Questions tagged [compression]
Compression is the process in which a file or folder's size is reduced by using an algorithm to encode the same information using fewer bits.
249
questions
1150
votes
8
answers
3.5m
views
What command do I need to unzip/extract a .tar.gz file?
I received a huge .tar.gz file from a client that contains about 800 mb of image files (when uncompressed.) Our hosting company's ftp is seriously slow, so extracting all the files locally and sending ...
- 15.9k
981
votes
12
answers
2.0m
views
How do I uncompress a tarball that uses .xz?
I'm used to extracting tarballs with a -xfz flag, which handles gzip and bzip2 archives.
Recently I've run into a .tar.xz file and I would like to uncompress it in one step using tar, how can I do ...
- 71.8k
779
votes
25
answers
887k
views
How can I reduce the file size of a scanned PDF file?
I have a 72.9 MB PDF file that I need to shrink to 500 KB or below.
The file was a JPEG image that I had scanned and then converted to PDF.
- 7,929
239
votes
3
answers
595k
views
How do I compress a directory?
I'm trying to compress a directory and ftp it to a windows ftp.
I have tried every tar command I can find to compress a directory. It appears to be ok. Then I transfer it and view it's contents ...
- 2,583
204
votes
2
answers
256k
views
"Parsing filters unsupported" error during extraction of RAR file
I have received an .rar which I wish to unpack as it contains something rather important to me that I need to really have now. However even though I can view the contents of the .rar archive in the ...
user364819
198
votes
7
answers
188k
views
What's the difference between .tar.gz and .gz, or .tar.7z and .7z?
Recently, I've been backing up a lot of my data, and I noticed that I can save files as .gz or .tar.gz, or .7z and .tar.7z, etcetera. What are the differences between the normal one and the .tar.* ...
- 7,655
137
votes
7
answers
289k
views
What's the easiest way to unrar a file?
I just realized I can't unrar .rar files on my Ubuntu machine!
What's the easiest way to accomplish this fundamental task? If possible I'd love something like 7Zip that I can just right Click, and ...
- 8,017
128
votes
3
answers
530k
views
how to extract tar.7z files from command line? [duplicate]
Is there a way to extract files of tar.7z format using command line tools in Ubuntu?
- 1,425
100
votes
2
answers
187k
views
Compressing folders with password via command line
I would like to know whether it is possible to do the following via CLI.
I have a Folder F which contains several sub folders and some files. I want to compress folder F into .zip file with the "...
- 1,969
89
votes
9
answers
141k
views
How to reduce the size of a pdf file?
I'm looking for a way in Ubuntu to reduce the size of a pdf (by reducing the quality of the images).
I know that this can be done in Ghostscript by typing the following command in terminal:
gs -...
- 991
88
votes
7
answers
176k
views
Zip an archive without including parent directory
I want to zip many folders in a directory tree like so
V-
something.txt
folder
folder
g.jpg
h.jar
When I try to zip it, it ends creating a zip archive with the v folder instead of the contents ...
- 1,031
78
votes
2
answers
350k
views
Compress in .tgz
I want to compress files in .tgz. I know how to make tar.gz(with tar and gzip) and some people say it is almost the same, but I need to make a .tgz, how??
- 1,051
76
votes
9
answers
103k
views
Multi-Core Compression tools
What compression tools are available in Ubuntu that can benefit from a multi-core CPU.
- 212k
61
votes
3
answers
95k
views
Best compression method?
I want to compress a 16GB folder, but what's the best method? tar.gz? tar.bz2 rar? 7z? Would the archive be smaller if I first compressed in a method, then copy the compressed archive to a new folder, ...
- 1,017
36
votes
3
answers
166k
views
How to extract files from a split 7zip archive?
I downloaded a series of packages that all compress one thing. The files end in .0, .1, .2, etc.
The User Lists of these packages I downloaded say to use the file.bat to successfully extract, or to ...
- 361
36
votes
5
answers
46k
views
Will btrfs automatically compress existing files when compression is enabled?
I chose btrfs as the format of my / filesystem in the Ubuntu 12.04 LTS installer. After the installation completed, I added compress=lzo to the mount options in /etc/fstab and rebooted.
Will the ...
