Overview
systemd-repart reduces the hassle of manual partition adjustments for system administrators, enabling flexible disk management, especially in cloud or embedded environments.
Key Features
- Automatic Partition Expansion: Expands existing partitions to utilize available space.
- New Partition Creation: Creates new partitions based on defined rules.
- JSON-based Configuration: Defines partition layouts via JSON files located in /etc/repart.d/ or /usr/lib/repart.d/.
- Safe Simulation: Allows previewing results without actual changes using the --dry-run option.
Key Options
systemd-repart provides various options to control the details of partition operations.
Execution Control
Generated command:
Try combining the commands.
Description:
`systemd-repart` Executes the command.
Combine the above options to virtually execute commands with AI.
Usage Examples
systemd-repart is typically invoked by system boot scripts or management tools, but it can be run manually to simulate or apply partition changes.
Simulate Partition Changes (Most Important)
sudo systemd-repart --dry-runCheck in advance what operations systemd-repart will perform without making actual changes. This option must be used before applying changes.
View Simulation Results in JSON Format
sudo systemd-repart --dry-run --json=prettyOutput simulation results in JSON format for programmatic analysis.
Simulate Partition Changes with Specific Definition Files
sudo systemd-repart --dry-run --definitions=/path/to/custom/repart.dSimulate using partition definition files located in a specific directory, not the default path.
Apply Actual Partition Changes (Use with Caution)
sudo systemd-repartAfter thoroughly reviewing with dry-run, apply actual partition changes. This operation carries a risk of data loss, so it must be performed cautiously after backing up.
Tips & Precautions
When using systemd-repart, prioritize data safety and system stability.
Key Usage
- Always use --dry-run first: Before applying any actual changes, always use the `--dry-run` option to verify the expected modifications.
- Data backup is essential: Partition changes carry a risk of data loss, so always back up important data.
- repart.d definition files: systemd-repart reads JSON-formatted partition definition files from `/usr/lib/repart.d/` and `/etc/repart.d/` to perform its operations. Understanding and modifying these files is crucial.
- Usage during system boot: This command is primarily used automatically during the system's first boot or OS update process to adjust partition layouts. Manual execution is recommended only for specific purposes.