Sponsored Content
Top Forums Shell Programming and Scripting Unix Shell Novice - File Manipulation Post 302084727 by tayyabq8 on Sunday 13th of August 2006 04:54:53 AM
Old 08-13-2006
Suppose you want to check a file if it contains 15 or more lines and print the 12th line:
Code:
#! /bin/ksh

a=`wc -l filename | awk '{print $1}'`
if [[ $a -gt 15 ]]; then
sed -n '13q;12p' filename
fi

EDIT---
One other way can be:
You want to print nth line of a file
Code:
n=11
head +"$n" filename | tail -1


Last edited by tayyabq8; 08-13-2006 at 06:03 AM..
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Unix scripting-Need help-NOVICE -PLEASE HELP

I really want to get into unix scripting,work with RS6000 -AIX. How do i get started,what books are good for beginners,i am very desperate I have no programming background but ready to scrafice all my time in learning .please help. PLEASE,PLEASE PLEASE ,HELP.... Any advice will realy... (2 Replies)
Discussion started by: Ghanaman
2 Replies

2. UNIX for Dummies Questions & Answers

NEW to Unix (novice)

Heya all Im just reading up on the solaris o/s and unix and i just have the following qustions 1) is the solaris o/s the same as Unix if not how are they different - i.e. are they different operating systems? 2) Can the Unix be loaded from CD without affectin windows o/s just like linux... (2 Replies)
Discussion started by: new214
2 Replies

3. UNIX for Dummies Questions & Answers

UNIX - File/Table/Data manipulation

Hi, I have a table (e.g.): a 1 e 4 5 6 b 2 r 4 4 2 c 5 r 3 7 1 d 9 t 4 4 9 . . What I need to do is to set the values of some values in column 2 to negative values. For example, the values 2 and 9 should become -2 and -9 in the modified file. How should I go about... (2 Replies)
Discussion started by: pc2001
2 Replies

4. Shell Programming and Scripting

Shell script text file manipulation.

Hello, I have mysql binary file which logs all the database queries and i to insert all queries log in to database. First i coverted binary file to text file. and start playing with it. Text file contains following queries, some samples are, SET INSERT_ID=1; INSERT INTO test... (0 Replies)
Discussion started by: mirfan
0 Replies

5. UNIX Desktop Questions & Answers

PC User/UNIX Novice - Where do I start?

Hi all, I am new to the forum and this is my first post. I am an IT professional within a prodominently Windows Environment :D. I would like to learn the basics of UNIX/Solaris/Red Hat etc to create a niche skill on my CV. How do I go about it? -Which OS do I download and from where?... (6 Replies)
Discussion started by: mightymo26
6 Replies

6. AIX

Unix File name manipulation

I need a script that will raname the following file names that beging with 08078* in unix as follows: Rename 08078-08201103-H00044-CA.835 as follows: 08078-110820-H000440CA.835 Bascially it will do this: 1) Keep the first 6 positons. 2) Move the yr from the file name to be the... (4 Replies)
Discussion started by: mrn6430
4 Replies

7. Shell Programming and Scripting

Novice in shell scripting - generating report

Hi I recently joined a project where I have been asked to generate a report using shell script accessing UNIX box. I have no idea on how to do it as I am a beginner and learning shell scripts. Suppose I have a XML: <XYZRequest> <effectiveDate>someDate</effectiveDate>... (2 Replies)
Discussion started by: vat1kor
2 Replies

8. Shell Programming and Scripting

Manipulation of file data with UNIX

Hello , How all doing today.. I have a little doubt in Unix (6 Replies)
Discussion started by: adisky123
6 Replies

9. Shell Programming and Scripting

Stream manipulation in UNIX shell scripting

i have a file something like this : start: 01:00:00 01:30:00 02:30:00 05:30:00 end: 01:13:00 02:00:00 02:40:00 05:45:00 and i want (end - start) total run time in below format: run: 00:13:00 00:30:00 00:10:00 00:15:00 (4 Replies)
Discussion started by: Acme
4 Replies

10. Shell Programming and Scripting

File Manipulation - UNIX script

Hi, I have a file about 100 lines. Each line is about 2000 characters (each line is fixed length). In middle of each line is following constant value 0000040029892586 Now, I want to go through each line and increment by 1. So, line 1 will have 586 line 2 will have 587, line 3 will have... (4 Replies)
Discussion started by: jakSun8
4 Replies
GPIV_PIV2HDF(1) 					      General Commands Manual						   GPIV_PIV2HDF(1)

NAME
gpiv_piv2hdf - Converts PIV-data HDF5 format. SYNOPSIS
gpiv_piv2hdf [-e] [-h | --help] [-p | --print] [-v | --version] [-V | --verbose] filename DESCRIPTION
gpiv_piv2hdf converts ASCII-formattd PIV-data (filename.piv), derived data, like vorticities (filename.vor), strain (filename.sstr, file- name.nstr) and, eventually, raw data images (filename.r), to a HDF5 formatted file filename.hdf. The parameters that have been used for the analysis and post processing are included in filename.hdf. This program does not use the parameter resources from libgpiv. The parameters may be defined by the command line options as explained below. Options -e Exclude PIV data and data from post-processes. -h | --help On-line help. -i Includes image data. -p | --print Prints parameters, command line options and input and output filenames to stdout. The output may be used as parameters of fasty for future use by re-directing stdout to fasty.par. -v | --version Print version information on standard output, then exits successfully. -V | --verbose Program behaves more verbose by printing messages to stdout. filename Input PIV data filename, including .piv extension. SEE ALSO
gpivtools AUTHOR
Gerber Van der Graaf 10 November 2006 GPIV_PIV2HDF(1)
All times are GMT -4. The time now is 03:29 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy