`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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5answers
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What is the maximum compression ratio of gzip?

What is the largest size a gzip (say 10kb for the sake of an example) can be decompressed to?
3
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1answer
29 views

Linux pv | gzip doesn't delete original file

I'm pretty new to unix so go easy. Normally gzip file replaces file with file.gz (which i'm guessing is: create file.gz then rm file). I have some rather large files I'm compressing and I like to ...
4
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2answers
109 views

Archive (.tar.gz) Corruption

I've got a .tar.gz archive that has definitely suffered some kind of corruption. The data inside the archive is obviously very precious to me and I'd really like to get my hands on as much as ...
3
votes
3answers
451 views

Compressing compressed .tar.gz files deterministically

I want to perform a series of recompressions of compressed files to study their properties. At first, I tried simply recompressing .zip files in a loop: for f in $(seq 1 100) do zip $f.zip -9 -v ...
1
vote
0answers
9 views

Simultaneously enable gzip and $STR_REPLACE in CGI in apache

I have a code in my CGI script for text replacement (for example replace 'red' with 'blue') $STR_SEARCH='red' $STR_REPLACE='blue' I am using the below code in .htaccess for enable replace function: ...
13
votes
6answers
10k views

SVN directly to tar

Is there a way to directly tar the latest version of an SVN folder without the SVN hidden files? I would like to create a tar archive without the SVN files. I know you can get the latest with the SVN ...
9
votes
1answer
15k views

When using “gzip --decompress”, the result is “gzip: MYFILE.zip: unknown suffix — ignored” on Windows

In Windows PowerShell (if it matters), I would like to decompress a zip file with gzip with the argument --decompress, but unfortunately it doesn't work. Please look at the screenshot below. gzip ...
0
votes
1answer
1k views

With which command should I open .raw.gz files?

I have a bunch of .raw.gz files which are data files streamed from twitter with JSON interface. I am wondering which command should I use on my Mac OSX to open (unzip) these files? I have tried tar, ...
0
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1answer
234 views

Winzip error / timestamp in file name related?

I receive an error when attempting to use winzip to extract a .zip file. The filename contains a colon character (used in the timestamp). Is this something that winzip does not handle? Also, the ...
14
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2answers
7k views

Equivalent to tar's “--strip-components=1” in unzip?

I have a script that extracts a tar.gz-file to a speificed subdirectory mysubfolder: mkdir mysubfolder; tar --extract --file=sourcefile.tar.gz --strip-components=1 --directory=mysubfolder; Is there ...
21
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9answers
323k views

How to extract a tar file (.tgz) in windows?

How to extract a tar file (.tgz) in windows? Is this possible, or do I have to get into a linux environment and extract it?
0
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2answers
91 views

Can a tar.gz file contain malicious code? Is a Mac vulnerable to such a tar.gz?

Can a tar.gz file contain malicious code that is similar to ZIP file? On a Mac particularly? Edit: Oops, I meant to ask the process of opening/untar a tar file on the Mac. Not the contents of the ...
2
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6answers
3k views

Any method to batch-compress multiple files?

Does anyone know how multiple files can be GZIP compressed? I have lots of files in a folder and I need to compress them individually. Actually, I've found a way to do it. GZIP command line binary ...
49
votes
1answer
85k views

How do I unzip a tar gz archive to a specific destination?

I want to unpack a .tar.gz file to a specific directory. The archive file is in /root/Documents. I want to unzip it into /root/Desktop/folder. The folder structure in zipped file should be preserved ...
24
votes
2answers
26k views

How to list the contents of a zip along w/ file sizes and compression ratio via cmd line

How do I list the contents of a zip along w/ file sizes and compression ratio (or packed size) on osx w/ command line tools?
0
votes
1answer
656 views

Compressing bigger than 1GB files seems not to work

I tried my best to compress some videos, about 1.4GB each. I tried to compress them separately, "tarring" (using tar) them and then compress, everything. I'm on OS X Lion and I did try the ...
0
votes
0answers
16 views

gzip archive with damaged begin

How to recover as much as possible gzip file content when begin of this file is damaged? Is it possible? I tried commands gunzip -c , zcat, openssl zlib -d etc. Unfortunately that commands doesn't ...
8
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6answers
6k views

Which archiving method is better for compressing text files on Linux?

