scripts added

sshupdate.sh

@@ -0,0 +1,91 @@
+#!/usr/bin/env bash
+
+set -e
+
+echo "==============================="
+echo " SSH Configuration Script"
+echo "==============================="
+
+SSHD_CONFIG="/etc/ssh/sshd_config"
+
+# -------------------------------
+# Install SSH Key
+# -------------------------------
+echo "Installing SSH key..."
+
+SSH_KEY="ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIDosb5jR9eu4Avc0HmMzR8HQDYOGRSxwRYgprpDuggDG eddsa-key-20260531"
+
+mkdir -p ~/.ssh
+chmod 700 ~/.ssh
+
+grep -qxF "$SSH_KEY" ~/.ssh/authorized_keys 2>/dev/null || echo "$SSH_KEY" >> ~/.ssh/authorized_keys
+chmod 600 ~/.ssh/authorized_keys
+
+echo "✅ Key installed"
+
+# -------------------------------
+# Backup config
+# -------------------------------
+cp ${SSHD_CONFIG} ${SSHD_CONFIG}.bak.$(date +%s)
+
+# -------------------------------
+# SSH SETTINGS
+# -------------------------------
+echo "Updating SSH settings..."
+
+# Pubkey
+if grep -q "^PubkeyAuthentication" "$SSHD_CONFIG"; then
+  sed -i "s/^PubkeyAuthentication.*/PubkeyAuthentication yes/" "$SSHD_CONFIG"
+else
+  echo "PubkeyAuthentication yes" >> "$SSHD_CONFIG"
+fi
+
+# Password (initially enabled for safety)
+if grep -q "^PasswordAuthentication" "$SSHD_CONFIG"; then
+  sed -i "s/^PasswordAuthentication.*/PasswordAuthentication yes/" "$SSHD_CONFIG"
+else
+  echo "PasswordAuthentication yes" >> "$SSHD_CONFIG"
+fi
+
+# KbdInteractive ✅
+if grep -q "^KbdInteractiveAuthentication" "$SSHD_CONFIG"; then
+  sed -i "s/^KbdInteractiveAuthentication.*/KbdInteractiveAuthentication yes/" "$SSHD_CONFIG"
+else
+  echo "KbdInteractiveAuthentication yes" >> "$SSHD_CONFIG"
+fi
+
+# ChallengeResponse
+if grep -q "^ChallengeResponseAuthentication" "$SSHD_CONFIG"; then
+  sed -i "s/^ChallengeResponseAuthentication.*/ChallengeResponseAuthentication yes/" "$SSHD_CONFIG"
+else
+  echo "ChallengeResponseAuthentication yes" >> "$SSHD_CONFIG"
+fi
+
+systemctl restart ssh
+
+echo "✅ SSH restarted"
+
+# -------------------------------
+# Optional Lockdown
+# -------------------------------
+read -p "Disable password login? (y/N): " DISABLE_PASS
+
+if [[ "$DISABLE_PASS" =~ ^[Yy]$ ]]; then
+  sed -i "s/^#*PasswordAuthentication.*/PasswordAuthentication no/" "$SSHD_CONFIG"
+  systemctl restart ssh
+  echo "✅ Password login disabled"
+fi
+
+read -p "Disable root login? (y/N): " DISABLE_ROOT
+
+if [[ "$DISABLE_ROOT" =~ ^[Yy]$ ]]; then
+  sed -i "s/^#*PermitRootLogin.*/PermitRootLogin no/" "$SSHD_CONFIG"
+  systemctl restart ssh
+  echo "✅ Root login disabled"
+fi
+
+echo ""
+echo "==============================="
+echo " ✅ SSH CONFIG COMPLETE"
+echo "==============================="
+echo "⚠️ Test SSH access before closing your session"