How Do You Connect over Port 5986 on a Windows Server?

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Problem scenario
Port 5986 is blocked from your Linux server to your Windows server. You have used the nmap command and see that it is filtered. You believe there are no intermediate firewalls or OS firewalls blocking this port. What should you do?

Solution
This assumes you have no firewall blocking port 5986 for incoming connections to the Windows server. nmap will report 5986 is filtered despite there being nothing blocking this port if wsman’s listener has not been properly configured.*

  1. Run this script on the Windows server:

$hostName = $env:COMPUTERNAME
$serverCert = New-SelfSignedCertificate -CertStoreLocation Cert:\LocalMachine\My -DnsName $hostName
Export-Certificate -Cert $serverCert -FilePath c:\vagrant\PsRemoting-Cert1.cer
Get-ChildItem c:\vagrant\PsRemoting-Cert1.cer
Enable-PSRemoting -Force
New-Item -Path WSMan:\localhost\Listener\ -Transport HTTPS -Address * -CertificateThumbPrint $serverCert.Thumbprint -Force

  1. That is it.

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How Do You Install Incubed (in3) for Bash?

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Problem scenario
You want to do Blockchain development with Ethereum using Bash. How do you install Incubed (in3) for Bash on a Debian distribution of Linux (such as Ubuntu or Linux Mint)?

Solution
Run these commands:

sudo apt -y update
sudo apt-get -y install software-properties-common
sudo add-apt-repository ppa:devops-slock-it/in3
sudo apt -y install jq in3 in3-dev

If you want to receive free cryptocurrency by just learning more,

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How Do You Troubleshoot the AWS Error “Subnets specified must be in at least two different AZs”?

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Problem scenario
You run an AWS CLI command, but you get this error message:
“An error occurred (InvalidParameterException) when calling the CreateCluster operation: Subnets specified must be in at least two different AZs”
How do you find subnets in different availability zones?

Solution
Run commands such as these (but replace the “us-west-x” and “us-east-x” with the availability zones that you use):

aws ec2 describe-subnets –query ‘Subnets[?AvailabilityZone==us-west-1a]’
aws ec2 describe-subnets –query ‘Subnets[?AvailabilityZone==us-west-1b]’
aws ec2 describe-subnets –query ‘Subnets[?AvailabilityZone==us-west-1c]’
aws ec2 describe-subnets –query ‘Subnets[?AvailabilityZone==us-east-2a]’
aws ec2 describe-subnets –query ‘Subnets[?AvailabilityZone==us-east-2b]’
aws ec2 describe-subnets –query ‘Subnets[?AvailabilityZone==us-east-2c]’

Now you will see more subnet IDs for your original command.

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How Can a Base Branch Not Be a Master Branch in Git?

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Problem scenario
You have seen the term “base branch” in Git documentation. How can it not be the main branch?

Solution
In the context of a Pull Request, where one branch’s changes will update the same files (if any exist) and any new files will be copied into another branch, the branch receiving the changes and/or files is the base branch. The term “base” is used in GitHub’s GUI and Atlassian BitBucket.

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How Do You Get Your AquaSana Under Sink Water Filter to Not Make Noise?

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Problem scenario
Your AquaSana drinking water filtration system (that does reverse osmosis) is making a loud noise. It makes a moaning or honking sound that is quite loud as the tank fills up. It did not used to do this. What should you do?

Possible solution
You need a new RO flow restrictor. AquaSana can refer to this as item #130 or material #100236736.

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How Do You Repurpose Disk Space from a Windows Install (e.g., /dev/sdbc) to Be Used by Your Linux Server?

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Problem scenario
Your Linux server was installed over an old Windows server. You want to repurpose sections of the hard disk (e.g., sda1 and sda3). Linux has been installed, but some sections of the disk are not usable by Linux. What do you do?

Solution
Warning: This could permanently delete data. If you make a mistake you may need to reformat your Linux server.

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How Do You Troubleshoot the Vagrant Message “/usr/share/rubygems/rubygems/core_ext/kernel_require.rb:83:in `require’: cannot load such file — winrm (LoadError)”?

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Problem scenario
You are running Vagrant, but you get this error: “/usr/share/rubygems/rubygems/core_ext/kernel_require.rb:83:in `require’: cannot load such file — winrm (LoadError)”

You run “gem list” (or “sudo gem list”) and see winrm is installed.

What should you do?

Possible Solution #1 (recommended)

  1. Run this command:

gem list | grep libvirt

2. Verify that libvirt’s version is at least 0.6 or higher.

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How Do You Fix a memcached.so Error when Running PHP Too?

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Problem scenario
You get an error about memcache and you are running PHP. Or you get an error “Unable to load dynamic library “memcached.so”? You run “php –version” and you see an error about memcache or memcached (e.g., a missing memcached.so file). What should you do?

Possible Solution #1
Get a memcached.so file from a working Linux server and place it in the directory that the error message showed in the php –version command.

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Technical Books by Category

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If you resolve to learn more about technologies, you may want to buy technical books.  Here are lists of books on many different I.T. subjects:

Apache Spark
Apache Tomcat
Apache Web Server
AWS
Azure
Bitcoin
Bioinformatics
C#
CFengine
Chef
Docker
E-Discovery
Elastic Stack
Flask
Forensics (Computer Forensics)
Git
Hadoop
Kubernetes
Informatica
Message Queueing Technologies (excluding RabbitMQ)
RabbitMQ
Redis
REST API
Security
Site Reliability Engineering
PowerShell
Puppet
Python
SalesForce
SAP
Squid
SSL and TLS
Terraform
VMware
vSphere
Windows

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Where Can You Find the build_rust.sh Script?

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Problem scenario
You want to use Rust and Incubed (the Blockchains in3 crate). You search for “build_rust.sh”, but you find irrelevant build-rust.sh files. How do you find the one with the underscore (or underbar) and not the hyphen/dash?

Solution
Here is the content:

#!/bin/sh
cd ..
mkdir -p rust/in3-sys/in3-core
mkdir -p rust/in3-sys/in3-core/c
cp -r c/CMakeLists.txt c/macro.cmake c/compiler.cmake c/docs c/src c/include rust/in3-sys/in3-core/c/
cp CMakeLists.txt rust/in3-sys/in3-core/
export UPDATE_IN3_BINDINGS=1
cd rust && …

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