How it works
What a BE is
A boot environment is a bootable OS instance; it supports safer update/rollback workflows.
Activation
Creating a BE does not mean it will be selected at the next boot.
Recovery
Test alternate BE boot paths and keep capacity for snapshots and clones.
Worked examples
Each example explains the question it answers, a reproducible starting point, what to look for, and operational precautions.
1. List environments
Use this as a starting point for list environments.
beadm listInterpretation: Check command output against the expected host configuration; record the before/after state.
Operational note: Run commands in a test environment first; confirm device names, privileges and release-specific options.
2. Create safety BE
Use this as a starting point for create safety be.
beadm create pre-maintenanceInterpretation: Check command output against the expected host configuration; record the before/after state.
Operational note: Run commands in a test environment first; confirm device names, privileges and release-specific options.
3. Inspect active BE
Use this as a starting point for inspect active be.
beadm list -aInterpretation: Check command output against the expected host configuration; record the before/after state.
Operational note: Run commands in a test environment first; confirm device names, privileges and release-specific options.
4. Activate alternate BE
Use this as a starting point for activate alternate be.
beadm activate pre-maintenanceInterpretation: Check command output against the expected host configuration; record the before/after state.
Operational note: Run commands in a test environment first; confirm device names, privileges and release-specific options.
Primary documentation
Read the relevant Oracle documentation for exact version-specific flags, supported platforms and limitations: Oracle primary reference ↗.
This field manual is independent, not affiliated with or endorsed by Oracle. Command examples should be adapted to your environment.