diff --git a/install_v2.sh b/install_v2.sh
index 60e8abf..3742113 100644
--- a/install_v2.sh
+++ b/install_v2.sh
@@ -1,5 +1,5 @@
 #!/bin/bash
-# Script to install JupyterHub (via TLJH) and RStudio Server on Ubuntu 24.04 LTS
+# Script to install RStudio Server and then JupyterHub (via TLJH) on Ubuntu 24.04 LTS
 
 # --- Configuration ---
 # Set the desired admin username and password for JupyterHub
@@ -8,31 +8,60 @@ ADMIN_USER="your_admin_user"
 ADMIN_PASSWORD="your_admin_password"
 
 # RStudio Server .deb package URL for Ubuntu 22/24 (noble/jammy)
-# Always check the Posit website for the latest version and correct URL
 RSTUDIO_DEB_URL="https://download2.rstudio.org/server/jammy/amd64/rstudio-server-2023.12.1-402-amd64.deb"
 RSTUDIO_DEB_FILENAME="rstudio-server.deb"
 # ---------------------
 
-echo "--- Updating and installing prerequisites ---"
+echo "--- Installing base prerequisites and updating system ---"
 apt update
 apt upgrade -y
-apt install -y curl git gdebi-core software-properties-common dirmngr ufw
+# Install key dependencies including PAM components and gdebi
+apt install -y curl git gdebi-core software-properties-common dirmngr ufw libpam-systemd libnss-systemd
 
-# Enable and configure UFW firewall
+# --- Configure Firewall (UFW) ---
 echo "--- Configuring UFW firewall ---"
-ufw allow 80/tcp  # For JupyterHub/TLJH (HTTP)
-ufw allow 443/tcp # For JupyterHub/TLJH (HTTPS)
-ufw allow 8787/tcp # For RStudio Server
-ufw enable -y
+ufw allow 80/tcp    # For JupyterHub/TLJH (HTTP)
+ufw allow 443/tcp   # For JupyterHub/TLJH (HTTPS)
+ufw allow 8787/tcp  # For RStudio Server
+ufw --force enable
 echo "Firewall configured: Ports 80, 443, and 8787 allowed."
 
-# ----------------------------------------------------
-# 1. Install The Littlest JupyterHub (TLJH)
-# ----------------------------------------------------
-echo "--- Installing The Littlest JupyterHub (TLJH) ---"
-# TLJH is a robust and easy way to install a single-server JupyterHub instance.
-# It automatically installs Python, JupyterHub, a proxy, and configuration.
+---
+## 1. Install R and RStudio Server First 📦
+echo "--- Installing R and RStudio Server ---"
 
+# 1a. Install R base and add the CRAN repository
+echo "--- Adding CRAN repository and installing R ---"
+# Add key for CRAN
+wget -qO- https://cloud.r-project.org/bin/linux/ubuntu/marutter_pubkey.asc | gpg --dearmor | tee /etc/apt/trusted.gpg.d/cran_ubuntu_key.gpg >/dev/null
+
+# Add CRAN repository for Ubuntu Noble (24.04)
+add-apt-repository -y "deb https://cloud.r-project.org/bin/linux/ubuntu noble-cran40/"
+apt update
+apt install -y r-base r-base-dev
+
+# 1b. Download and Install RStudio Server
+echo "--- Downloading and installing RStudio Server ---"
+wget "$RSTUDIO_DEB_URL" -O "$RSTUDIO_DEB_FILENAME"
+gdebi --n "$RSTUDIO_DEB_FILENAME"
+rm "$RSTUDIO_DEB_FILENAME"
+
+# 1c. Set Explicit R Path (Crucial for stability)
+echo "--- Setting RStudio R path configuration ---"
+echo "rsession-which-r=/usr/bin/R" | sudo tee -a /etc/rstudio/rserver.conf
+
+# 1d. Create and secure RStudio session directory (Crucial for preventing permission errors)
+echo "--- Fixing RStudio session permissions ---"
+mkdir -p /var/lib/rstudio/sessions
+chown -R rstudio-server:rstudio-server /var/lib/rstudio
+systemctl restart rstudio-server
+echo "RStudio Server installed and configured."
+
+---
+## 2. Install The Littlest JupyterHub (TLJH)
+echo "--- Installing The Littlest JupyterHub (TLJH) ---"
+
+# TLJH installs Python, JupyterHub, the proxy, and creates the admin user
 curl -L https://tljh.jupyter.org/bootstrap.py | sudo -E python3 - \
     --admin "$ADMIN_USER":"$ADMIN_PASSWORD"
 
