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xpetit
3 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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