Google Workspace DKIM authentication settings failed.

When generating DKIM in google Google Workspace I got the following error message. This error happens when you have a

Install Jenkins on Ubuntu

Jenkins is an open source automation server. It helps automate the parts of software development related to building, testing, and


Disable MySQL Replication on Slave

To disable MySQL Replication on the Slave server, first, edit MySQL configuration file, usually in /etc/mysql folder, remove entries like

Install Tomcat on CentOS 7

Apache Tomcat is an open source implementation of the Java Servlet and Java Server Pages. To install Apache Tomcat on

grafana dashboard

How to change Node Exporter port

Node Exporter by default use port 9100. You may need to use another port for Node Exporter if port 9100

ack list files

ack show the matched files name only

ack is a command-line utility written in Perl for searching strings inside files. By default when you search, it shows

Install .NET SDK on Ubuntu 20.04

Microsoft .NET SDK and Run time now available for Linux. To install .NET SDK and runtime on Ubuntu 20.04, follow

nextcloud maintenance mode

Enable/Disable Nextcloud Maintenance Mode

Maintenance mode is useful when you are making changes to your nextcloud installation like a software upgrade. To enable maintenance

nextcloud dashboard

Module php-imagick in this instance has no SVG support

On Ubuntu server running Nextcloud, I got the following warning in Nextcloud To fix this warning, install libmagickcore-6.q16-6-extra package with

nextcloud dashboard

NextCloud APCu not available for local cache

When trying to upgrade nextcloud, I get the following error To fix this, you need to install APC cache. For


chattr: Operation not supported while reading flags

When making a file immutable with chattr command, I get the following error The error was due to the file

Checking NVMe Disk

You can use nvme-cli to check your NVMe disks. To install nvme-cli, run On Ubuntu/Debian On RHEL To list of