Category Archives: Linux (Ubuntu)

A haiku about DNS

A haiku about DNS

Here is a haiku (a Japanese poem) about DNS (“domain name system”):

It’s not DNS
There is a no way it’s DNS
It was DNS

Here is a postcard for your sysadmin friend whenever there is a DNS issue:

dns haiku

dns haiku

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How to execute sudo without password?

How to execute sudo without password?

If you are the only sysadmin or developer, you can skip password when you run sudo command. By default, sudo asks for the password. Here is how you can run sudo without having to enter your password.

I’m a new Unix system user. How do I use sudo command without a password on a Linux or Unix-like systems? I log in as tom@my-cloud-server-ip and disabled root login for ssh. After login, I need to run some commands as root user. I am the only sysadmin using my server. How do I run or execute sudo command without a password for a user named Tom under Debian/Ubuntu/CentOS Linux cloud server?

How to run sudo command without a password on a Linux or Unix

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16 Practical Examples of Linux LS command for Beginners

Zabihah Halal Vitamins
16 Practical Examples of Linux LS command for Beginners
Whenever it’s required to take a look at the contents of a directory on the command line in Linux, ls is the command that’s used. It lists the contents sorted in alphabetical order. While that’s the tool’s basic usage, it offers a plethora of features (in the form of command line options) that help you in several circumstances. In this tutorial, we will discuss the usage of some of these command line options through easy to understand examples.

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How to set up MariaDB Master-Slave replication with SSL on Ubuntu Linux

How to set up MariaDB Master-Slave replication with SSL on Ubuntu Linux
How do I setup Master-slave data replication using MariaDB server on Ubuntu Linux 16.04 LTS server? How do I encrypt replication traffic so that the data get encrypted in transit, protecting my data and users from snooping? Master-slave data replication allows you to copy databases to multiple MariaDB servers. This is useful for backup, data […]
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Install and configure a corporate Open Source Booking System on Centos 7

Zabihah Halal Vitamins
Install and configure a corporate Open Source Booking System on Centos 7
In today’s business, it is increasingly necessary to share workspaces, labs, tools, and any other type of resources. Making the most of the available resources has become a competitive advantage for modern businesses. Booked is open source software written in PHP and MySQL that helps organizations and groups efficiently manage, record and track resources of any kind. It allows you to create schedules so users can find schedules available for resource use.

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How to install Percona XtraDB Cluster for MySQL on Debian 8

Zabihah Halal Vitamins
How to install Percona XtraDB Cluster for MySQL on Debian 8
In this article, I will show you how to configure a MySQL database cluster with three nodes in a multi-master replication. Multi-master replication allows writing of records in each node, so if a node will fail, we can work on the other as if nothing happened. This tutorial describes how to install and configure three Percona XtraDB Cluster nodes on Debian 8 servers, we will be using the packages from the Percona repositories.

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