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====== Universal Linux Host Baseline Tuning ======

Apply these baseline configurations immediately across all Linux hosts—including the bare-metal Media Server (Plex), the virtualized Acquisition Server (ARR Stack), the virtualized Requests Server (Overseerr), and the Raspberry Pi 5 Edge Proxy node—to unify their behavior under the management plane.

===== Kernel Performance Profiling =====
Open the primary system kernel configuration file (''/etc/sysctl.conf'') on each Linux instance. 

Append the following entries to enhance throughput and connection stability under high-concurrency network loads, such as concurrent media streams or automated peer-to-peer data transfers:

<file bash /etc/sysctl.conf>
# Increase maximum open files limits for handling vast media collections
fs.file-max = 2097152

# Enhance the network stack's capacity for memory allocation
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
</file>

Apply these parameters instantly to your active runtime environment without requiring a system restart by executing:
<code>
sudo sysctl -p
</code>

===== Non-Interactive System Update Behavior =====
To prevent unexpected application interruptions or unplanned reboots during active operational hours, modify your automated package management rules.

  - Open the unattended-upgrades configuration file:
<code>
sudo nano /etc/apt/apt.conf.d/50unattended-upgrades
</code>

  - Locate the automatic reboot statement and change the value explicitly to ''false'':
<file bash /etc/apt/apt.conf.d/50unattended-upgrades>
Unattended-Upgrade::Automatic-Reboot "false";
</file>

**Architectural Note:** Hard-coding this parameter to ''false'' guarantees that security patches are downloaded and staged safely, but critical system components are only rebooted during your manually scheduled, documented infrastructure maintenance windows.