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What is the maximum compression ratio of gzip? - Super User
2013年1月2日 · It very much depends on the data being compressed. A quick test with a 1Gb file full of zeros using a standard version of gzip (with default options or specifying -9) gives a compressed size of ~1018Kb, so your 10Kb file could potentially expand into ~10Mbytes.
What can be used to 'gzip' in Windows? - Super User
As mentioned in @djvg's answer, Windows includes tar since 2017. But those that are unwilling to install anything and wish to use gzip or gunzip to compress or decompress single files can create a System.IO.Compression.GZipStream object in PowerShell and compress or decompress by giving System.IO.Compression.CompressionMode as a parameter to it, as done in the two …
compression - Pros and cons of bzip vs gzip? - Super User
2010年10月30日 · Gzip and bzip2, as well as xz and lzop, are functionally equivalent. (There once was a bzip, but it seems to have completely vanished off the face of the world.) Other common compression formats are zip, rar and 7z; these three do both compression and archiving (packing multiple files into one).
How to password protect gzip files on the command line?
2010年7月12日 · Using gzip and aespipe $ cat clear_text | gzip | aespipe > clear_text.gz.aes #Compress & Encrypt $ cat clear_text.gz.aes | aespipe -d | gunzip > clear_text #Decrypt & Decompress aespipe is what it sounds like, a program that takes input on stdin and outputs aes encrypted data on stdout.
How to gzip multiple files into one gz file? - Super User
2011年3月29日 · Quoth the gzip manpage: If you wish to create a single archive file with multiple members so that members can later be extracted independently, use an archiver such as tar or zip. GNU tar supports the -z option to invoke gzip transparently. gzip is designed as a complement to tar, not as a replacement
macos - Command to 'gzip' a folder? - Super User
2010年7月9日 · gzip -cd filename.ext.gz > anotherfile gunzip -c filename.ext.gz > anotherfile Another quick way of reading the content of a gzip to standard output is zcat , it's basically the same as calling gzip -cd but you can call multiple files and have them concatenated the same way as the cat command concats text files.
What is the difference in gzip compression levels? - Super User
2016年10月12日 · From what I have read regarding DEFLATE (what gzip uses), the levels specify the amount of time the algorithm spends finding repetition in bytes and encoding the data properly. I don't quite understand how this would differ between one pass of a file or multiple passes of a file.
linux - How do I know the gzip compression level? - Super User
2011年4月12日 · Looks like the rest of a compressed file isn't any clearer. Test-compressing a 201 bytes file with all levels resulted in only 4 different outputs - partitioned by levels as (1,23,45678,9) - with levels 1 and 9 specifically marked (see XFL in RFC1952; that's why file can recognise those).
gzip without tar? Why are they used together? - Super User
GZIP compresses a single file into another single file, but does not create archives. File Format...Although its file format also allows for multiple such streams to be concatenated (zipped files are simply decompressed concatenated as if they were originally one file), gzip is normally used to compress just single files.[4]
What happened to .gzip option in 7-zip? - Super User
2015年8月8日 · Perhaps I am missing something. But is there a way to archive a file/directory in a .gzip format in Win10? If so, could anyone please advise where/how to select the .gzip option? Thanks! Edit: I tested 7-zip on Win 7 and also I tried to gzip .txt file and a .tar file in Win10. Here are my findings: I can gzip a .txt file in Win 7.