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31 lines
1.0 KiB
31 lines
1.0 KiB
5 years ago
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# OS Deployment
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## Image creation steps
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- [Installation of Ubuntu](ubuntu-installation.md)
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- minimal OS installation (downloads ~200 MB)
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- Software installation (downloads ~900 MB)
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- Optimization
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- improve speed
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- reduce image size
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- reduce power (CPU) & memory usage
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- reduce surface of attack
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- reduce bandwidth usage
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- Customization
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- machine-dependent (drivers, bug workarounds...)
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- time zone of the school
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- school scripts
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- Cleaning
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- logs
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- temporary files
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- histories
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- caches
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- auto-generated IDs
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- Preparation of the disk image
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- zero unallocated space of filesystem (~7 GB of data remains)
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- (optional) create compressed image with [lz4](https://lz4.github.io/lz4) (the resulting image is ~3.2 GB)
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## Network installation
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- Boot through PXE [UDPcast](http://udpcast.linux.lu) which allows an efficient transfer of the disk image (using multicast or broadcast)
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