# SRS-08: System Management

## 1. Overview
System Management module provides configuration and management of system services, network interfaces, time synchronization, and system administration features.

## 2. Functional Requirements

### 2.1 Network Interface Management
**FR-SYS-001**: System shall list network interfaces
- **Output**: Interface list with name, IP address, status, speed
- **Refresh**: Auto-refresh every 5 seconds

**FR-SYS-002**: System shall allow users to view interface details
- **Output**: Interface properties, IP configuration, statistics

**FR-SYS-003**: System shall allow users to update interface configuration
- **Input**: Interface name, IP address, subnet, gateway
- **Validation**: Valid IP configuration

**FR-SYS-004**: System shall display interface status
- **Output**: Connection status (Connected/Down), speed, role

### 2.2 Service Management
**FR-SYS-005**: System shall list system services
- **Output**: Service list with name, status, description
- **Refresh**: Auto-refresh every 5 seconds

**FR-SYS-006**: System shall allow users to view service status
- **Output**: Service status (active/inactive), enabled state

**FR-SYS-007**: System shall allow users to restart services
- **Input**: Service name
- **Action**: Restart service via systemd

**FR-SYS-008**: System shall allow users to start/stop services
- **Input**: Service name, action (start/stop)

**FR-SYS-009**: System shall display service logs
- **Input**: Service name
- **Output**: Recent service logs

### 2.3 NTP Configuration
**FR-SYS-010**: System shall allow users to configure timezone
- **Input**: Timezone string
- **Output**: Updated timezone

**FR-SYS-011**: System shall allow users to configure NTP servers
- **Input**: NTP server list
- **Output**: Updated NTP configuration

**FR-SYS-012**: System shall allow users to add NTP servers
- **Input**: NTP server address
- **Validation**: Valid NTP server address

**FR-SYS-013**: System shall allow users to remove NTP servers
- **Input**: NTP server address

**FR-SYS-014**: System shall display NTP server status
- **Output**: Server status, stratum, latency

### 2.4 SNMP Configuration
**FR-SYS-015**: System shall allow users to enable/disable SNMP
- **Input**: Enabled flag
- **Action**: Enable/disable SNMP service

**FR-SYS-016**: System shall allow users to configure SNMP community string
- **Input**: Community string
- **Output**: Updated SNMP configuration

**FR-SYS-017**: System shall allow users to configure SNMP trap receiver
- **Input**: Trap receiver IP address
- **Output**: Updated SNMP configuration

### 2.5 System Logs
**FR-SYS-018**: System shall allow users to view system logs
- **Output**: System log entries with timestamp, level, message
- **Filtering**: By level, time range, search

### 2.6 Terminal Console
**FR-SYS-019**: System shall provide terminal console access
- **Input**: Command string
- **Output**: Command output
- **Validation**: Allowed commands only (for security)

### 2.7 Feature License Management
**FR-SYS-020**: System shall display license status
- **Output**: License status (active/expired), expiration date, days remaining

**FR-SYS-021**: System shall display enabled features
- **Output**: Feature list with enabled/disabled status

**FR-SYS-022**: System shall allow users to update license key
- **Input**: License key
- **Validation**: Valid license key format
- **Action**: Update and validate license

**FR-SYS-023**: System shall allow users to download license information
- **Output**: License information file

### 2.8 System Actions
**FR-SYS-024**: System shall allow users to reboot system
- **Action**: System reboot (with confirmation)

**FR-SYS-025**: System shall allow users to shutdown system
- **Action**: System shutdown (with confirmation)

**FR-SYS-026**: System shall allow users to generate support bundle
- **Output**: Support bundle archive

## 3. User Interface Requirements

### 3.1 System Configuration Dashboard
- Network interfaces card
- Service control card
- NTP configuration card
- Management & SNMP card
- Feature License card

### 3.2 Network Interface Management
- Interface list with status indicators
- Interface detail modal
- Edit interface modal

### 3.3 Service Control
- Service list with toggle switches
- Service status indicators
- Service log viewing

### 3.4 License Management
- License status display
- Enabled features list
- Update license key modal
- Download license info button

## 4. API Endpoints

```
GET    /api/v1/system/interfaces
PUT    /api/v1/system/interfaces/:name

GET    /api/v1/system/services
GET    /api/v1/system/services/:name
POST   /api/v1/system/services/:name/restart
GET    /api/v1/system/services/:name/logs

GET    /api/v1/system/ntp
POST   /api/v1/system/ntp

GET    /api/v1/system/logs
GET    /api/v1/system/network/throughput

POST   /api/v1/system/execute
POST   /api/v1/system/support-bundle
```

## 5. Permissions
- **system:read**: Required for viewing interfaces, services, logs
- **system:write**: Required for updating configuration, executing commands

## 6. Error Handling
- Invalid IP configuration
- Service not found
- Service restart failures
- Invalid NTP server
- License validation errors
- Insufficient permissions