Linux

Implementation

Linux support uses the filesystem-based approach, reading from /sys and /proc.

Technologies Used

• sysfs (/sys) - DMI hardware information
• procfs (/proc) - Hostname and system info
• xrandr - Display refresh rate
• sysinfo crate - Storage information
• battery crate - Battery status

Data Sources

Information	File Path
Hostname	/proc/sys/kernel/hostname or /etc/hostname
Manufacturer	/sys/class/dmi/id/sys_vendor
Model	/sys/class/dmi/id/product_name
UUID	/sys/class/dmi/id/product_uuid or /etc/machine-id
Serial	/sys/class/dmi/id/product_serial

Testing

# Show all DMI information
ls -la /sys/class/dmi/id/
cat /sys/class/dmi/id/*

# Specific fields
cat /sys/class/dmi/id/sys_vendor
cat /sys/class/dmi/id/product_name
cat /sys/class/dmi/id/product_uuid

# Hostname
cat /proc/sys/kernel/hostname

# Refresh rate (X11)
xrandr --current | grep '*'

Permission Requirements

Some files may require root access:

# Serial number often requires root
sudo cat /sys/class/dmi/id/product_serial

# UUID may require root on some systems
sudo cat /sys/class/dmi/id/product_uuid

Special Cases

ARM Devices

On ARM devices (Raspberry Pi, etc.), DMI information may not be available. Device tree is used instead:

cat /proc/device-tree/model

Virtual Machines

Virtual machines show hypervisor information:

# QEMU/KVM
cat /sys/class/dmi/id/sys_vendor
# Output: QEMU

Wayland

Display refresh rate detection uses xrandr (X11). On Wayland-only systems, refresh rate may be unavailable.