Technology

OpenSSL Initial Setup 1. Create a folder structure mkdir -p certs/{ca,mid-ca,server}/{private,certs,newcerts,crl,csr} 2. Change the permissions chmod -v 700 certs/{ca,mid-ca,server}/private 3. Create index files touch certs/{ca,mid-ca}/index 4. Set a serial number openssl rand -hex 16 > certs/ca/serial openssl rand -hex 16 > certs/mid-ca/serial 5. Copy and place the configuration files ca.conf - mid-ca.conf See also: OpenSSL - Initial Setup OpenSSL (1) - Root CA OpenSSL (2) - Intermediate CA OpenSSL (3) - Server Certificate ...

Register AWS Accounts to the Terminal Set AWS Credential The command to check the Current AWS Credentials aws sts get-caller-identity The command to clear the AWS Account from the terminal unset AWS_ACCESS_KEY_ID unset AWS_SECRET_ACCESS_KEY unset AWS_SESSION_TOKEN

Deploy a Linux machine Update OS sudo yum update -y Update Hostname and check it sudo hostnamectl set-hostname DEV-VAR-OIDC2.apj.cloud hostnamectl Update TimeZone and check it sudo timedatectl set-timezone Australia/Sydney timedatectl DNS Settings - Make sure all the DNS servers are registered sudo vi /etc/resolv.conf Install some components for any Linux OS sudo yum install sssd-ad sssd-tools realmd adcli Install some components for Amazon Linux 2023. sudo yum install oddjob oddjob-mkhomedir Check the status of Active Directory realm discover apj.cloud ...

How to Ignore Uploading Folders and Files to GitHub For example .venv folder Open your project folder in VS Code. Open .gitignore file in the root of the project Add the following line to .gitignore: .venv/ Save the file. then Git will ignore the .venv folder, and it won’t be tracked in your repository. If .venv was already committed before, you’ll need to remove it from Git history using: git rm -r --cached .venv git commit -m "Removed .venv from repository" git push origin main # or your current branch You can check if .venv is ignored by Git using the following command ...

Create a new blog post in HUGO Create a new file hugo new posts/create-a-new-blog-post.md Add Tag and Category to the header --- date: '2025-02-25T22:21:46+11:00' draft: false title: 'Create a New Blog Post' tags: ["Hugo", "Blog","Homepage"] categories: ["Technology"] --- Edit the blog page Check the page in debugging mode hugo server hugo serve Open the page from the browser http://localhost:1313/

Terraform tfvars file When a tfvars file is in a different location, you must specify it using the “-var-file” option. However, creating a symbolic link can simplify the command operation. Create a symbolic link ln -s ../common.tfvars terraform.tfvars Run a simple terraform command without option terraform plan Screenshot of the process

How to disable sounds in VS Code. Open the Command Palette (Ctrl + Shift + P). Search for “Preferences: Open Settings (JSON)” and select it. Add the following line inside the JSON file: "editor.accessibilitySupport": "off",

Using GIMP Open your SVG file in “GIMP” Resize to “256x256” pixels Click “File” → “Export As”, choose “.ico” format Save the file

How to Enable GUI Access via Fleet Manager Ensure SSM Agent is Installed and Running Windows EC2 instances must have the “SSM Agent” installed and running. Check the status by the powershell command Get-Service AmazonSSMAgent Attach a Role with the following policies AmazonSSMManagedInstanceCore AmazonSSMFullAccess (This is required for GUI access via Fleet Manager) How to access to EC2 via Fleet Manager Go to “Systems Manager” → “Fleet Manager” ...

Copy certificate CloudShell Copy directory cp -r wildcard-v6 wildcard-v7 ZIP the directory zip -r wildcard-v7.zip wildcard-v7 Download from CloudShell See also: OpenSSL (3) - Server Certificate OpenSSL (4) - Client Certificate