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mention nixos installer detection
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README.md
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README.md
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## Requirements
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- x86_64 Linux system with kexec support (most x86_64 machine do have kexec support)
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`nixos-remote` can detect nixos installer if those contain the identifier
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`VARIANT=installer` in their `/etc/os-release` file. This is the case for the
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nixos-unstable installer and will be also part of nixos 23.05. If installer is
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detected `nixos-remote` will not try to kexec into its own image.
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If your system is not booted into a nixos installer than the following
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requirements apply for kexec to succeed:
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- x86_64 Linux system with kexec support (most x86_64 machine do have kexec
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support) or you have to provide your own [image](https://github.com/numtide/nixos-anywhere#using-your-own-kexec-image)
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- At least 2.5GB RAM (swap does not count). If you do not have enough RAM you
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will see failures unpacking the initrd), this is because kexec needs to load
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the whole nixos into memory.
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