08-13-2013
Python 3.x.x can easily handle binary and is fast at manipulating huge files.
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1. Shell Programming and Scripting
Hi all,
Does anybody know or guide me on how to remove the first N bytes and the last N bytes from a binary file? Is there any AWK or SED or any command that I can use to achieve this?
Your help is greatly appreciated!!
Best Regards,
Naveen. (1 Reply)
Discussion started by: naveendronavall
1 Replies
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Hello,
I have come across the necessity for me to deal with binary sequences and I had a few questions.
1- Does any UNIX scripting language provide any tool or command for converting text data to binary sequences? Example of binary sequence: "0x97 0x93 0x85 0x40 0xd5 0xd6 0xd7"
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Hi,
I have an one-line file consisting of a sequence of 660 letters. I would like to extract 9-letter blocks iteratively:
ASDFGHJKLQWERTYUIOPZXCVBNM
first block: ASDFGHJKL
1nd block: SDFGHJKLQ
What I have so far only gives me the first block, can anyone please explain why?
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Hi,
This is part of a large text file I need to separate out.
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The title is clear: why does ext3 allocate 8 blocks for files that are few bytes long?
If I create a file named "test", put a few chars in it, and then I run:
stat test
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Hello guys. I really hope someone will help me with this one..
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7. Shell Programming and Scripting
Hi,
I have a file with more than 28000 records and it looks like below..
>mm10_refflat_ABCD range=chr1:1234567-2345678
tgtgcacactacacatgactagtacatgactagac....so on
>mm10_refflat_BCD range=chr1:3234567-4545678...
tgtgcacactacacatgactagtatgtgcacactacacatgactagta
.
.
.
.
.
so on
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I have a fastq file from small RNA sequencing with sequence lengths between 15 - 30. I wanted to filter sequence lengths between 21-25 and write to another fastq file. how can i do that? (4 Replies)
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I have a text file, input.fasta contains some protein sequences. input.fasta is shown below.
>P02649
MKVLWAALLVTFLAGCQAKVEQAVETEPEPELRQQTEWQSGQRWELALGRFWDYLRWVQT
LSEQVQEELLSSQVTQELRALMDETMKELKAYKSELEEQLTPVAEETRARLSKELQAAQA
RLGADMEDVCGRLVQYRGEVQAMLGQSTEELRVRLASHLRKLRKRLLRDADDLQKRLAVY... (8 Replies)
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I sat down yesterday to write this script and have just realised that my methodology is broken........
In essense I have.....
----------------------------------------------------------------- (This line really is in the file)
Service ID: 12345 ... (7 Replies)
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LEARN ABOUT CENTOS
advdef
AdvanceCOMP Deflate Compression Utility(1) General Commands Manual AdvanceCOMP Deflate Compression Utility(1)
NAME
advdef - AdvanceCOMP Deflate Compression Utility
SYNOPSIS
advdef [-z, --recompress] [-0, --shrink-store]
[-1, --shrink-fast] [-2, --shrink-normal] [-3, --shrink-extra]
[-4, --shrink-insane] [-f, --force] [-q, --quiet]
[-h, --help] [-V, --version] FILES...
DESCRIPTION
The main purpose of this utility is to recompress the data present in the .png, .mng, .gz, .tgz and .svgz files.
The internal structure of the files isn't changed. Only the compressed data is modified.
OPTIONS
-z, --recompress FILES...
Recompress the specified files. If the -1, -2, -3, -4 options are specified it's used the smallest file choice from the previous
compressed data and the new compression. If the -0 option is specified the file is always rewritten without any compression.
-0, --shrink-store
Disable the compression. The file is only stored and not compressed. The file is always rewritten also if it's bigger.
-1, --shrink-fast
Set the compression level to "fast".
-2, --shrink-normal
Set the compression level to "normal". This is the default level of compression.
-3, --shrink-extra
Set the compression level to "extra".
-4, --shrink-insane
Set the compression level to "insane". It's VERY SLOW.
-f, --force
Force the use of the new file also if it's bigger.
LIMITATIONS
The advdef program cannot be used to recompress huge files because it needs to allocate memory for both the complete compressed and uncom-
pressed data.
COPYRIGHT
This file is Copyright (C) 2003, 2004 Andrea Mazzoleni
SEE ALSO
advpng(1), advmng(1), advzip(1), gzip(1), bzip2(1)
AdvanceCOMP Deflate Compression Utility(1)