@@ -41,50 +70,19 @@ if [ $? -ne 0 ]; then
     exit 1
 fi
 echo "JupyterHub (TLJH) installed successfully."
-echo "JupyterHub will be accessible via HTTP on port 80/443."
 
-# ----------------------------------------------------
-# 2. Install R and RStudio Server
-# ----------------------------------------------------
-echo "--- Installing R and RStudio Server ---"
+---
+## 3. Final Compatibility Fix (The most important step for RStudio after TLJH)
+# TLJH installs its own PAM configuration. We must tell RStudio to use the standard system PAM profile for sessions.
+echo "--- Applying TLJH/RStudio compatibility fix ---"
+ln -s /etc/pam.d/login /etc/pam.d/rstudio
 
-# 2a. Install R base and add the CRAN repository
-echo "--- Adding CRAN repository and installing R ---"
-# Key for CRAN
-wget -qO- https://cloud.r-project.org/bin/linux/ubuntu/marutter_pubkey.asc | gpg --dearmor | tee /etc/apt/trusted.gpg.d/cran_ubuntu_key.gpg >/dev/null
-
-# Add CRAN repository (noble is Ubuntu 24.04 codename)
-# We use the older 'jammy-cran40' as the noble repository might not be fully populated yet or for compatibility
-add-apt-repository -y "deb https://cloud.r-project.org/bin/linux/ubuntu noble-cran40/"
-apt update
-apt install -y r-base
-
-# 2b. Download and Install RStudio Server
-echo "--- Downloading and installing RStudio Server ---"
-wget "$RSTUDIO_DEB_URL" -O "$RSTUDIO_DEB_FILENAME"
-
-# Use gdebi to install the .deb package and resolve dependencies
-gdebi --n "$RSTUDIO_DEB_FILENAME"
-
-# Clean up
-rm "$RSTUDIO_DEB_FILENAME"
-
-if [ $? -ne 0 ]; then
-    echo "WARNING: RStudio Server installation might have failed. Check dependencies."
-else
-    echo "RStudio Server installed successfully."
-fi
-
-# ----------------------------------------------------
-# 3. Final Verification and Instructions
-# ----------------------------------------------------
-echo "--- Verification and Next Steps ---"
-echo "JupyterHub Status:"
-systemctl status jupyterhub --no-pager
-
-echo "RStudio Server Status (should be active):"
-systemctl status rstudio-server --no-pager
+# Restart both services one last time
+systemctl restart rstudio-server
+systemctl restart jupyterhub
 
+---
+## 4. Final Verification and Instructions
 echo ""
 echo "=========================================================="
 echo "✅ Installation Summary"
@@ -96,7 +94,5 @@ echo "   Password: **$ADMIN_PASSWORD**"
 echo ""
 echo "RStudio Server is running on port 8787. Access it at:"
 echo "   ➡️  http://<Your-Server-IP>:8787/"
-echo "   Login with any existing **Ubuntu system user** credentials."
-echo ""
-echo "Remember to set up HTTPS for JupyterHub using tljh-config!"
+echo "   Login with the **$ADMIN_USER** credentials created by TLJH."
 echo "=========================================================="
\ No newline at end of file