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Gzip Tool For Mac
I am new to Mac command prompt stuff. How do you create a gzip of a folder in Mac OS X? I was told by a few folks that if you want to create a gzip of a folder you should 'tar' it first and then 'gzip' it. Is this correct?
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6 Answers
Tar is the archive tool and gzip is the compression tool. In order to compress a full directory, first you need to archive it to a single file. That's what the job is tar. and then you compress the archived file. You can do both task in a single tar command with proper option.
If you don't want to make a tar archive (may be you want to compress just a single file), then you can use gzip command directly.
It will create a compressed file named file.txt.gz
taskinoortaskinoorIf somebody is still finding this question when searching 'gzip in Mac', I wrote a guide that it may be useful to somebody else. Here it goes:
Compressing
The most basic command will compress the file filename.ext and then replace it with filename.ext.gz in the same directory.
If you don't want to lose your original file, then you need to pipe the output of gzip -c to a file.
We can also compress from standard input, so we can compress the output of other commands.
OS X also comes with the compress and uncompress commands. They make for a 'smarter' gzip, as it doesn't compress the file if it would grow after the compression process. The following command replaces filename.ext with filename.ext.Z in the same directory.
Decompressing
To restore a file to it's uncompressed natural state you can use gzip or other of the wrappers. The decompression mode of gzip is called with the -d flag. This mode will replace the file filename.ext.gz with filename.ext in the same directory. There's also a shortcut called gunzip that will do the same.
We can also pipe the decompressed file to the standard output to save it to another file.
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. The only drawback is that your files need to be suffixed with the .Z suffix for it to work..
But fear not! zcat it's still useful, because it can decompress from standard output. So you can basically pipe your files to zcat to have them decompressed on the terminal window.
This is very useful if you need to check the content of a file really quick, and you can even save the output of zcat to a file, just as easy.
The uncompress wrapper works like gzip -cd but it looks for files with the .Z extension to replace them in the current directory, so you only need to specify the file name you want to restore, but it's alright if you call it with the .Z extension, as the program will ignore it.
I hope you find my guide useful :)
MacOS X is Unix so this should work (this work on GNU/Linux)
jcubicjcubicYes, you have do tar the directory first. The tar-command can do both:
Unzip Tool For Mac
extract your archiv:
To add to the answer by @taskinoor: if you use single file version, aka
be aware that the original file (file.txt) will be removed and you'll have only file.txt.gz
I would put this as comment but dont have enough karma to do that :=)
Yes, this is correct. gzip can only compress a file. tar encodes the directory contents into a single file, which can be further compressed using gzip, bzip2, lzma or anything else.