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Top Forums Shell Programming and Scripting Delete lines based on line number Post 302491712 by radoulov on Friday 28th of January 2011 05:39:24 AM
Old 01-28-2011
You can do something like this:

1. Prepare a file with the numbers of the records to be deleted, one per line:

lines_to_delete

Code:
510
12
219
3999

2. Run the following script:

Code:
awk 'NR == FNR {
  ltd[$1]; next
  }
FNR in ltd { next }
1' lines_to_delete infile

infile is your data file.
 

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curs_scroll(3CURSES)					     Curses Library Functions					      curs_scroll(3CURSES)

NAME
curs_scroll, scroll, scrl, wscrl - scroll a curses window SYNOPSIS
cc [ flag ... ] file ... -lcurses [ library ... ] #include <curses.h> int scroll(WINDOW *win); int scrl(int n); int wscrl(WINDOW *win, int n); DESCRIPTION
With the scroll() routine, the window is scrolled up one line. This involves moving the lines in the window data structure. As an optimiza- tion, if the scrolling region of the window is the entire screen, the physical screen is scrolled at the same time. With the scrl() and wscrl() routines, for positive n scroll the window up n lines (line i+n becomes i); otherwise scroll the window down n lines. This involves moving the lines in the window character image structure. The current cursor position is not changed. For these functions to work, scrolling must be enabled via scrollok(). RETURN VALUES
All routines return the integer ERR upon failure and an integer value other than ERR upon successful completion. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |MT-Level |Unsafe | +-----------------------------+-----------------------------+ SEE ALSO
curs_outopts(3CURSES), curses(3CURSES), attributes(5) NOTES
The header <curses.h> automatically includes the headers <stdio.h> and <unctrl.h>. Note that scrl() and scroll() may be macros. SunOS 5.11 31 Dec 1996 curs_scroll(3CURSES)
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