Sponsored Content
Top Forums Shell Programming and Scripting retain last 1000 line in a file Post 302420438 by Reboot on Tuesday 11th of May 2010 03:45:13 PM
Old 05-11-2010
No, you can't use the command to change the same file.You will have to put the desired output,after applying proper filters, in a seprate file then rename it to the original one...SmilieSmilie
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

retain Line numbers.. in Vi .. OR .. A SHELL SCRIPT

Hello everybody ! GOT SOMETHING INTERESTING... I am trying to retain line number for a text document.. usually we get line numbers in VI using :set nu , but I want to permanently store them. It's a 4000 lines of text and I want grep/search it for a list of words/fields stored in a different... (2 Replies)
Discussion started by: sdlayeeq
2 Replies

2. Shell Programming and Scripting

Command to add 1000 spaces to end of line

hi, could anyone tell me the command to append spaces at the end of the line. for example, i need 1000 spaces after the word "helloworld" echo "helloworld " i need to achieve this in someother way hardcoding 1000 spaces is not practical. as i am totally new... (3 Replies)
Discussion started by: kavithacs
3 Replies

3. UNIX for Dummies Questions & Answers

How to retain the header information of a file

Hi, I am using Bash shell to create some data and these data would be piped out to a file, let say output.txt. This output.txt I would like to add some extra header information such as comments, descriptions and general information on the text. I would like to know how could I maintain... (0 Replies)
Discussion started by: ahjiefreak
0 Replies

4. UNIX for Dummies Questions & Answers

Displays line number 1000 to 2000

Hi, I have 1 million records and want to extract lines betwen 10000 -20000 and put it in another file. Could you please suggest a command for this. Thanks in advance (3 Replies)
Discussion started by: unxusr123
3 Replies

5. Shell Programming and Scripting

Retain file permissions when saving .sh file from internet [OS X]

Hello. I have written a bash script that I am sharing with an OS X community I am a member of. The purpose of the script is to execute a series of commands for members without them having to get involved with Terminal, as it can be daunting for those with no experience of it at all. I have renamed... (4 Replies)
Discussion started by: baza210
4 Replies

6. Shell Programming and Scripting

Retain File Timestamp

There are directories of files that I have to run the dos2ux command on to get ride of the carriage return characters. Easy enough, but I have to retain the original timestamps on the files. I am thinking that I am going to have to strip off the timestamp for each file and convert it to unix time... (3 Replies)
Discussion started by: scotbuff
3 Replies

7. Shell Programming and Scripting

How to retain backslash in a line while reading a data file?

Hello Firends I have a file that contains data within single quotes, which has meaning of its own. When I am trying to parse through the file for a different functionality I noticed that I was loosing the backslash when occurrences in the file look like ('\0'). I would want to retain the... (3 Replies)
Discussion started by: easwam
3 Replies

8. UNIX for Dummies Questions & Answers

cat to a file but retain header

Hi, Is there a way to write to a txt file each day but retain the header on the file? I'm cat'ing 5 files into one .txt file each day but I want the new data to be written after the first 2 lines which are: Progname Size Date Owner ---------------------------- Basically I want my new... (4 Replies)
Discussion started by: Grueben
4 Replies

9. Shell Programming and Scripting

Adding a line to 1000's of files right after x amt of characters.

I am trying to add a single line of text to every file in a particular folder. There are thousands of files in the folder. Each file contains this same start of the first line: {d "%w- %d %m-, %Y - %T"} <some message here> with the rest of the text following the second curly bracket... (10 Replies)
Discussion started by: dlundwall
10 Replies

10. Shell Programming and Scripting

Creating a sequence of numbers in a line for 1000 files

Hi, I try to explain my problem , I have a file like this: aasdsaffsc23 scdsfsddvf46567 mionome0001.pdb asdsdvcxvds dsfdvcvc2324w What I need to do is to create 1000 files in which myname line listing a sequence of numbers from 0001 to 1000. So I want to have : nomefile0001.txt that must... (10 Replies)
Discussion started by: danyz84
10 Replies
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)
All times are GMT -4. The time now is 09:09 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy