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.
0
votes
0answers
19 views
ramdisk, dedup,compressed,
I'm looking to create a ramdisk of 32GB at boot time that can do compression and deduplication in real time. This area will contain a fair amount of data of which 25-50% maybe duplicated, hence the ...
0
votes
3answers
21 views
Which archive format does not read/extract whole archive when extracting single file?
As the title states, I have a few large archives (currently in .7z and .tar.gz format) stored on a remote location which I access via sshfs. I often find myself needing to extract one or two files ...
1
vote
1answer
21 views
Unrar fails when accents are present in filenames
I have the rar package installed. Double clicking on .rar files opens the file in Archive manager. It works fine when folders or files use only characters with no accentuation, but if there is some ...
2
votes
2answers
49 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).
2
votes
1answer
30 views
how do I get maximal compressed screenshots?
I'd like to compress my screenshots as much as possible before I send them via email. The best compression ratio I only got with some work on each screenshot:
first I took the screenshot with ...
1
vote
1answer
35 views
Extract an .mzp on Ubuntu
As above, is there any way to perform an extraction of a .mzp file on Ubuntu?
The interwebs have nothing for me :p.
1
vote
0answers
82 views
Unrar works really slow compared to Winrar?
Is there a particular reason why Unrar operations are so slow comparing to Winrar on Windows. I managed to extract a file faster in Virtualbox (Windows 7 guest with Winrar).
1
vote
1answer
242 views
Gzip and rename (remove .gz extension) all files except images and PDFs?
I am able to gzip every file in a directory (mydirectory) using the command:
gzip --suffix .gz --recursive mydirectory
But...
I don't want the images (.ico, .jpg, .png, .gif) and PDFs (.pdf) ...
0
votes
4answers
149 views
Why are the .zip files of compressed .jpegs about the same size?
I am a new user of Linux OS's and I am trying Ubuntu 12.10 right in this days.
The overall impression is quite positive, but there are some features that make it still complicated for use from most ...
3
votes
2answers
199 views
Should I install zip or use gzip?
I have downloaded some .zip files. I wish to decompress them (I have unzip), modify them, and compress them again (into separate compressed files, one decompressed file per compressed file). I have no ...
3
votes
2answers
290 views
Multi-Core Compression tools
What compression tools are available in Ubuntu that can benefit from a multi-core CPU.
2
votes
1answer
449 views
How to read/mount a .gz.dd image file?
I have a partition file (a .gz.dd file) that I need to read the files from. I'm new to Linux and I don't know how I can read/mount .dd files in Ubuntu. Would you guys tell me the procedure of reading ...
1
vote
1answer
287 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 ...
4
votes
2answers
939 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 ...
3
votes
1answer
508 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, ...
0
votes
2answers
87 views
Best Archiving Method for server backup [closed]
I am going to back up my server data in archives. I came across many methods like creating .tar, .tar.gz, tar.bz, tar.bz2. I want to compress my data as best as possible while retaining the best ...
0
votes
1answer
110 views
Reduce PDF file by factor of two [duplicate]
Possible Duplicate:
Reduce filesize of a scanned PDF
How to reduce pdf filesize?
I have completed my thesis. I used LaTeX to write and the total output size of my PDF is ~100MB. It ...
1
vote
2answers
847 views
Reducing a scanned pdf file size [duplicate]
I need to compress a scanned PDF file from 1.5 MB to under 600 KB. I've tried a number of Ghostscript solutions given on other threads but they seem to compress it all the way down to just 2.2 KB and ...
0
votes
1answer
176 views
How can I set up on-the-fly/transparent compression?
I have huge data sets to deal with, and so my 1TB drive is filling up quickly. However, the data is highly compressible when using LZMA (7zip, bzip2). The only file system with transparent compression ...
11
votes
2answers
670 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 ...
5
votes
2answers
146 views
How to decompress and access a 10 year old ACE file?
I'm trying to unarchive some old photos I have that are stored in ACE format (via WinACE). The file was created a little over 10 years ago.
I'm running unace l photos.ace and getting what seems to be ...
0
votes
1answer
283 views
How can I (install and) use the cloop device in Ubuntu?
I need to be able to mount and read on the fly a compressed dd image. I think that cloop is what I need. But I don't see it in /lib/modules and, anyway, I'd like to know how it works first.
Anybody ...
0
votes
0answers
161 views
How to compress (archive) partition (or disk) and then mount it directly
How to mount compressed disk image?
Here is my situation: I have hard drive with (fresh) OS installation. I made compressed image of that disk to another disk.
How to make compressed disk image to ...
3
votes
2answers
291 views
Which Compression Format will give the least size
Hi i have a few GBs of files which i am supposed to burn to a DVD for permanent storage, which compression format will give me "LEAST" size, thanks
1
vote
1answer
486 views
Is it possible to run `Extract here` or `Compress`/`Create archive`with other archivers than the three listed (in PCManFM)?
