Intro

Scripts, CLI automation, and custom tools for Linux, WSL2, and other environments

Prepare environment

Create Scripts Directory

• Create ~/bin directory for user-specific scripts ¹ and cd into it

mkdir -p ~/bin && cd ~/bin

• Add ~/bin to PATH (so scripts can be run from anywhere)

echo 'export PATH="$HOME/bin:$PATH"' >> ~/.bashrc

• Reload shell

source ~/.bashrc

Making Scripts Executable

• Make the script executable

chmod +x example_script.sh

• Run the script

example_script.sh

Bash Scripts

Git, GitHub, and SSH Configuration

setup-git-ssh.sh

#!/usr/bin/env bash
set -euo pipefail
 
# ============================
# Git + GitHub SSH Setup Script
# ============================
 
SSH_KEY="$HOME/.ssh/id_ed25519"
REPO_URL="https://github.com/settings/ssh/new"
 
echo "Git configuration"
echo "-----------------"
 
# Check existing Git credentials
EXISTING_NAME=$(git config --global user.name || true)
EXISTING_EMAIL=$(git config --global user.email || true)
 
if [[ -n "$EXISTING_NAME" ]]; then
    echo "Git user.name already set: $EXISTING_NAME"
else
    read -rp "Enter your Git user name: " GIT_NAME
    git config --global user.name "$GIT_NAME"
fi
 
if [[ -n "$EXISTING_EMAIL" ]]; then
    echo "Git user.email already set: $EXISTING_EMAIL"
else
    read -rp "Enter your Git email address: " GIT_EMAIL
    git config --global user.email "$GIT_EMAIL"
fi
 
echo ""
echo "Verifying Git configuration..."
echo "Name : $(git config --get user.name)"
echo "Email: $(git config --get user.email)"
 
echo ""
echo "Setting up SSH key for GitHub..."
 
# Ensure ~/.ssh exists
mkdir -p "$HOME/.ssh"
chmod 700 "$HOME/.ssh"
 
if [[ -f "$SSH_KEY" ]]; then
    echo "Existing SSH key found at $SSH_KEY. Using this key."
else
    read -rp "No SSH key found. Press ENTER to generate a new SSH key..."
    ssh-keygen -t ed25519 -C "$(git config --get user.email)" -f "$SSH_KEY" -N ""
fi
 
# Start ssh-agent and add key if not already loaded
eval "$(ssh-agent -s)" >/dev/null
ssh-add -l >/dev/null 2>&1 || ssh-add "$SSH_KEY"
 
echo ""
echo "Your public SSH key:"
echo "-------------------------------------------"
cat "${SSH_KEY}.pub"
echo "-------------------------------------------"
 
# --- Check if key is already on GitHub ---
echo "Checking if SSH key is already registered with GitHub..."
SSH_TEST=$(ssh -o BatchMode=yes -T git@github.com 2>&1 || true)
 
if [[ "$SSH_TEST" == *"successfully authenticated"* ]]; then
    echo "SSH key is already registered with GitHub. No need to add it."
else
    echo "SSH key not yet added to GitHub."
 
    # --- Auto-open in browser ---
    echo "Opening GitHub 'New SSH Key' page in your browser..."
    if grep -qEi "(Microsoft|WSL)" /proc/version &> /dev/null; then
        # WSL → open in Windows browser
        explorer.exe "$REPO_URL"
    elif command -v xdg-open &> /dev/null; then
        # Linux GUI
        xdg-open "$REPO_URL"
    elif command -v open &> /dev/null; then
        # macOS
        open "$REPO_URL"
    else
        echo "Please manually open: $REPO_URL"
    fi
 
    read -rp "Press ENTER once you've added the key to GitHub..."
fi
 
echo ""
echo "Testing SSH connection to GitHub..."
ssh -T git@github.com || true
 
echo ""
echo "Setup complete!"

Auto-repo creation

• Install GitHub CLI

sudo apt install gh
gh --version

• Authenticate

gh auth login

• Create init-repo.sh script in ~/bin

init-repo.sh

#!/usr/bin/env bash
# usage: ./init-repo.sh <repo-name> [private]
 
REPO_NAME="$1"
VISIBILITY="$2" # optional: private or public (default public)
 
if [ -d ".git" ]; then
  echo "⚠️  This folder is already a Git repository"
  echo "Please run this script in an empty folder or a new folder."
  exit 1
fi
 
if [ -z "$REPO_NAME" ]; then
  echo "Usage: ./init-repo.sh <repo-name> [private]"
  exit 1
fi
 
# Determine visibility flag
if [ "$VISIBILITY" = "private" ]; then
  VIS_FLAG="--private"
else
  VIS_FLAG="--public"
fi
 
# Only create README if it doesn't exist
[ -f README.md ] || echo "# $REPO_NAME" > README.md
 
# Initialize git
git init
git add README.md
git commit -m "Initial commit"
 
# Create GitHub repo and push
gh repo create "$REPO_NAME" $VIS_FLAG --source=. --remote=origin --push
 
# Get new repo URL
REPO_URL=$(gh repo view "$REPO_NAME" --json url --jq .url)
echo "Opening repo URL in browser: $REPO_URL"
 
# --- Auto-open in browser ---
if grep -qEi "(Microsoft|WSL)" /proc/version &> /dev/null; then
    # WSL
    explorer.exe "$REPO_URL"
elif command -v xdg-open &> /dev/null; then
    # Linux GUI
    xdg-open "$REPO_URL"
elif command -v open &> /dev/null; then
    # macOS
    open "$REPO_URL"
fi

• Usage: Create a public repo

./init-repo.sh my-project

• Create a private repo

./init-repo.sh my-project private