The Geek Diary

DevOps

ValueError: Masked arrays must be 1-D

by

Scatter plot is a basic plot of dots. You can draw it by calling plt.scatter(x,y). The following example shows a scatter plot of random dots: import numpy as np import matplotlib.pyplot as plt # Set the random seed for NumPy function to keep the results reproducible np.random.seed(42) # Generate a 2 by 100 NumPy Array […]

EFS Mount Issue “Failed to resolve server: Name or service not known”

by

The Problem mount.nfs4: Failed to resolve server fs-d3d54350.efs.us-east-1.amazonaws.com: Name or service not known or: ping: unknown host fs-d3d54350.efs.us-east-1.amazonaws.com The Solution 1. Open the Amazon VPC console. 2. Select the VPC. 3. Review the information in the Description tab. In this example, both settings are enabled. DNS resolution Enabled DNS hostnames Enabled 4. To update these […]

How to Stop and Start Ec2 instance using Jenkins

by

Jenkins is an open-source Continuous Integration tool. However, it’s not limited to Continuous Integration alone. Jenkins is supported by a large number of plugins that enhance its capability. The Jenkins tool is written in Java and so are its plugins. The tool has a minimalistic GUI that can be improved using specific plugins if required. […]

How to Map Static IP to your Domain (with GoDaddy example)

by

To set up a domain name, there are a couple of steps to do. First, you need to purchase a domain name from a domain name registrar. Second, you need to set up DNS records for your domain by using a DNS hosting service. Let’s do this one by one. Prerequisite – A domain name […]