`gzip` (or GNU zip) is a file format and corresponding utility for compressing files using the DEFLATE algorithm. The usual extension is `.gz`.

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How to convert a file of format tar.gz to tar.bz2?

Like the title says, how do I do this conversion from the Linux console?
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tar: Exiting with failure status due to previous errors

I have written a little script that tars and compresses a list of directories + files. The script appears to run succesfully, in that a useable .tar.gz file is created after the script runs. However,...
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gzip compressed file ownership and permissions

I'm trying to find out how gzipping a file changes its permissions. The gzip manual (man gzip) says: Whenever possible, each file is replaced by one with the extension .gz, while keeping the ...
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2answers
481 views

Unzipping a huge file stalls the server

I want to extract a huge .tar.gz file but when I do extract it stalls the server. The server is write heavy and extracting seems to choke the disk. Is there a nice way to extract without stopping the ...
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3answers
428 views

What are good compression algorithms for delta synchronization?

When syncing large files over a slow link, it is often useful to use delta compression in order to reduce the bandwidth used. It is also useful to compress files as they take up much less space. ...
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66 views

Gzip, firmware problems

I am trying to unpackage firmware. The file command gives me this. gzip compressed data, ASCII, has CRC, extra field gzip -d gzip.gz gives this. gzip: gzip.gz has flags 0xcf -- not supported Any ...
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6answers
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How do I uncompress vmlinuz to vmlinux?

I have already tried uncompress, gzip, and all other solutions that come up as google results and these have not worked for me. To get just the image search for the GZ signature - 1f 8b 08 00. &...
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5answers
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Pros and cons of bzip vs gzip?

I've known gzip for years, recently I saw bzip being used at work. Are they basically equivalent, or are there significant pros and cons to one of them over the other?
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Files with same content but with different md5sums when gzip'd?

I don't know why this is happening, but I upload some files to Amazon S3 then delete the sent files checking their md5sum both in Amazon and locally. But recently I found this issue about the same ...
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1answer
1k views

One-click to create and extract .tar.gz files in Windows?

I'm using 7-zip latest alpha version (9.30) and I find it really inconvenient that, if I want to create a .tar.gz archive, I have to create a .tar archive first then add it to a .gz archive later. So ...
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3answers
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Is there a command to determine the compression ratio of a tar.bz2 file?

I have a file.tar.bz2 that's about 50GB and would like to extract it however I don't know how much space I will need. Is there a command to print the compression ratio of the tar.bz2 file?
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2answers
135 views

How to extract such a compressed file?

I have been asked to extract a ZIP file having in it 3 tar files and each tar file contains around 3000 gz files. I had to extract the main ZIP file first then extract the tar files second then ...
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1answer
715 views

Do curl and wget open gzipped files automatically?

I made two http calls to the same gzipped resource from two different machines - RHEL and OSX. curl http://example.com/file.gz The first call returned an expected binary output: /�IQ���} The ...
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2answers
789 views

What is the difference in various commands for compressing files in linux?

What are the commands for compressing files in linux and what are the difference between them? (for example: tar, gzip, rar). I'm working on Linux Mint 11 and doing a script for compressing files. I ...
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2answers
10k views

Is there a way to force gzip not to overwrite files on conflict?

I'm writing a script in which I'm gzipping files. There's a possibility that I might zip a file, create a file of the same name, and try to gzip this as well, e.g. $ ls -l archive/ total 4 -rw-r--r--...
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2answers
4k views

gzip several files in different directories and copy to new directory

I'm working with several files that are located in different directories that I need to compress into individual .gz files. I also need to move the compressed files to a single directory while leaving ...
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3answers
805 views

What is the equivalent unix command to a Mac OSX “Compress” menu action?

When I right-click a file in Mac OSX and select "Compress 'File Name'", what is the equivalent bash or terminal command to get the same result? Is it just gzip -9 /path/to/filename?
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.tgz file- tar: Unrecognized archive format

I'm trying to install a 10gen build of mongodb on my local mac running Mountain Lion (10.8.3): I fetch it with curl at: curl http://downloads.mongodb.org/osx/mongodb-osx-x86_64-2.4.tgz > ...
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2answers
1k views

Utility to cat/gunzip a list of files

Is there a commonly-installed Linux utility that will take a list of files and cat or gzip -d (==zcat) them based on whether the file is compressed? An example of where I just needed this is when I ...
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1answer
967 views

Why is ZFS gzip-9 compression so much worse than actually using zip files?

I am working with some very large packet capture files (~150GB across 30 files) but because of how highly redundant packet captures are, these compress to ~7% (14.29x) of their originally file size ...
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1answer
41 views

Removind same *.tar.gz archives

I have crontab event archives to .tar.gz some folder every N hours. Finally I have collection of .tar.gz files. Now I want remove duplicating archives (created while target files stays unchanged) How ...
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55 views

Is there an older version of gzip that returns different/larger outputs?

I don't know how else to phrase this question, but I stumbled upon a file which I know from the header is gzipped (1F8B0800) but I am unable to recreate the file no matter what I try (including gzip ...
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1answer
5k views

Shell Script to GZIP files without overwrite .gz files

I'm trying to create a shell script which receive as first parameter of a path to a folder which I would like to compress all files using gzip without overwrite the .gz files that already exist in ...
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1answer
261 views

gzip many files one by one

I have 100 files, n1.txt, n2.txt,… and I want to gzip each of them, but not in one file – finally I'd like to have 100 n*.txt.gz files. How can I do that in Linux with Bash?
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zcat or gunzip: proceed on error

When trying to gunzip or zcat a large number of gzip files, zcat/gunzip will terminate with this error: gzip: <gzip-file>: unexpected end of file Is there any way I can get gunzip or zcat to ...
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Did gzip destroy my log file?