I have installed 7pzip and peazip to handle archives but after setting one of them as default and using Extract here or Compress/Create archive I am prompted as below
Selecting one in the list ...
9
votes
4answers
537 views
How can I compress an mp3 file?
Well that is my question! i used to download a program in windows that used lame to compress audio of mp3 files and made them shorter in size but I don't know how to do this in ubuntu!
Does anybody ...
0
votes
1answer
202 views
compressing a list of files by using tar
what I am trying to do is to compress a list of files using tar.
So what I am doing is
sudo tar -pcf filename.tgz `cat filename.list`
so if there is a directory on the list like this
...
0
votes
1answer
64 views
Sudden black screen while extracting rar (12.04)
I was in the middle of extracting a rar file when my screen blacked out (it looked like my screen when the power is off). I forced restart by pressing long on the power button of my laptop but it ...
2
votes
1answer
636 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 ...
0
votes
2answers
747 views
Why compressed directories cannot be extracted in /opt?
I am not able to uncompress a file with .tar.gz extension
Did
sudo tar -xvzf ~/Downloads/file.tar.gz /opt/ but no success.
it says:
tar: /opt: Not found in archive
tar: Exiting with failure status ...
3
votes
1answer
156 views
How do I set ubuntu to compress a series of folders , deleting the original after its been compressed?
I need to setup some kind of script to go through a set of folders, compressing each one, and only leaving the compressed copy of each. How can I do that?
0
votes
1answer
122 views
Navigate Thru Pictures in a Compressed File without extracting
Is there a way to view pictures that are inside a compressed file (suppose .rar) withour having to extract all them? Example: when i open a certain rar file that contains pictures, if i double click ...
1
vote
3answers
1k views
GUI based options: Advanced Archiving “Zip 7z etc…”
Does a graphical archive manager exist for linux that has the advanced settings that 7z and others have on windows?
Something with settings like "Use here as temp" "thread count to use" "Memory to ...
4
votes
4answers
715 views
How can I store files in an archive without compressing them on Ubuntu 10.04?
I need to store files in archives, but not compress them.
The archive manager that comes with Ubuntu 10.04 takes too long, and doesn't have the option to only store (not compress) files.
Any ...
3
votes
1answer
3k 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 ...
2
votes
1answer
627 views
How do I open/extract .xdi file on (x)ubuntu?
Downloaded a bunch of books which were compressed in a .xdi file. How do I open/extract the internal data/files? I go to open, and Ubuntu does not recognize/nor is there a seemingly effective ...
2
votes
1answer
337 views
ramdisk, compressed, writeable, no swap
I need a ramdisk who handle transparent realtime compression on write and decompression on read.
Example : I use /dev/shm, or I create a new tmpfs, mount it writeable and compressed.
I wrote and ...
8
votes
4answers
4k 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 ...
49
votes
6answers
11k 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.* ...
0
votes
1answer
181 views
Using tar, the entire folder structure is including, I don't want that
I am taring a folder and for some reason the entire directory structure that preceds the folder I am tarring is included.
I am doing this in a script like:
'tar czf ' + dir + '/asdf.tgz ' + dir + ...
1
vote
1answer
171 views
Estimating compressed file size using a list parameter
I am currently compressing a list of files from a directory in the following format:
tar -cvjf test_1.tar.gz -T test_1.lst --no-recursion
The above command will compress only those files ...
12
votes
4answers
22k views
How to reduce pdf filesize?
I have a 72.9MB pdf file that I need to shrink into under 500KB.
The file was a jpeg image that I had scanned, and then converted to pdf.
Can someone please offer any suggestions?
5
votes
1answer
207 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
vote
1answer
377 views
archive manager does not archive files
The archive manager does not archive files or games and gives the following error:
Archive: /media/BA/setup.exe
[/media/BA/setup.exe]
End-of-central-directory signature not found. Either this file ...
2
votes
1answer
726 views
How do I compile mod_deflate?
I want to enable compression in apache. For the same I am trying to use deflate module of apache.
I have already installed apache 2. But it is a default installation and in that mod_deflate is not ...
0
votes
1answer
180 views
Wine Problems // Black Meshes and bad performance
I´ve installed the latest Ubuntu version as DualBoot with Windows XP and wanted
to play a game with Wine. So I started the Software Center, installed it and
followed the installation guide at the Wine ...
23
votes
3answers
27k 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 ...
4
votes
3answers
546 views
What's the difference between a compressed folder (with files) and a compressed Tar archive?
I don't understand the use of TAR. My understanding is it pulls together many files into one file. But doesn't putting files in a folder do this?
Using ZIP, I put files I want to archive in a folder ...
1
vote
2answers
6k 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??
4
votes
2answers
550 views
Is it safe to remount btrfs with compression?
I've finally found how to enable compression in btrfs, and would like to do so. However, as my main drive, I'm not really wanting to risk a change that could corrupt the hard drive.
Everything I've ...
