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Full Discussion: Extract n number of lines from a file successively
Top Forums UNIX for Dummies Questions & Answers Extract n number of lines from a file successively Post 302503048 by drl on Wednesday 9th of March 2011 02:21:36 PM
Old 03-09-2011
Hi.

Adapt as needed:
Code:
#!/usr/bin/env bash

# @(#) s1	Demonstrate successive slices of file.

FILE=${1-data1}

n=$( wc -l < $FILE )
echo " Info: processing $n lines of $FILE"
for (( i=1,e=5,j=1 ; i<=$n ; i+=5,e+=5 ))
do
  echo " Pass $j"
  sed -n "$i,${e}p" $FILE 
  # Pipe into process here or write file and process.
  (( j++ ))
done

producing:
Code:
% ./s1
 Info: processing 16 lines of data1
 Pass 1
1
2
3
4
5
 Pass 2
6
7
8
9
10
 Pass 3
11
12
13
14
15
 Pass 4
16

Best wishes ... cheers, drl
This User Gave Thanks to drl For This Post:
Gussifinknottle
 

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APPLE_DUMP(1)                                                      Netatalk 2.2                                                      APPLE_DUMP(1)

NAME

       apple_dump - Dump AppleSingle/AppleDouble format file

SYNOPSIS

       apple_dump [-a] FILE | DIR
                                                          apple_dump -f FILE
                                                          apple_dump -d FILE
                                                          apple_dump -h | -help | --help
                                                          apple_dump -v | -version | --version

DESCRIPTION

       apple_dump dump AppleSingle/AppleDouble format file.

OPTIONS

       -a FILE|DIR
           This is default. Dump a AppleSingle/AppleDouble file for FILE or DIR automatically. Extrapolate FinderInfo type from absolute path. If
           FILE is not AppleSingle/AppleDouble format, look for .AppleDouble/FILE and ._FILE. If DIR, look for DIR/.AppleDouble/.Parent and ._DIR.

       -f FILE
           Dump FILE. Assume FinderInfo to be FileInfo.

       -d FILE
           Dump FILE. Assume FinderInfo to be DirInfo.

       -h, -help, --help
           Display the help and exit

       -v, -version, --version
           Show version and exit

NOTE

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       If setting option -f or -d, assume FinderInfo and doesn't look for another file.

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Netatalk 2.2                                                        02 Sep 2011                                                      APPLE_DUMP(1)
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