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Top Forums UNIX for Dummies Questions & Answers Delete 26 consecutive lines in a file Post 302811649 by Don Cragun on Thursday 23rd of May 2013 11:15:29 PM
Old 05-24-2013
The way I interpret the description of the problem, the 1st line to be deleted is line 64. Then there is a loop where 26 lines are deleted and 62 lines are copied until we run out of input lines. The following does this:
Code:
#!/bin/ksh
CopyCount=62    # # of lines to copy
FirstSkip=64    # Line # of 1st line to skip
SkipCount=26    # # of lines to skip
awk -v fs="$FirstSkip" -v cc="$CopyCount" -v sc="$SkipCount" '
BEGIN { i = fs - 1;j = sc }
i     { i--;print;next }
j     { j--;next }
      { i = cc - 1;j = sc;print }' file

I use the Korn shell, but this will work with any shell that recognizes basic Bourne shell syntax. If you are using a Solaris/SunOS system, use /usr/xpg4/bin/awk, /usr/xpg6/bin/awk, or nawk instead of awk.
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curs_deleteln(3X)														 curs_deleteln(3X)

NAME
deleteln, wdeleteln, insdelln, winsdelln, insertln, winsertln - delete and insert lines in a curses window SYNOPSIS
#include <curses.h> int deleteln(void); int wdeleteln(WINDOW *win); int insdelln(int n); int winsdelln(WINDOW *win, int n); int insertln(void); int winsertln(WINDOW *win); DESCRIPTION
The deleteln and wdeleteln routines delete the line under the cursor in the window; all lines below the current line are moved up one line. The bottom line of the window is cleared. The cursor position does not change. The insdelln and winsdelln routines, for positive n, insert n lines into the specified window above the current line. The n bottom lines are lost. For negative n, delete n lines (starting with the one under the cursor), and move the remaining lines up. The bottom n lines are cleared. The current cursor position remains the same. The insertln and winsertln routines, insert a blank line above the current line and the bottom line is lost. RETURN VALUE
All routines return the integer ERR upon failure and an OK (SVr4 specifies only "an integer value other than ERR") upon successful comple- tion. PORTABILITY
These functions are described in the XSI Curses standard, Issue 4. The standard specifies that they return ERR on failure, but specifies no error conditions. NOTES
Note that all but winsdelln may be macros. These routines do not require a hardware line delete or insert feature in the terminal. In fact, they won't use hardware line delete/insert unless idlok(..., TRUE) has been set on the current window. SEE ALSO
curses(3X) curs_deleteln(3X)
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