A Technical I.T./DevOps Blog
Problem scenario
You have a Bash script that keeps logging out the user unexpectedly. You have done research and nothing seems to work. Your script does not use the reboot command. Your script does use the exit command.
What do you do to keep the user from logging off while still using this script with the exit command?
Solution
This solution below is for one specific root cause.
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Continue reading “How Do You Keep a User from Logging off Unexpectedly?”
Problem scenario
You want to use a Red Hat Enterprise Linux server to be an FTP server. You have a RHEL instance in AWS. How do you configure this server to serve as an FTP server?
Solution
1. Run this command: sudo yum -y install vsftpd
2. Run the commands below but replace contint with the username of your choice. You will need to respond to a password prompt too.
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Continue reading “How Do You Set up an FTP Server on an RHEL Server Running in AWS?”
Problem scenario
You created an Amazon RDS instance that uses PostgreSQL. How do you connect to it without using the AWS CLI or AWS API from a Windows workstation?
Solution
Prerequisites
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Continue reading “How Do You Connect to an Amazon RDS Instance?”
Question
What ratings do U.S. based cryptocurrency exchange companies have with the Better Business Bureau?
Answer
Updated on 3/6/24.
Updated on 12/4/20.
Some bitcoin and altcoin enthusiasts are not interested in purchasing cryptocurrencies from non-American companies. Some people argue that the Better Business Bureau is run by the businesses themselves, and thus protector of businesses.
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Continue reading “Reputations of Cryptocurrency Exchange Companies in the U.S.”
Problem scenario
You want to test out an Amazon RDS database instance. (You want to use a database PaaS offering and VPC as opposed to EC-2.) What do you do?
Solution
1. Log into the AWS console.
2. Click “Launch a DB instance”
3. Choose the database engine you want (e.g., PostgreSQL). Click “Next”.
4. Click the option for “Dev/Test” and click “Next”.
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Continue reading “How Do You Create an Amazon RDS Database Instance?”
Question
What is Amazon VPC?
Answer
VPC stands for Virtual Private Cloud. For a typical VM in AWS, there are restrictions on IP address assignments. VPC allows you to configure servers and network access points without restrictions. It allows you to leverage AWS with your own network in a separate data center. It is ideal for hybrid clouds or situations where you need full control of networking without the constraints of typical AWS deployments.
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If you want to receive free cryptocurrency by just learning more,
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Continue reading “Interested in Buying Cryptocurrency besides Bitcoin (aka Altcoins)?”
The perceived usefulness of application servers seems unquestioned in many corners of the I.T. world. The conditions that facilitate the deployment of application servers in architectural planning persist. However some people think that code can be written to function on a server that interacts with a web and/or database server without a typical application server being deployed in the middle of the customized code and the OS itself. Some professionals do not think that application servers are necessary.
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Continue reading “Will the Market for Application Servers Grow?”
Problem scenario
You are trying to create a virtual router in OpenShift. When you run the command “oc adm router goodname” you get this error:
“error: router could not be created; could not retrieve list of security constraints to verify service account “router”: securitycontextconstraints.security.openshift.io is forbidden: User “jdoe” cannot list securitycontextconstraints.security.openshift.io at the cluster scope: User “jdoe” cannot list all securitycontextconstraints.security.openshift.io in the cluster”
What should you do?
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Question
What are the differences between Kubernetes and OpenShift?
Answer
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Continue reading “What Are the Differences between Kubernetes and OpenShift?”