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UNIX for Dummies Questions & Answers
Re-arranging lines of text... help?
Post 302291545 by aerostar700 on Thursday 26th of February 2009 01:49:58 AM
02-26-2009
Well, basicaly you have 2 ways to do that. If it's just a matter of editing one file once in a while, I'd use vi for that. If you want to do that on a regular basis, a shell script would be better suited.
vi method :
vi pool.txt
(position cursor on the 1st line)
type : 5dd (the first 5 lines will disappear, don't panic)
type : Shift-G (cursor will jump to the last line)
type : p (5 lines will magically reappear at the end of text)
type : 5 and (Up Arrow) (cursor will jump up 5 lines)
type : 5dd (those 5 lines will vanish)
type : :0 (the colon sign and the number 0), that will position you at the top of the file
type : Shift-P (5 lines reappear on top of the file)
type : :w pool2.txt (colon sign and the letter w + name of the new file)
type : :q! (colon sign, the letter q and exclamation mark) to quit without saving the changes to the original file
This seems rather obnoxious, but in fact, it take just about 3 seconds to actually do that
Actually, nobody would want to write a script to do that, vi is quick enough. But if you really want to do it without using vi then :
$ tail -5 pool.txt > pool2.txt ; sed -n '6,15p' pool.txt >>pool2.txt ; head -5 pool.txt >>pool2.txt
... will do the trick nicely
vi method :
vi pool.txt
(position cursor on the 1st line)
type : 5dd (the first 5 lines will disappear, don't panic)
type : Shift-G (cursor will jump to the last line)
type : p (5 lines will magically reappear at the end of text)
type : 5 and (Up Arrow) (cursor will jump up 5 lines)
type : 5dd (those 5 lines will vanish)
type : :0 (the colon sign and the number 0), that will position you at the top of the file
type : Shift-P (5 lines reappear on top of the file)
type : :w pool2.txt (colon sign and the letter w + name of the new file)
type : :q! (colon sign, the letter q and exclamation mark) to quit without saving the changes to the original file
This seems rather obnoxious, but in fact, it take just about 3 seconds to actually do that
Actually, nobody would want to write a script to do that, vi is quick enough. But if you really want to do it without using vi then :
$ tail -5 pool.txt > pool2.txt ; sed -n '6,15p' pool.txt >>pool2.txt ; head -5 pool.txt >>pool2.txt
... will do the trick nicely
Last edited by aerostar700; 02-26-2009 at 02:58 AM..
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fmt
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)