Shrinking (compressing) and restoring (decompressing) of data.

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3answers
52 views

Compress and remove original directory with limited storage

On my 3 TB external hard drive, I have a 2.7 TB directory containing relatively small files. I would like to compress this 2.7 TB directory and remove it to keep only the compressed version. The issue ...
6
votes
2answers
169 views

How do I layer compression on top of encryption on top of BtrFS, per-file?

BtrFS should support this really, but it doesn't. So ECryptFS looks like it will fill the gap. The only thing is, how would I layer compression on top of this? Reasons for compression on top of ...
1
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2answers
254 views

Debian: Create compressed Harddrive for copy

On my Debian system I have a box with certain configuration settings that I like but I've had to change them continuously. There have been times that I've gotten into a some-what irreversible ...
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2answers
340 views

How to zip folder content on Ubuntu without keep the folder structure(path)

How can I compress a directory content without compress the full path folder structure too. I am using this command to zip a folder content under var/www/ directory, but when I unzip the ...
4
votes
1answer
4k views

Clear unused space with zeros (btrfs)

How to clear unused space with zeros ? (I am asking for tool for btrfs filesystem) I'm looking for something smarter than cat /dev/zero > /mnt/X/big_zero ; sync; rm /mnt/X/big_zero Like ...
3
votes
1answer
3k views

Trying to compress avi file using ffmpeg

I used the command below to compress an avi file(using ubuntu) ffmpeg -i input.avi -vcodec msmpeg4v2 output.avi but I am getting these errors Incompatible sample format 's16' for codec 'ac3', ...
1
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1answer
66 views

linux unbuffered compression options

I'm working on a embedded system and due to persistent memory restrictions, I need to compress a log file "on the fly". My objective is to have a one liner inside a script, which would look like ...
1
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1answer
194 views

How to convert tar.bz2 to .bz2?

I have a file with compression tar.bz2 , I would like to convert it to .bz2 . Is there a command that does this in one shot? I tried the below but no joy ! tar -xvjf US.tar.bz2 US bzip2: ...
1
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1answer
275 views

Handle compress command error messages on AIX

I am working on production issue and unable to reproduce error message for compress command. Current Solution We have case-esac block in shell wrapper that handles messages as follows; case "$MSG" ...
1
vote
1answer
314 views

Compress memory on low Ram VM

Is there a way to get out more out of your limited Ram on a VM? I have a VM running on a cloud hoster and try to optimize a quite low on RAM mashine. I heard, there is a way to compress parts in the ...
0
votes
1answer
33 views

Verify files AFTER extracting gzip

I gzip a folder, transfer it to a remote location and then extract it to a folder. The problem is that this machine is a little unreliable and sometimes writes don't succeed and there can be zero-byte ...
2
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0answers
61 views

Image set compression

Is there a good open source (not exclusive to Linux) for compression of a set of similar images? I have thousands of documents scanned but I do not access them often. The documents are forms, with ...
1
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0answers
24 views

Where is my 7za data being written to

I have a weird question about 7za on Centos 7. I am adding a file to a 7za archive using the following command (the total size of the directory is around 40GB) /usr/bin/7za a -ppassword -t7z -mmt=off ...
1
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0answers
25 views

On-the-fly decompression

I have 44 TB worth of gzipped files that are 1.5 GB each when compressed or 2.0 GB when uncompressed. I have a tool that can read only uncompressed files. I would like to avoid the overhead of ...
1
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0answers
40 views

How do I create a deflate file suitable for HTTP?

Say I have index.html. How do I obtain index.html.deflate appropriate for serving through HTTP with the "deflate" encoding? I am coding a simple web server and I don't want to implement streaming ...
1
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0answers
26 views

Pipe gzip output to Bluetooth transfer?

How do I pipe gzip output to Bluetooth transfer? I am able to send send file over Bluetooth using this command: bluetooth-sendto --device=12:23:35:96:45:45 file.tar However, piping gzip didn't ...
1
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0answers
112 views

problem with /compress

I have script that was provided with some SW. The script output is something like that (in debug mode). + changeDirectory + '[' -d /cdr/work/proc_raw/proc ']' + cd /cdr/work/proc_raw/proc + echo ...
1
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0answers
48 views

Is it possible to get specific information about how a file is compressed?

File compression works on the basic idea of assigning commonly recurring chains of strings to a common index of a table where the full string is stored. For example: Input file: foo bar bash baz foo ...
0
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0answers
253 views

where to compress=lzo, btrfs with virtual disk images, with their vm's internally using btrfs

I've been using compress=lzo on my btrfs volumes, because I read this fast compression method actually increases drive performance. (Haven't tested myself.) I'm starting to use ...
0
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0answers
128 views

Errors when installing Maldet on an Fedora 20 system, have had these before

I just installed maldetect-1.4.2 on a system(Fedora 20) and it gives this error when installing: gzip: stdin: unexpected end of file tar: Child returned status 1 tar: Error is not ...