- 76.8k
35
votes
4
answers
34k
views
Should I use xz or lzma compression?
I was wondering since in Ubuntu 10.10 I have the ability to create both xz and lzma archives. Should I switch to xz?
http://en.wikipedia.org/wiki/Xz
http://en.wikipedia.org/wiki/Lzma
- 3,696
34
votes
5
answers
34k
views
Is there a way of leveling/compressing the sound system-wide?
As a Laptop user, I'm sure that a lot of people, even the ones using Netbooks would have already gone through this problem. Especially when listening to podcasts, and using it as an example, the sound ...
- 341
27
votes
1
answer
84k
views
zip multiple folders into a zip file using terminal [duplicate]
I wish to store a few folders in a zip file and then convert that zip file into a jar.
I have the following folders : META-INF and org.
I tried the following command:
zip META-INF/ org/ wordcount....
- 2,224
26
votes
1
answer
120k
views
Compressing a folder (tar) without its containing directory in the folder name
I am trying to compress a folder with the tar command.
When I am trying to compress it, it works fine. The problem is with the file name.
Source path:
/data/file/
Destination path:
/data/repo/...
- 275
26
votes
5
answers
21k
views
Compress and split files in the file explorer
If you right click a file in Nautilus and select Compress, then you get a dialog where you can choose a compression format and a filename. If you click on Advanced, then there are settings to split ...
- 29.5k
25
votes
5
answers
31k
views
How do I create tar.7z file from the command line?
I would like to zip up my homework from last year. How do I tar and zip the whole folder from command line Ubuntu (I don't have GUI).
- 253
23
votes
6
answers
103k
views
How do I use an .img.xz file or get an .img file from it?
I have a file with an xz extension, ubuntu-19.10-preinstalled-server-arm64+raspi3.img.xz. How do you get the .img out of it?
My goal is to flash the file on an SD card. I want to use www.etcher.io I ...
- 1,160
21
votes
3
answers
16k
views
How can I compress an mp3 file?
I used to download a program in windows that used lame to compress audio of mp3 files and made them smaller in size but I don't know how to do this in Ubuntu.
Does anybody know anything about this?
...
- 211
20
votes
4
answers
31k
views
Any linux command to perform parallel decompression of tar.bz2 file?
I have a rather large file (~50GB) and it takes some time to run
tar xvf file.tar.bz2
on it. I'm aware of programs that can do parallel compression for bzip2 files but unaware of programs that can ...
- 10.9k
20
votes
1
answer
60k
views
7z "ultra" settings for zip format
7z "ultra" settings for .7z format are:
7z a -t7z -m0=lzma -mx=9 -mfb=64 -md=32m -ms=on
What are the "ultra" settings for .zip format (using 7z)?
- 524
19
votes
5
answers
30k
views
Command line archive manager / extracter
I keep forgetting all the corresponding extract commands for every compression format.
So I was thinking about writing a script that merely maps file extensions to the appropriate extract command. ...
- 1,438
18
votes
4
answers
51k
views
How to install rar (no installation candidate)?
I need the package rar. But I get this error whenever I try to install it:
Reading package Lists... Done
Building dependency tree
Reading state information... Done
Package rar ist not available, but ...
- 181
17
votes
2
answers
12k
views
How to set 7z compression level using GUI in Ubuntu?
Archive Manager, or file-roller, doesn't seem to have the option to set the compression level for 7z files.
However, the windows client 7-zip has an option to do so using GUI -
On Ubuntu/Linux, one ...
- 8,289
15
votes
6
answers
12k
views
What is the difference between different "compression" systems?
I've always used TAR and ZIP for compression, but recently I have heard about the *.Z compression algorithm. This brought up a question for me:
With all of these compression systems, which one is ...
- 34.1k
13
votes
2
answers
4k
views
Can I see the option tar.gz in the GUI ubuntu 18.04
I am trying to zip in .tar.gz in the GUI, but only these options appear in the window: .zip, tar.xz y .7z
Could the tar.gz be in the window?
- 243
13
votes
1
answer
28k
views
Extract a rar file with a password that contains special characters [closed]
How can I extract a rar file with a password that contains special characters like ', ", `, /, \, ^, (space), !, ?, {, }, [, ], $, &, %, *, ~, :, ,, <, >, etc.
