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A comment on Ask HN: Linux laptop with MacBook-like build quality. Parent comment
Depending on where the ssh server is (source or target):
dd if=/dev/sda | ssh -C 1.2.3.4 dd of=/dev/sda ssh -C 1.2.3.4 dd if=/dev/sda | dd of=/dev/sda
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Depending on where the ssh server is (source or target):
† or mount the source / as ro, or systemd-switchroot to a ramdisk. Just make sure that source / is not getting writes. Or not, if you don't care.