Add MX Record to Godaddy
This article describes how to add an MX record to Godaddy if the DNS is hosted at Godaddy. Create an A record for “mail”. Point the record to the primary IP where the mail will be hosted. This can be…
Ceph – Zabbix sender issue with v14.2.5
After updating/restarting the manager to v14.2.5 we are no longer able to send data to our zabbix servers. Ceph reports a non-zero exit status from zabbix_sender. Info: ceph mon versions { “ceph version 14.2.6 (ba51347bdbe28c7c0e2e9172fa2983111137bb60) nautilus (stable)”: 3 # cat…
HyperV “GPU RemoteFX 3D Video adapter” gone in Windows 2019 Hyper V
When trying to Enabling Physical GPUs in Hyper-V, the option is not there in the GUI. In Windows 2016 there is an option as in the below screenshot: In Windows Server 2019, here is the screenshot and there is…
How To Install Dig Utility of CentOS
The DIG tool is a part of the BIND Utilities so you need to install them. # yum whatprovides ‘*bin/dig’ To install the BIND Utilities, type the following: # yum install bind-utils
Changing the Windows password during first login
If you get the following error message the first time that you access Windows after installation, then your client has been negotiating with the server for network level authentication. However, network level authentication is executed before a remote desktop session…
Hardening Your WordPress CMS
Here are some great resources for hardening you CMS: WordPress: OWASP WordPress Security Implementation Guide [OWASP] WordPress: Hardening WordPress [Official WordPress Codex] General: How to Secure your CMS [MalwareBytes] General: A Security Overview of Content Management Systems [Detectify]
Resize EBS volume without rebooting in AWS
So you need to resize an 8GB boot Disk in AWS after the EC2 is created. In this article we resize the EBS volume without rebooting.
Plesk Roundcube sending error – SMTP Error (535): Authentication failed
When sending from Roundcube on an Ubuntu server with plesk, we get the following error: SMTP Error (535): Authentication failed
How to change Postfix hostname and SMTP banner on Plesk server
Connect to a Plesk server via SSH. Create a copy “postfix” configuration file: # cp -a /etc/postfix/main.cf /root/backup_main.cf Open “postfix” configuration file in a text editor, for example, “vi” editor: # vi /etc/postfix/main.cf Add the lines specified below to the…
Freeing disk space on your Linux server
To find out where disk space is being used: Get to the root of your machine by running # cd / Run # sudo du -h –max-depth=1 Note which directories are using a lot of disk space. cd into one…