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Active-Active vs Active-Passive High Availability Cluster

Overview The two most commonly used high availability (HA) cluster configurations are active-active and active-passive. What’s the difference between...

Disable MySQL Strict Mode

This is enabled by default, but you can disable it in one of a couple ways.

Set-Up Master-Slave Replication for PostgreSQL 9.6 on Ubuntu 16.04

What we will do: Install PostgreSQL 9.6.Configure MASTER Server.Configure SLAVE Server.Copy PostgreSQL Data from MASTER to SLAVE.Testing.

Zimbra XXE / SSRF Vulnerability Disclosure

At March 18, 2019 , Rene Ottom, Vice President Product eMail and Collaboration announced that The Zimbra Security team has been...

How To Install Elasticsearch, Logstash, and Kibana (Elastic Stack) on Ubuntu 16.04

Introduction The Elastic Stack — formerly known as the ELK Stack — is a collection...

March 13, 2019: End-of-Life for All TLS-SNI-01 Validation Support

Let’s Encrypt allows subscribers to validate domain control using any one of a few different validation methods....

Netstat Cheatsheet

To view the total number of connections to a port, run the following command in ssh netstat -tuna |...

Hypervisor KVM

Have you ever wondered how a cloud works? It is the most fast-growing IT-trend which attracts billions...

How To Make Changes In resolv.conf Permanent in Ubuntu

When you change the DNS configuration using /etc/resolv.conf file, you must have noticed that the changes are not permanent. A reboot and...

Enable Nginx Status Page

Nginx status page can give realtime data about Nginx’s health. It can help you tweak few Nginx config. Status data can be...
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How to run a manual backup on cPanel

You can use the /usr/local/cpanel/scripts/pkgacct script to create a cpmove archive for an account. After you create the archive, you can then restore the account on any cPanel...

Remove AWS Cloudinit

When we copy all data from AWS instance without excluding the cloud-init you will see errors as follows but it will continue...

Dell EMC PowerEdge RAID Controller CLI Reference Guide

Drive show commands The PERC Command Line Tool supports the following drive show commands: perccli /cx[/ex]/sx...

MySQL – Restore a Single Table from a FULL mysqldump file

Use the sed command on your bash shell to separate the data of the table that you want to restore. For example, if we want...