This article will guide you on how to fix "550 SPF check failed" email error which occurs due to anti-spam checks at recipient mail server.

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Tips to fix unable to unmount delete VMFS Datastore the resource is in use

This guide will help to fix VMWare error "unable to unmount/delete vmfs datastore: the resource is in use" which occurs when trying to remove an empty VMFS Datastore in VMWare vSphere.

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Vmware operation failed to upload to datastore

This guide will help you to fix errors ecountered while trying to upload or copy files to the VMFS Datastore in VMware vSphere (6.7) using the “Upload Files” button in the vSphere Client interface.

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Solution to error VMWare virtual machine disks consolidation is needed

This article will help you to fix the warning error "VMWare: virtual machine disks consolidation is needed" experienced when trying to delete a snapshot, the snapshot VMDK files or logs have not been deleted correctly.

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VirtualBox installation on CentOS 7

This article will help you to install VirtualBox on Centos. VirtualBox Software helps to create and run virtual machines on a single hardware machine.

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How to enable SSH access on DirectAdmin

This article will help you know the best method to enable ssh access for a user in DirectAdmin control panel and also fix common issues encountered while creating a user to use with SSH.

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How to install and configure Icinga2 on Ubuntu

Icinga 2  helps in the monitoring of core resources on a server thereby serving as a resort of comfort for webmasters and website owners from panic and fear of unnoticed critical service changes within the server environment.

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How to fix OCSP SSL Certificate Stapling error

OCSP SSL Stapling error is usually triggered when accessing a website using https:// SSL protocol.

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How to install Git on Ubuntu 18.04

Different ways to install Git which enables tracking the changes in source code as well as to track changes made in files.

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How to fix 550 5.7.1 authentication required Email client error

Most Email client users get SMTP error such as "550 5.7.1 authentication required" when there is an issue or errors in the email configuration information.

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How to install and configure Fail2ban on Ubuntu 16.04

Improving Server security by installing Fail2ban on your server to help protect all kinds of services such as sshd, httpd from brute force attacks.

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Rclone installation process

Rclone is an open-source command line tool which helps to sync files to cloud storage which is makes data migration between storage spaces easy.

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How to optimize azure cache for redis

Factors such as memory pressure, high CPU usage, Bandwidth limitations, and Server loads on server side can result in poor performance of Azure Cache for Redis and the Server in general.

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VestaCP Error Lets Encrypt validation status 400 error

VestaCP Let's Encrypt error status 400 occurs when trying to request Let’s Encrypt SSL for domains in a vestaCP control panel.

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How to fix docker Error response from daemon unable to remove volume

Server users experience Docker error such as "error response from daemon: unable to remove volume" when trying to remove the volume of a container in Docker.

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Our DigitalOcean Active Server Support service

We offer Emergency support and Server management services to help your monitor your infrastructure and quickly resolve and issues that could disrupt your services.

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How to fix SMTP status code 431 error

SMTP error 431 results when you have too many recipients while sending an email.

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Sharing data between Docker Container and Host

The complete guide on how to setup Docker volumes  and how  to share data between a Docker container and a host system.

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Installing docker compose on ubuntu 18.04

Missing cUrl and pip packages on Linux Server can trigger Docker Compose installation failures. This guide will show you how to install docker-compose on Ubuntu without any installation issues.

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How to modify Redis configuration on Ubuntu

By means of Redis command line, changes in Redis Server configuration can be easily implemented. In summary Redis is an in-Memory data store capable of storing data.

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