12-02-2008
Delete lines inside a file.
hi....
I have a file having more then thousand lines.
i want to remove selected lines in it.
And also if there exists two duplicate lines, I want to delete one of them.
Please help me with awk and shell.
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I have file of more than 10000 lines.
I want to delete 40 lines after every 20 lines.
e.g from a huge file, i want to delete line no from 34 - 74, then 94 - 134 etc and so on.
Please let me know how i can do it.
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LEARN ABOUT OPENSOLARIS
insdelln
insdelln(3XCURSES) X/Open Curses Library Functions insdelln(3XCURSES)
NAME
insdelln, winsdelln - insert/delete lines to/from the window
SYNOPSIS
cc [ flag... ] file... -I /usr/xpg4/include -L /usr/xpg4/lib
-R /usr/xpg4/lib -lcurses [ library... ]
c89 [ flag... ] file... -lcurses [ library... ]
#include <curses.h>
int insdelln(int n);
int winsdelln(WINDOW *win, int n);
PARAMETERS
n Is the number of lines to insert or delete (positive n inserts; negative n deletes).
win Is a pointer to the window in which to insert or delete a line.
DESCRIPTION
The insdelln() and winsdelln() functions insert or delete blank lines in stdscr or win, respectively. When n is positive, n lines are
added before the current line and the bottom n lines are lost; when n is negative, n lines are deleted starting with the current line,
the remaining lines are moved up, and the bottom n lines are cleared. The position of the cursor does not change.
RETURN VALUES
On success, these functions return OK. Otherwise, they return ERR.
ERRORS
None.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
|MT-Level |Unsafe |
+-----------------------------+-----------------------------+
SEE ALSO
deleteln(3XCURSES), insertln(3XCURSES), libcurses(3XCURSES), attributes(5), standards(5)
SunOS 5.11 5 Jun 2002 insdelln(3XCURSES)