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.

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can't compress whole file with tar?

I'm not an expert with tar (xz) but I have a video (FLV) and it's size 95MB I would like to compress it and I was using this command XZ_OPT=-9 tar -Jcvf myfile.tar.xz 1.flv (I got this from a ...
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2answers
104 views

How can I compress multiple pairs of files into separate archives by name?

I've got a couple dozen sets of Audacity project folders and .aup project files whose names are very close, i.e. 10-13-14-data and 10-13-14.aup. I'd like to compress all of these files automatically ...
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151 views

How do i backup my videos folder

Is there a way that I can compress my videos folder to a very small size that can fit in an 8 GB USB-drive? The folder is about 32 GB and has all our family videos in it. I tried backing up but the ...
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1k 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 ...
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1answer
39 views

ntfs-3g Failed to decompress file

For years the logs of my Ubuntu systems sharing drives with a Windows installation have been routinely flooding logs with: Mar 17 11:00:50 kemosabi ntfs-3g[483]: ntfs_attr_pread error reading ...
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1answer
45 views

Cannot open AR archive file!

I have compressed couple of files and folders (mostly photos) using 'Archive Manager' on Ubuntu 14.04. During compression I've selected file type as AR from the drop-down selector. Now when I'm ...
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1answer
82 views

How do I add convert wav into flac to the context menu?

I would like to right click on an wav-audio file in Nautilus or Dolphin and convert it to a FLAC-audio file that way with the highest possible loss less compression.
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1answer
69 views

Zcache Usage in Lubuntu

Recently I appended zcache to my grub configuration: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash zcache" But I am at a loss as to whether zcache is working or if I need to do something else. There is ...
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1answer
106 views

Mounted btrfs will [not] compress?

I have a partition formated to btrfs and im willing to store there stuff that I don't use that often but which I need fast access from time to time (some dumps of my PS2 games for now) because I have ...
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1answer
77 views

compressed block device

I wanted to experiment with combining bcache and a compressed block device on a hdd and seeing if this will speedup the boot time. Are there any means of compressing a block device at the block level? ...
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1answer
1k views

Make the daily log rotate run on exact time

I have Ubuntu 12.04.2 LTS server. My daily log rotations which are listed under /etc/logrotate.d/ are executed at the morning around 7:00 am, but it is not on exact time, each day it changed on range ...
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0answers
89 views

snzip via apt-get?

The snzip is a data compressor, based on the Google Snappy library. I've found and installed the library itself via apt-get: sudo apt-get install libsnappy-dev but it doesn't include the command ...
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0answers
645 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).
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36 views

How to uncompress vmlinuz

I have extracted a 14.04 iso file. How would I decompress vmlinuz and then compress it back?
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0answers
63 views

How to reduce file size in swf files?

I'm trying to reduce the file size in a swf file that is 17 MB in Ubuntu 14.10. I tried using swftools and avconv. When I did swfcombine -dz file.swf -o file_new.swf swftools only managed to ...
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0answers
17 views

Installing deprecated tool pack

I'd like to install the pack tool to solely employ Huffman coding to a file, for academic purposes. It is suggested to install liballegro4.2-dev, but I doubt it provides the same tool. Looking for ...
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0answers
111 views

CRC error when trying to open archive with gzip/tar

When I run the command tar xvf ns-allinone-2.28.tar.gz it gives the following error: ns-allinone-2.28/tclcl-1.16/tkAppInit.cc gzip: stdin: invalid compressed data--crc error tar: Child returned ...
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0answers
48 views

What can 7zip do that archive manager cannot?

7zip is very popular in the Ubuntu Software Centre. But Ubuntu comes with its own Archive Manager, which appears to support many formats, both compression and decompression. What can 7zip do that ...