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Why does the InterWorx Control Panel backup system use .tar.gz files instead of .zip?

April 26, 2017backup CONTROL files interworx panel system

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Why does the InterWorx Control Panel backup system use .tar.gz files instead of .zip?

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The backup files are .tar.gz files (as opposed to .zip files) because the .tar compression format preserves file permissions. This is necessary if you want the backup to work when it is restored. Tar is a packaging format, not really a compression, so GZip (.gz) is used to shrink the file even further.