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Top Forums Shell Programming and Scripting Output block of lines in a file based on grep result Post 302775427 by mnassiri on Monday 4th of March 2013 09:16:48 PM
Old 03-04-2013
Output block of lines in a file based on grep result

Hi I would appreciate your help with this.
I have a output file from a command. It is broken based on initial of the users. Exmaple of iitials MN & SS. Under each section there is information pertaining to the user however each section can have different number of lines. MY challenge is to
Grep for a particular initials ( Example MN ) and print all the lines under this initial
and put them in to a new file. The problem is that uder each initial there could be any number of lines. So the number of lines per initial is not fixed. How can I do this? I put sample of input and output files.


Input File name >> myfile.txt
Content of the file

MN
11
22
33

SS
11
22
33
44

MN
44
55

SS
55
66
77
OUTPUT File >> Should look like this

MN
11
22
33

MN
44
55
 

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fmt(1)							      General Commands Manual							    fmt(1)

NAME
fmt - format text SYNOPSIS
width] [file...] DESCRIPTION
The command is a simple text formatter that fills and joins lines to produce output lines of (up to) the number of characters specified in the width option. The default width is 72. concatenates the arguments. If none are given, formats text from the standard input. Blank lines are preserved in the output, as is the spacing between words. does not fill lines beginning with a period for compatibility with Nor does it fill lines starting with Indentation is preserved in the output and input lines with differing indentation are not joined (unless is used). can also be used as an in-line text filter for the command: reformats the text between the cursor location and the end of the paragraph. Options recognizes the following options: Crown margin mode. Preserve the indentation of the first two lines within a paragraph and align the left margin of each subsequent line with that of the second line. This is useful for tagged paragraphs. Split lines only. Do not join short lines to form longer ones. This prevents sample lines of code, and other such "formatted" text, from being unduly combined. Fill output lines to up to width columns. WARNINGS
The width option is acceptable for BSD compatibility, but it may go away in future releases. SEE ALSO
nroff(1), vi(1). fmt(1)
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