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There are various ways this can be done. For instance, you can muck with the registry using standard registry-editing tools. However, there is also a way to affect this using the command line. As that is likely easier for automation, that is a good way to demonstrate this. Since your question showed up a made up extension of .abc, I use that. From a ...


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This also works with .zip Basically, the start of a "ZIP file" is a known header (which starts with "PK"). A program which knows how to handle ZIP files can search any file for a known header, and then treat that header and all later bytes like a ZIP file. For instance, Info-Zip contains executable files named "unzipsfx.exe". There are various versions ...


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There is also the option to specify the compression program using -I. This can include the compression level option. tar -I 'gzip -9' -cvf file.tar.gz /path/to/directory


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If I were to take a guess, you are using your computer to decompress/unarchive the file on the NAS. This means you are transferring parts of the file from the NAS to your computer, which is a major bottleneck. You would save time by transferring the archive to your computer first and then decompressing it.


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You've discovered one of the reasons why zip files are so popular as phish/virus email attachments. Windows has the built in ability to read the contents of a non-password protected zip file just like it was a folder with uncompressed contents. I shut that function off back when I was running Windows XP.


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Generally speaking, compressed archives keep a file and folder table inside so that when viewing an archive, you can choose what you want to extract. If you try to open one or more files/folders, the compression program will have to uncompress the that data.


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Sorry, but this will largely be a waste of time. The way that data compression works is to identify patterns/assumptions, and represent those in a more efficient way. However, the end result doesn't tend to create compressible patterns. It is possible to take some data which has been compressed rather lousy, and compress it more aggressively, and get some ...



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