12-01-2010
need to delete all lines from a group of files except the 1st 2 lines
Hello,
I have a group of text files with many lines in each file.
I need to delete all the lines in each and only leave 2 lines in each file.
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi
I want to delete first five and last five lines in text files without opening the file and also i want to keep the same file name for all the files.
Thanks in advance!!!
Ragav (10 Replies)
Discussion started by: ragavendran31
10 Replies
2. Shell Programming and Scripting
Input:
a
b
b
c
d
d
I need:
a
c
I know how to get this (the lines that have duplicates) :
b
d
sort file | uniq -d
But i need opossite of this. I have searched the forum and other places as well, but have found solution for everything except this variant of the problem. (3 Replies)
Discussion started by: necroman08
3 Replies
3. Shell Programming and Scripting
First of all, I know this can be more eassily done with perl or other scripting languages but, that's not the issue. I need this in sed. (or wander if it's possible )
I got a file (trace file to recreate the control file from oracle for the dba boys)
which contains
some lines
another line... (11 Replies)
Discussion started by: plelie2
11 Replies
4. AIX
I have a rather large file that needs lines deleted periodically. How may I accomplish this task? Should I run into an error message "not enough disk space" AIX 5.3
Thanks (2 Replies)
Discussion started by: tfort73
2 Replies
5. UNIX for Dummies Questions & Answers
Hiiii
I have a file which contains huge data as
a.dat:
PDE 1990 1 9 18 51 28.90 24.7500 95.2800 118.0 6.1 0.0 BURMA
event name: 010990D
time shift: 7.3000
half duration: 5.0000
latitude: 24.4200
longitude: 94.9500
depth: 129.6000
Mrr: ... (7 Replies)
Discussion started by: reva
7 Replies
6. UNIX for Advanced & Expert Users
Hi All,
I have a very huge file (4GB) which has duplicate lines. I want to delete duplicate lines leaving unique lines. Sort, uniq, awk '!x++' are not working as its running out of buffer space.
I dont know if this works : I want to read each line of the File in a For Loop, and want to... (16 Replies)
Discussion started by: krishnix
16 Replies
7. Shell Programming and Scripting
hey guys,
I tried searching but most 'search and replace' questions are related to one liners.
Say I have a file to be replaced that has the following:
$ cat testing.txt
TESTING
AAA
BBB
CCC
DDD
EEE
FFF
GGG
HHH
ENDTESTING
This is the input file: (3 Replies)
Discussion started by: DeuceLee
3 Replies
8. Shell Programming and Scripting
Hello,
I'm trying to figure out how to use sed or awk to delete single lines in a file. By single, I mean lines that are not touching any other lines (just one line with white space above and below).
Example:
one
two
three
four
five
six
seven
eight
I want it to look like: (6 Replies)
Discussion started by: slimjbe
6 Replies
9. Shell Programming and Scripting
hi
i have a set of similar files. i want to delete lines until certain pattern appears in those files. for a single file the following command can be used but i want to do it for all the files at a time since the number is in thousands.
awk '/PATTERN/{i++}i' file (6 Replies)
Discussion started by: anurupa777
6 Replies
10. UNIX for Beginners Questions & Answers
Hi all,
I'm looking for a way (sed or awk) to delete multiple lines between blank lines containing two patterns ex:
user: alpha
parameter_1 = 15
parameter_2 = 1
parameter_3 = 0
user: alpha
parameter_1 = 15
parameter_2 = 1
parameter_3 = 0
user: alpha
parameter_1 = 16... (3 Replies)
Discussion started by: ce9888
3 Replies
LEARN ABOUT NETBSD
winsdelln
CURSES_INSDEL(3) BSD Library Functions Manual CURSES_INSDEL(3)
NAME
curses_insdelln, insdelln, winsdelln -- curses insert or delete lines routines
LIBRARY
Curses Library (libcurses, -lcurses)
SYNOPSIS
#include <curses.h>
int
insdelln(int n);
int
winsdelln(WINDOW *win, int n);
DESCRIPTION
These functions insert or delete lines on stdscr or on the specified window.
If insdelln() is called with a positive number in n, then the specified number of lines are inserted before the current line on stdscr. The
last n lines of the screen are no longer displayed. If n is negative, then n lines are deleted from stdscr, starting at the current line.
The last n lines of stdscr are cleared.
The winsdelln() function is the same as the insdelln() function, excepting that lines are inserted or deleted from the window specified by
win.
If a scrolling region has been set with the setscrreg() or wsetscrreg() functions and the current cursor position is inside the scrolling
region, then only the lines from the current line to the bottom of the scrolling region are affected.
RETURN VALUES
Functions returning pointers will return NULL if an error is detected. The functions that return an int will return one of the following
values:
OK The function completed successfully.
ERR An error occurred in the function.
SEE ALSO
curses_deleteln(3), curses_insertln(3), curses_scroll(3)
STANDARDS
The NetBSD Curses library complies with the X/Open Curses specification, part of the Single Unix Specification.
HISTORY
The Curses package appeared in 4.0BSD.
BSD
August 12, 2002 BSD