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🔵 How to create and how to open an ZIP file

ZIP files also support encryption and split archives, offering a perfect way to organize and store your files. You can also zip files to save more disk space, which is ideal for portable device users. ZIP uses many compression algorithms including the popular DEFLATE compression and is used to reduce the total size when sending files over the internet. The compression is lossless and you can unzip to regain the original size. #!/usr/bin/perlĭie "Usage: $0 in.7z out.ZIP is an archive format that allows you to compress one or more files or directories to save more space. Here's an example Perl script (requires the module Archive::Libarchive::XS). It's not too hard to write something to do the job. Remove the mount point for the ramdisk's filesystem: sudo rmdir /mnt/tmpfs.Unmount the ramdisk's filesystem: sudo umount.Run mkdir /mnt/tmpfs/tmp & 7z x -o/mnt/tmpfs/tmp & tar cf archive.tar /mnt/tmpfs/tmp & rm -rf /mnt/tmpfs/tmp * = path to the source.Mount the ramdisk's filesystem: sudo mount -t tmpfs -o size= tmpfs /mnt/ramdisk * = size of the filesystem in bytes * 10 3 (1, 1K, 1M, 1G.

Create the mount point for the ramdisk's filesystem: sudo mkdir /mnt/tmpfs.Anyway it's very easy to automate everything in a single command: mkdir tmp & 7z x -otmp & tar cf archive.tar tmp & rm -rf tmpĪlso the time required for the source archive's files to be written to the disk and for the extracted files to be read in order to / extract / rearchive the source archive in two steps is a bottleneck for the whole task mostly (altough not only) because of a potential disk's low I/O speed, so a partial solution would be to store the temporary files to a ramdisk in order to almost void the overall bottleneck: That being said, If you meant to / extract / rearchive the source archive at once, the answer is you can't, at least not using Ubuntu's default tools because tar can't read from stdin, so you can't pipe 7z and tar. 7z archive wouldn't use any compression it would still require an extraction. They differ in their scope, and in most cases a conversion would require an optional decompression always followed by an extraction of the source archive. 7z archives are archives often compressed with some kind of algorithm, while.