mos-docs

System

The System menu provides core configuration options that control system identity, localization, power behavior, notifications, time synchronization, and network proxy settings.

The System menu is located under:

Settings → System Configuration → System

These settings affect global system behavior and should be configured carefully.

Example:

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General System Settings

Hostname

Defines the system hostname.

Default:

• MOS

Notes:

• Used for network identification
• Changes may require reconnecting to the system UI

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Keymap

Defines the system keyboard layout.

Default:

• de-latin1-nodeadkeys

Use cases:

• Console access
• Local keyboard input

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Timezone

Defines the system timezone.

Default:

• Europe/Vienna

Notes:

• Affects logs, cron jobs, and scheduled tasks
• Should match the physical system location

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CPU Governor

Defines the CPU frequency scaling policy.

Default:

• ondemand

Common options:

• ondemand – Dynamic scaling based on current system load
• performance – Forces maximum CPU frequency
• powersave – Forces minimum CPU frequency to reduce power consumption
• conservative – Gradual frequency scaling with slower ramp-up, optimized for power efficiency

Recommendation:
Use ondemand for balanced performance and efficiency.

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Global Spindown (minutes)

Defines the idle time before disks are spun down.

Default:

• 20 minutes

Notes:

• Reduces power consumption and noise
• Excessively low values may increase disk wear

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Persist History

• Enable / Disable

Controls whether command and system history is preserved across reboots.

Use cases:

• Enable for auditing and troubleshooting
• Disable for privacy-focused or minimal systems

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Display Settings

Powersave

Controls display power-saving behavior.

Default:

• Enabled

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Powerdown

Defines the time before the display is powered down.

Default:

• 60 minutes

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Timeout

Defines the inactivity timeout for the user interface.

Default:

• 30 minutes

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Notification Sounds

Controls system notification sounds.

Sound on Reboot

• Enable / Disable

Sound on Shutdown

• Enable / Disable

Sound on Startup

• Enable / Disable

Notes:

• Useful for local systems
• Can be disabled for headless or silent environments

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NTP (Time Synchronization)

NTP Enabled

• Enable / Disable

Enables or disables network time synchronization.

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NTP Mode

Defines the NTP synchronization mode.

Default:

• iburst

Note:
iburst allows faster initial synchronization.

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NTP Servers

Defines the NTP servers used for time synchronization.

Default servers:

• 0.pool.ntp.org
• 1.pool.ntp.org

Notes:

• Additional servers can be added
• Custom or local NTP servers are supported

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Proxy Settings

Defines global proxy configuration for outbound network traffic.

HTTP Proxy

Defines the HTTP proxy server.

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HTTPS Proxy

Defines the HTTPS proxy server.

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FTP Proxy

Defines the FTP proxy server.

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No Proxy

Defines addresses or domains that bypass the proxy.

Examples:

• localhost
• 127.0.0.1
• .local

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Summary

The System menu centralizes essential configuration options that affect the entire OS.

Key areas covered:

• System identity and localization
• Power and performance behavior
• UI display and notification settings
• Time synchronization via NTP
• Network proxy configuration

Correct system configuration is critical for stability, performance, and predictable behavior.

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