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UNIX for Dummies Questions & Answers
compressed file
Post 302287284 by Ankgne on Friday 13th of February 2009 07:14:59 AM
02-13-2009
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10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
HI
I need to import data from a file which is in comressed format
but system doesn't have enough space to uncompress file
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I was wondering if there's a way to search within a file that's been compressed. i.e. if file a is inside file a.zip or a.gz, is there a a command that will retrieve the string of data I'm looking for in file a, and list which compressed file it found it in?
Please help!
Thanks. (8 Replies)
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How we can view the content of the file,if it compressed (or) Zipped ,without uncompress ?
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Discussion started by: bobprabhu
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I simply need to compress all files in a directory that are not already compressed and that are older than 10 days?
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Hi
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i have a file 4d7a94d0.bbb.1292
when i do
file 4d7a94d0.bbb.1292
the ouput is below
4d7a94d0.bbb.1292: gzip compressed data - deflate method
and i run this command
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Hi All,
Is there is any way to find the size of compressed file without doing decompression. The size should give the original uncompressed data size
Thanks
Arun (3 Replies)
Discussion started by: arunkumar_mca
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10. UNIX for Dummies Questions & Answers
Hi,
I have a big (~15G) compressed file having around 170M records and I need to exclude around 4k bad records (\n in the string) .
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LEARN ABOUT OSF1
expand_dump
expand_dump(8) System Manager's Manual expand_dump(8) NAME
expand_dump - Produces a non-compressed kernel crash dump file SYNOPSIS
/usr/sbin/expand_dump input-file output-file DESCRIPTION
By default, kernel crash dump files (vmzcore.#) are compressed during the crash dump. Compressed core files can be examined by the latest versions of debugging tools that have been recompiled to support compressed crash dump files. However, not all debugging tools may be upgraded on a given system, or you may want to examine a crash dump from a remote system using an older version of a tool. The expand_dump utility produces a file that can be read by tools that have not been upgraded to support compressed crash dump files. This non-compressed version can also be read by any upgraded tool. This utility can only be used with compressed crash dump files, and does not support any other form of compressed file. You cannot use other decompression tools such as compress, gzip, or zip on a compressed crash dump file. Note that the non-compressed file will require significantly more disk storage space as it is possible to achieve compression ratios of up to 60:1. Check the available disk space before running expand_dump and estimate the size of the non-compressed file as follows: Run tests by halting your system and forcing a crash as described in the Kernel Debugging manual. Use an upgraded debugger to determine the value of the variable dumpsize. Multiply this vale by the 8Kb page size to approximate the required disk space of the non-compressed crash-dump. Run expand_dump and pipe the output file to /dev/null, noting the size of the file that is printed when expand_dump completes its task. RETURN VALUES
Successful completion of the decompression. The user did not supply the correct number of command line arguments. The input file could not be read. The input file is not a compressed dump, or is corrupted. The output file could not be created or opened for writing and truncated. There was some problem writing to the output file (probably a full disk). The input file is not formated consistantly. It is probably corrupted. The input file could not be correctly decompressed. It is probably corrupted. EXAMPLES
expand_dump vmzcore.4 vmcore.4 SEE ALSO
Commands: dbx(1), kdbx(8), ladebug(1), savecore(8) Kernel Debugging System Administration expand_dump(8)