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Studio Control Host & Remote Access

Studio Control Host & Remote Access (pikvm-studio & bmo95)

This page details the management nodes, network topology, SSH agent authentication chain, and operating system configurations for remote studio management.

1. Remote Access & SSH Socket Topology

All studio infrastructure is accessible securely through host ul via forwarded SSH authentication sockets:

+---------------------------------------------------------------------------------+
| Workstation (luket7)                                                            |
| - SSH Auth Socket: /usr/local/google/home/luket/.config/ssh_auth_sock/link       |
+---------------------------------------------------------------------------------+
                                         |
                                         | SSH with Agent Forwarding
                                         v
+---------------------------------------------------------------------------------+
| Host: ul (ul.drheck.dev)                                                        |
| - Infrastructure Gateway                                                        |
| - Agent Socket Dir: ~/.ssh/agent/                                               |
+---------------------------------------------------------------------------------+
                    |                                             |
                    | SSH                                         | SSH
                    v                                             v
+---------------------------------------+     +-----------------------------------+
| Host: pikvm-studio                    |     | Host: bmo95                       |
| - IP: Static / DHCP Reservation       |     | - 48-Channel FireWire DAW Host    |
| - PiKVM V4 Plus Management            |     | - Linux 6.13 PREEMPT_RT Kernel    |
| - Sub-GHz RF Studio Power Automation  |     | - JACK & ALSA Real-time Audio     |
+---------------------------------------+     +-----------------------------------+

2. pikvm-studio Specifications & Filesystem Model

  • Hardware: PiKVM V4 Plus (Raspberry Pi 4 Model B, 2GB RAM)
  • Operating System: Arch Linux ARM (aarch64, Linux 6.12.100-1-rpi)
  • Attached Peripherals:
    • PiKVM V4 Plus capture & ATX power control board
    • Great Scott Gadgets YARD Stick One (1d50:605b, USB Bus 001)

Read-Only Root Filesystem (ro / rw)

To prevent SD card corruption during sudden power losses, pikvm-studio boots with a read-only root filesystem (/ mounted ro).

Modification Workflow

When installing new utilities, Python libraries, or modifying configuration:

# 1. Remount root partition as read-write
$ sudo rw

# 2. Make file modifications or package updates
$ sudo cp /tmp/studio-power /usr/local/bin/studio-power
$ sudo chmod +x /usr/local/bin/studio-power

# 3. Remount root partition back to read-only
$ sudo ro

Temporary work, logs, and transient scripts can also be written to /tmp (tmpfs) without switching to rw mode.

3. bmo95 Audio Host Specifications

  • Architecture: x86_64
  • Kernel: Linux 6.13.0-rt-preempt
  • Audio Interfaces: 4x Echo AudioFire12 IEEE-1394a via dual Texas Instruments XIO2213B PCIe controllers
  • Configuration Repository: ~/git/audio_config
  • Service Manager: systemd user session units (jack.service, zita-*-*.service)