In my application I need do compress of logs that are text files. Seems that bzip2 and gzip have the same compression ratio. Is that correct?
2
votes
1answer
34 views

Change the directory structure in tar.gz without extracting it

I have a tar.gz file that has the following structure when I extract. /dir1/dir2/dir3/many_text_files(.txt) I would like to change the structure as dir3/many_text_files(.txt) A simple solution is to ...
12
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4answers
4k views

Is there a way to mount a file.tar.bz2 without extracting it onto the filesystem?

Is there a way to mount a file.tar.bz2 without extracting it onto the filesystem? I don't care if the mount is read only. Hopefully your answer will also apply to file.tar.gz. "mount" in this ...
0
votes
2answers
43 views

How to zip an entire folder via gzip?

I am trying to zip an entire folder. There's this -r command to zip a folder recursively. Now this is good to zip all the files in a folder, but my predicament is I want to zip the folder in it's ...
0
votes
1answer
14 views

Ignore Zeros Not Working When Trying To Open Tar

I have a backup file from my system admins called backup.tar.gz. They mentioned that I need to use the --ignore-zeros/-i command when unzipping the file. However when I run the command as suggested ...
2
votes
1answer
95 views

Using dd to backup disk to same disk

I've tried using dd to back up my computer's hard drive, but I met with some rather confusing results. I've seen on multiple sources (e.g.: ...
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0answers
22 views

GZIP file system code for Linux?

GZIP allows one to use file system codes. See page 7 of RFC 1952. What is (are?) the GZIP file system code(s) to use for Linux?
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vote
3answers
19k views

tar Cannot open: No such file or directory

Fresh install of CentOS 5.4 Downloaded the following: http://prdownloads.sourceforge.net/webadmin/webmin-1.510.tar.gz MD5 sum is correct (cdcc09d71d85d81914a90413eaf21d3f). The file is located ...
2
votes
1answer
37 views

How to Tar/GZip just the files folders in the data directory?

I have a bunch of folders and files in /usr/local/bin/data that I want to tar.gz. I have a bash script that sets the source folder to backup src='/usr/local/bin/data/* When I open up the .tar.gz ...
6
votes
3answers
5k views

How can I get the uncompressed size of gzip file without actually decompressing it?

Please find my OS details: $ uname -a AIX xxyy 1 6 000145364C00 I've tried the following command to get size of a file in gzip archive: $ gzip -l mycontent.DAT.Gz compressed uncompr. ratio ...
27
votes
4answers
88k views

How to gzip multiple files into one gz file?

I have 100 files: cvd1.txt cvd2.txt ... cvd100.txt How to gzip 100 files into one .gz file so that after I gunzip it, I should have cvd1.txt, cvd2.txt ... cvd100.txt separately? Thanks for your ...
0
votes
1answer
29 views

using compressed (.gz) files with command line scripts expecting uncompressed files

In order to save disk space, I've gunzip-ed a lot of my files that I regularly use. What is a best-practice way to still use the .gz version of these text files with, say, python scripts? More ...
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0answers
29 views

Unzipping files downloaded from the Arxiv server

I want to download the source Tex files (not the pdf) of this document: http://arxiv.org/abs/1306.0322 After downloading here, I get a weird file with the ".0322v3" (the second part of the doc code) ...
5
votes
2answers
915 views

What is the correct MIME type for a tar.gz file?

What is the correct MIME type for a tar.gz file? I've searched around and found several values being used, including: application/x-gzip application/x-gtar application/x-tgz But I could find no ...
3
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1answer
54 views

Ctrl-C'd an in-place recursive gzip - is this likely to have broken anything?

