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how to sort access log efficiently in blocks
Access logs are more or less sorted by time, but to aggregate connections by time (uniq -c), you need to sort them a bit more. For a huge access log sort is very inefficient, because it buffers and ...
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GNU/Linux: overlay block device / stackable block device
GNU/Linux has union mount that overlays dirs. So you can mount a writeable dir on top of a read-only dir. When the writeable dir is unmounted the read-only dir is untouched.
I am looking for the same ...
