How to delete first 5 lines and last five lines in all text files Post: 302160167

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Top Forums Shell Programming and Scripting How to delete first 5 lines and last five lines in all text files Post 302160167 by vkesineni on Monday 21st of January 2008 04:05:07 AM

01-21-2008

Registered User

The following also will help

This is just my idea.
------------cut here------------
#!/bin/ksh

echo "Enter No.of lines to remove from TOP : "
read top
echo "Enter No.of lines to remove from BOTTOM :"
read bottom
echo "Enter the file name:"
read fn

tot=`wc -l < $fn`
rmtop=`expr $tot - $top`
rmtail=`expr $tot - $bottom`

echo "Total lines"
echo "-----------"
cat $fn
echo "=================================================================================="
echo "Removing of last $bottom lines"
echo "------------------------------"
cat $fn|head -$rmtop
echo "=================================================================================="
echo "Removing of first $top lines"
echo "----------------------------"
cat $fn|tail -$rmtail
------------------Cut here-------------------------------
----------------------------------------------------------------
Out Put:-
---------
# sh test2.sh
Enter No.of lines to remove from TOP :
4
Enter No.of lines to remove from BOTTOM :
4
Enter the file name:
/venkat/scripts/file3
Total lines
-----------
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
==================================================================================
Removing of last 4 lines
------------------------------
1
2
3
4
5
6
7
8
9
10
11
==================================================================================
Removing of first 4 lines
----------------------------
5
6
7
8
9
10
11
12
13
14
15
#

Last edited by vkesineni; 01-21-2008 at 05:13 AM..

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LEARN ABOUT SUNOS

echo

echo(3XCURSES)						  X/Open Curses Library Functions					    echo(3XCURSES)

NAME

       echo, noecho - enable/disable terminal echo

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 echo(void);

       int noecho(void);

DESCRIPTION

       The  echo()  function enables Echo mode for the current screen. The noecho() function disables Echo mode for the current screen. Initially,
       curses software echo mode is enabled and hardware echo mode of the tty driver is disabled. The echo() and noecho() functions control  soft-
       ware echo only. Hardware echo must remain disabled for the duration of the application, else the behavior is undefined.

RETURN VALUES

       Upon successful completion, these functions return OK. Otherwise, they return ERR.

ERRORS

       No errors are defined.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Unsafe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       getch(3XCURSES), getstr(3XCURSES), initscr(3XCURSES), libcurses(3XCURSES), scanw(3XCURSES), attributes(5), standards(5)

SunOS 5.10							    5 Jun 2002							    echo(3XCURSES)

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