So, today i was trying to zip up a large folder (that has a large nested set of subfolders), in linux. I did: gzip -r bigfolder bigfolder.gz and after it had been going for a couple of minutes I ...
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0answers
42 views

view zip file content in tree command style

I am seeing the zip file content using unzip -l files.zip | less but it outputs in ls style , is it possible to to display output in tree command style
2
votes
2answers
604 views

Chromium: prevent unpacking tar.gz

The latest Chrome and Chromium seems to unpack .tar.gz files automatically for me on OS X and Linux. When using wget with the same URL, it shows: $ wget http://mydomain/dir/file.tar.gz ... HTTP ...
0
votes
0answers
92 views

Composer Install .tar.gz

Trying to install node.js via composer (for automation). "repositories": [ "type": "package", "package": { "name": "nodejs/nodejs", "version": "0.12.6", "dist": { ...
0
votes
4answers
135 views

How to open tar gz file created using tar piped to gzip

I wanted to generate a tar gz file with the highest compression level, and I followed the solution from http://superuser.com/a/546509/461740: tar cv /path/to/directory | gzip -9 > file.tar.gz ...
1
vote
1answer
153 views

How do I use HTTrack to download gzipped files from URLs with accented characters?

I am downloading a site with HTTrack with spotty results. Several directories return 2 or more versions of the same HTML file. These duplicates in any given directory may include: a file named ...
0
votes
1answer
49 views

Unix gzip more than one file at once

I have come to the end of my research with unix:> I'm new with unix and its enviroment, so i need your help guys. Long story short, i have a housekeeping script, which runs daily/weekly (it doesnt ...
0
votes
1answer
177 views

Gzip compression on Apache using .htaccess

As per http://gtmetrix.com/enable-gzip-compression.html i'm trying to enable gzip compression on apache webserver adding code mentioned below in .htaccess, but it's not working ; can you please ...
0
votes
1answer
54 views

Incorrect size of image file made with dd and gzip?

In the past I made a backup of a partially full partition with dd if=/dev/sda1 | gzip -5 > file.gz. Some time later, when a free space on partition was smaller I made an image file again with the ...
0
votes
1answer
784 views

Caveats with gzip --rsyncable - no speedup

I am using (trying) gzip to compress an SQL file in an rsyncable way in order to transfer the backup with minimal delay. However it appears that this is not working, since the speedup is always 1.00. ...
3
votes
1answer
198 views

Can't extract tar.gz file from Apache

I'm trying to do install manifoldcf on Ubuntu. I downloaded the file - apache-manifoldcf-1.9-src.tar.gz - directly from Apache (and I've tried different version as well with the same results). Using ...
0
votes
2answers
160 views

Decompress logged GZIP binary data

In an effort to verify my app was sending back and forth with my server correctly, I had run tcpdump -w ~/capture.txt -s 0 port 80 on a server with proxy sitting in between to capture all ...
2
votes
3answers
4k views

gzip change file ownership

Here is a case I don’t understand. I have a group bar, and this group has two users; foo and bar. I have a test.txt file, foo is the owner and bar user only can read it. However, if bar user run ...
28
votes
6answers
63k views

Command to 'gzip' a folder?

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 ...
0
votes
0answers
55 views

Need to create .tgz file in Windows

I need to create a .tgz file - NOT a tar.gz, a .tgz specifically - in Windows. I've tried 7zip, Peazip, and ProgramArchiver, but they all create .tar.gz files. I've also tried running 7z from the ...
0
votes
1answer
149 views

Cannot unzip xymon-4.3.18.tar.gz; “No such file or directory” error

I have a problem unzipping an archive. ubuntu:~% sudo gzip -dc xymon-4.3.18.tar.gz | tar xf - gzip: xymon-4.3.18.tar.gz: No such file or directory tar: This does not look like a tar archive tar: ...
0
votes
1answer
314 views

dd , pv , gzip and exclude directory, possible?

Is it possible to do the following: dd if=/dev/hdx | pv | gzip > /path/to/image.img\ --exclude=/temp --exclude=/lost+found --exclude=/proc --exclude=/path/to/image.img So I want to make a backup ...
3
votes
2answers
98 views

How to tell of a GZip file is still being written while being copied

I am getting a gzip file in a path. Input Folder Path: <server>/input_gate I want to check whether the GZIP file I am getting in this folder are valid? I have used the following command. It ...
37
votes
3answers
27k views

How to know if a site is gzipped?

I am accessing some web sites which are really really slow, and I would like to know if those sites are gzipped. Is there an easy way to find this out?