I had a rather big log file. So I thought I'd gzip it before transferring it to my pc. I did gzip bla.log which gave me a tiny bla.log.gz When I extract it using gunzip bla.log.gz I get back ...
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Find out the size of a .tar.gz archive in the terminal without unpacking

I have a 32GB .tar.gz archive and I'd like to know the size of the files if I unpack this compressed archive. I'd like to avoid unpacking the archive first and than use e.g. du. Is it also possible ...
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1answer
212 views

UNIX shell command to expand files of any compressed type

Is there any UNIX shell command to expand a compressed file which type is not known in advance? I should be able to use this command to expand at least any of the following types of files, though the ...
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1answer
1k views

pfSense iso.gz doesn't seem to be a compressed iso image

I downloaded the latest pfSense ISO (pfSense-2.0.1-RELEASE-i386.iso.gz) and had 7zip extract it, but it just shows me the disk contents. I cannot extract the actual ISO file to burn it with the boot ...
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Bash command to compress folder(s) with a password

How can I compress two folders into archive file (zip, gzip or something like that) with a password on the files? For example I have folder structure: rootDir dir1 dir2 dir3 dir4 I need bash ...
0
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1answer
501 views

How to zgrep by file pattern and timestamp?

I have a list of several thousand gzip (*.gz) files that I'd like to zgrep through, but I only want to run it on files with a last-modified-timestamp on or after yesterday (11/22/2012) and that ...
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111 views

Extract a section of a tgz file

I have a 28.5 GB .tgz file which was created on the command line of a Linux computer, compressing one folder and all its many many subfolders. I now want to extract a single sub-sub folder from that ....
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2k views

Estimate compressed file size in tar.gz

I've got a set of .tar.gz files, which are duplicity backup files (either full backups or incremental ones). I'd like to compute which directories take the most space on backups. This will most ...
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1answer
363 views

Enabling GZIP compression for Firefox RSS reader

I'm trying to view an RSS feed in Firefox, but am getting the following message. Your RSS reader does not support (gzip) compression. Is it possible to enable GZIP compression in the Firefox RSS ...
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3answers
755 views

Control gzip compression rates while archiving files with tar?

I have a script which periodically backs up a directory using the command "tar -czvf [name] [directory]" but my problem is that the script has recently been putting a lot of stress on the server (...
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2k views

Tell if a .gz file is really gzipped

What is a nice command-line trick to tell if a .gz file is really gzipped, as opposed to being a non-Gzip file just named that way?
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1answer
2k views

General Compressibility Of Various File Formats [closed]

Has anyone come across list of which file formats generally compress well (in general algorithms)? Generally, text files .txt compress well, and media-files (.mp3, .avi, etc) do not compress well. I'...
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372 views

Is it possible to recover partial compressed files?

Of the most popular compression methods (7z, RAR, Zip, GZip) is there any of them that allows to retrieve the uncompressed data from a partial file? Imagine there is only one compressed file, and it ...
0
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1answer
203 views

Looking for a gtk equivalent of ark

Does there exist a GTK equivalent (or improvement) of the Linux archiving tool known as Ark? If so, where might it be found; and if not, how well-received might be a new project which acts as a front-...
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Howto pipe: cp | tar | gzip without creating intermediary files?

Can anyone tell me if it's possible to pipe | this without having to create a physical file anywhere between A and B.tar.gz? This is what I'm trying to do: File A Rename A to B Tar B.tar gzip -9 B....
2
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1answer
2k views

Zip/gzip compression ratio much less in Linux than in Windows

I have a bunch of very huge files located on a Linux machine that I would like to compress and save some space. I have tried using the tar/gzip combination and I have noticed that the compression ...
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500 views

How do I compress a directory?

Hey guys I was wondering how would I gzip 7z tar or just regular zip a directory like this /var/Backups/Tones regular gzip won't do it because Tones is a directory and this site ss64.com/bash doesn't ...
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1answer
964 views

Why my multiparted .tar unpacs just partly? (missing files)

I have 25 .tar files like: filename.tar.001 - filename.tar.025 When I want to unpack them with cat myarchive.tar.* | tar xvf - it does, but missing files: whole .tar is 1,2 GB, but unpacked files ...
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2answers
5k views

gzip for 64-bit Windows

Does anyone know any version of Gzip which supports 64-bit Windows? I could not find anything.
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How to gzip a directory, transfer via scp, and decompress in one command?

I frequently transfer large directories over scp and it would be sweet if I could somehow compress the directory, send it, and decompress it all in one. Is something like this possible?
2
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1answer
156 views

Difference between caching & gzip for static pages

I have implemented all caching methods such as, memcache, diskcache, and also tried GZIP. Is there any source I can refer to which explains the difference between them. I tried memcache it is really ...
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Fastest GZIP utility

I'm looking for the fastest gzip (or zip) utility. I have a LVM volume which 95% exists out of blank 0's, so compressing that is very easy. I'm looking for the most fastest solution, and don't really ...
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1answer
2k views

How to gzip more than one file using cygwin [duplicate]

Possible Duplicate: How to gzip multiple files into one gz file? I am trying to gzip a bunch of files in the same folder using cgywin on windows 7. When I try gzip *.* I can't seem to ...
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226 views

Modern command line file compression utilities

I am frequently moving large files around from server to server. UNIXes comes with standard gzip and bzip2 compressors. However, what open options there exist beyond these, especially ones utilizing ...
4
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1answer
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Decompressing these .gz files gives strange/unexpected results, can you get it working?

I have a collection of mailing list archive files all gzip'd, they're in a nested directory structure that starts with what appears to be a blank folder/jargon name. The files are here: http://lists....