Add systemd-based USB auto-mount setup script
Created setup_usb_automount.sh to solve fstab auto-mount issues with modern systemd-based Raspberry Pi OS. Features: - Creates systemd .mount and .automount units - Extracts UUIDs from existing /etc/fstab automatically - Allows manual UUID entry if not found - Auto-mounts when USB drives are accessed (on-demand) - Works even if USB drives are plugged in after boot - Proper user permissions (uid/gid) - Easy enable/disable via systemctl This solves the issue where fstab entries don't auto-mount because USB drives aren't present at boot time or systemd has different mounting priorities. Usage: sudo ./setup_usb_automount.sh 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
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setup_usb_automount.sh
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173
setup_usb_automount.sh
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#!/bin/bash
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#
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# USB Auto-mount Setup using systemd
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# This creates systemd mount units that auto-mount when USB drives are inserted
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#
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set -e
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# Colors for output
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RED='\033[0;31m'
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GREEN='\033[0;32m'
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YELLOW='\033[1;33m'
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NC='\033[0m' # No Color
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echo "=========================================="
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echo "USB Auto-mount Setup (systemd)"
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echo "=========================================="
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echo ""
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# Check if running as root
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if [ "$EUID" -ne 0 ]; then
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echo -e "${RED}This script needs sudo privileges${NC}"
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echo "Please run with: sudo ./setup_usb_automount.sh"
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exit 1
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fi
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# Get the real user (not root when using sudo)
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REAL_USER=${SUDO_USER:-$USER}
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REAL_UID=$(id -u $REAL_USER)
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REAL_GID=$(id -g $REAL_USER)
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echo "Setting up auto-mount for user: $REAL_USER (UID:$REAL_UID, GID:$REAL_GID)"
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echo ""
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# Create mount points
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echo "Creating mount points..."
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mkdir -p /media/usb0 /media/usb1
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chown $REAL_UID:$REAL_GID /media/usb0 /media/usb1
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echo -e "${GREEN}✓ Mount points created${NC}"
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echo ""
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# Detect USB devices and get UUIDs
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echo "Detecting USB devices..."
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lsblk -f | grep -E "sd[a-z][0-9]|vfat|exfat|ntfs"
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echo ""
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# Function to create systemd mount unit
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create_mount_unit() {
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local uuid=$1
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local mount_point=$2
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local unit_name=$(systemd-escape -p --suffix=mount "$mount_point")
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echo "Creating systemd mount unit: $unit_name"
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cat > "/etc/systemd/system/$unit_name" <<EOF
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[Unit]
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Description=USB Drive Auto-mount ($mount_point)
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After=local-fs.target
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[Mount]
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What=UUID=$uuid
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Where=$mount_point
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Type=vfat
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Options=defaults,nofail,uid=$REAL_UID,gid=$REAL_GID,umask=0022
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[Install]
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WantedBy=multi-user.target
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EOF
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# Create corresponding automount unit
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local automount_unit="${unit_name/.mount/.automount}"
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cat > "/etc/systemd/system/$automount_unit" <<EOF
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[Unit]
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Description=USB Drive Auto-mount Trigger ($mount_point)
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[Automount]
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Where=$mount_point
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TimeoutIdleSec=5
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[Install]
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WantedBy=multi-user.target
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EOF
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echo -e "${GREEN}✓ Created $unit_name and $automount_unit${NC}"
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}
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# Get UUIDs from existing fstab or user input
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USB0_UUID=""
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USB1_UUID=""
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# Try to extract UUIDs from fstab
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if grep -q "UUID=.*usb0" /etc/fstab; then
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USB0_UUID=$(grep "usb0" /etc/fstab | grep -oP 'UUID=\K[^\s]+')
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echo "Found USB0 UUID in fstab: $USB0_UUID"
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fi
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if grep -q "UUID=.*usb1" /etc/fstab; then
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USB1_UUID=$(grep "usb1" /etc/fstab | grep -oP 'UUID=\K[^\s]+')
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echo "Found USB1 UUID in fstab: $USB1_UUID"
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fi
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echo ""
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echo "If UUIDs were not detected, please enter them manually:"
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echo ""
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if [ -z "$USB0_UUID" ]; then
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read -p "USB0 UUID (e.g., D20B-AEC0) [Enter to skip]: " USB0_UUID
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fi
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if [ -z "$USB1_UUID" ]; then
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read -p "USB1 UUID (e.g., E212-4316) [Enter to skip]: " USB1_UUID
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fi
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# Create systemd units
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echo ""
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CREATED=0
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if [ ! -z "$USB0_UUID" ]; then
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create_mount_unit "$USB0_UUID" "/media/usb0"
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CREATED=1
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fi
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if [ ! -z "$USB1_UUID" ]; then
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create_mount_unit "$USB1_UUID" "/media/usb1"
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CREATED=1
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fi
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if [ $CREATED -eq 0 ]; then
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echo -e "${YELLOW}⚠ No UUIDs provided, no units created${NC}"
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exit 0
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fi
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# Reload systemd
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echo ""
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echo "Reloading systemd daemon..."
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systemctl daemon-reload
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echo -e "${GREEN}✓ Systemd reloaded${NC}"
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# Enable and start automount units
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echo ""
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echo "Enabling auto-mount units..."
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if [ ! -z "$USB0_UUID" ]; then
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systemctl enable media-usb0.automount
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systemctl start media-usb0.automount
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echo -e "${GREEN}✓ Enabled /media/usb0 auto-mount${NC}"
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fi
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if [ ! -z "$USB1_UUID" ]; then
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systemctl enable media-usb1.automount
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systemctl start media-usb1.automount
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echo -e "${GREEN}✓ Enabled /media/usb1 auto-mount${NC}"
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fi
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echo ""
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echo "=========================================="
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echo "Setup Complete!"
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echo "=========================================="
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echo ""
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echo "USB drives will now auto-mount when accessed or plugged in"
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echo ""
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echo "To test:"
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echo " ls /media/usb0"
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echo " ls /media/usb1"
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echo ""
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echo "To check status:"
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echo " systemctl status media-usb0.automount"
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echo " systemctl status media-usb1.automount"
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echo ""
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echo "To disable (if needed):"
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echo " sudo systemctl disable media-usb0.automount"
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echo " sudo systemctl disable media-usb1.automount"
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echo ""
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