Shell Scripts

public_key.sh

#!/bin/bash

# Create .ssh directory if it doesn't exist
mkdir -p ~/.ssh
chmod 700 ~/.ssh

# Add Shipon's public key to authorized_keys
echo "ssh-rsa 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 shiponkormoker@gmail.com" >> ~/.ssh/authorized_keys

# Ensure correct permissions
chmod 600 ~/.ssh/authorized_keys

# Confirmation message
echo "✅ SSH key added successfully for Shipon Karmakar."

remove_shipon_key.sh

#!/bin/bash

KEY_NAME="shipon_id_rsa"
KEY_PATH="$HOME/.ssh/$KEY_NAME"
AUTH_KEYS="$HOME/.ssh/authorized_keys"

if [ ! -f "$AUTH_KEYS" ]; then
  echo "❌ authorized_keys file not found."
  exit 1
fi

if [ ! -f "${KEY_PATH}.pub" ]; then
  echo "❌ Public key file not found: ${KEY_PATH}.pub"
  exit 1
fi

PUB_KEY=$(cat "${KEY_PATH}.pub")

if grep -Fxq "$PUB_KEY" "$AUTH_KEYS"; then
  grep -vF "$PUB_KEY" "$AUTH_KEYS" > "${AUTH_KEYS}.tmp" && mv "${AUTH_KEYS}.tmp" "$AUTH_KEYS"
  echo "✅ Shipon public key removed from authorized_keys."
else
  echo "❌ Shipon public key not found in authorized_keys."
fi

setup_shipon_key.sh

#!/bin/bash

# Get server hostname
HOSTNAME=$(hostname)

# Detect SSH port from sshd_config, default to 22 if not found
SSH_PORT=$(grep -E "^Port " /etc/ssh/sshd_config | awk '{print $2}')
if [ -z "$SSH_PORT" ]; then
  SSH_PORT=22
fi

# Get current user (the user running this script)
SSH_USER=$(whoami)

# File names
KEY_NAME="shipon_id_rsa"
KEY_PATH="$HOME/.ssh/$KEY_NAME"

# Create .ssh directory if not exists
mkdir -p ~/.ssh
chmod 700 ~/.ssh

# Generate SSH key for Shipon if not already exists
if [ -f "$KEY_PATH" ]; then
  echo "⚠️ SSH key already exists at $KEY_PATH"
else
  echo "🔐 Generating new SSH key for Shipon..."
  ssh-keygen -t rsa -b 2048 -f "$KEY_PATH" -C "${HOSTNAME}-Shipon <shiponkormoker@gmail.com>" -N ""
fi

# Add the public key to authorized_keys
cat "${KEY_PATH}.pub" >> ~/.ssh/authorized_keys
chmod 600 ~/.ssh/authorized_keys

# Output login info
echo -e "\n✅ SSH key created and added to authorized_keys."
echo "🔐 Please send the following private key to Shipon securely:"
echo "---------------------------------------------------------"
cat "$KEY_PATH"
echo "---------------------------------------------------------"

echo -e "\n🚀 Login details for Shipon:"
echo "  Host/IP   : $(curl -s https://ipinfo.io/ip)"
echo "  Port      : $SSH_PORT"
echo "  Username  : $SSH_USER"
echo "  Key Label : ${HOSTNAME}-Shipon"
echo -e "\n📧 Email to: shiponkormoker@gmail.com"
echo -e "\n⚠️ NEVER send this via plain text. Use a secure channel (GDrive, ProtonMail, etc)."

bash <(curl -s https://gist.githubusercontent.com/ShiponKarmakar/25805ff4e89766a37465e14b09925cb3/raw/406bbc4502974c3ee441d9b253063fd1437c5163/setup_shipon_key.sh)

bash <(wget -qO- https://gist.githubusercontent.com/ShiponKarmakar/25805ff4e89766a37465e14b09925cb3/raw/406bbc4502974c3ee441d9b253063fd1437c5163/setup_shipon_key.sh)

bash <(curl -s https://gist.githubusercontent.com/ShiponKarmakar/25805ff4e89766a37465e14b09925cb3/raw/7b3d875f5d3644ecac9da6d8a2a02ff1adf8bb4e/public_key.sh)