Here is an example of PASSWORD ...
- 524
12
votes
3
answers
27k
views
How do I compress multiple files into a .xz archive?
I want to compress several images into a .xz archive. How do I do that?
- 199
12
votes
6
answers
60k
views
How can I maximum compress video files?
I received 4 .mov files from a client that they want on their mobile website via SlideShowPro. Each original file was between 200 and 400 mb. I've gotten each one down to about 30 mb using ...
- 15.9k
12
votes
4
answers
13k
views
How to list compression ratio on compression enabled btrfs?
I enabled compression on a btrfs volume. Now how do I know the compression ratio of files or directories? Or at least the overall stats?
- 369
11
votes
10
answers
15k
views
Trick installer to use btrfs root with compression
I want to install Maverick onto a BTRFS root partition. Not for fun or testing, but because I need compression due to a small flash disk (4GB).
Now the 10.10 installer finally supports btrfs, but ...
- 3,460
11
votes
2
answers
18k
views
btrfs and missing free space
I converted my ext4 partition to btrfs and deleted the save subvolume after doing so. Then I enabled the compression (lzo) of the filessystem in the fstab file and everything is correct so far.
Then ...
- 211
11
votes
4
answers
18k
views
Tool for high picture compression with low loss of quality
Is there a tool which can achieve high picture compression while preserving (as much as possible) the image quality and can compress images in batches, in order to make optimal images for websites?
- 5,033
11
votes
1
answer
3k
views
How to make Files use file-roller again? [duplicate]
How can I get more options (in addition to zip, tar.xz and 7z) and the option to add password when making archive files in file-roller in Gnome 3.22? Thanks!
Screen-shot of new create archive in ...
- 2,081
10
votes
4
answers
5k
views
How can I store files in an archive without compressing them?
I need to store files in archives, but not compress them.
The archive manager takes too long, and I can't find an option to only store (not compress) files.
Any suggestions?
- 176
10
votes
3
answers
36k
views
Missing GUI application for 7-Zip?
I installed 7-Zip from Software Center, but where is the GUI application?
Original question asked by a user:
ich habe 7Zip aus dem Softwarecentrum installiert, finde aber kein
Symbol zum öffnen ...
- 28.8k
10
votes
2
answers
53k
views
How to extract files from a split 7zip archive ended by .001 and .002?
I have two files data.7z.001 and data.7z.002.
l tried to extract them using :
7z e asdf data.7z.001
l got this error
7-Zip [64] 9.20 Copyright (c) 1999-2010 Igor Pavlov 2010-11-18
p7zip ...
- 101
9
votes
1
answer
15k
views
Simple Scan - Changing the default output File Type to PDF and improving Compression?
Is there a way to change the default output file type in the 'Simple Scan' software provided with Ubuntu 12.10 to be a PDF rather than a JPEG? And is it possible to modify the compression settings on ...
- 391
8
votes
1
answer
17k
views
Unzip subdirectory contents of zip file to /tmp?
As part of a scripted software installation on Xenial Xerus I have a zipped archive called 'test.zip' that contains, among other files, some files in a sub-directory called samples:
andrew@athens:~/...
- 38.1k
8
votes
1
answer
30k
views
Xfce - GUI for File Compression?
If I remember correctly, using Nautilus in Gnome, I could simply right-click on a file & select "compress".
Now I am using Thunar in Xfce & I can't find how to simply compress files...
I ...
- 113
8
votes
2
answers
4k
views
How to archive with ignoring files larger than 100MB
I'm trying to archive files with tar and ignoring files larger than 100MB. Is that possible?
PS: Not have to use tar.
- 1,280
8
votes
1
answer
4k
views
Create RAR archive in 17.10
I used to be able to create a rar archive from a file or folder by just right-clicking on the file (in Nautilus) and choosing "Compress...". I had the option to choose the rar format, which I like ...
- 393
8
votes
1
answer
2k
views
How to make nautilus use file-roller in 17.10 like in 17.04?
In Ubuntu 17.10 ubuntu upgraded Nautilus (File Browser) to version 3.26.0. New nautilus is not using file-roller anymore, it has switched to an integrated compression mechanism.
This makes it ...
- 1,723