Sponsored Content
Top Forums Shell Programming and Scripting Newb question about getting a word from a text file Post 302575477 by agama on Monday 21st of November 2011 10:55:26 PM
Old 11-21-2011
I assume that the value is unknown, but other content on the line is and you could use grep to print the line from the file. I also assume that there is only one instance of that line in the file. If both are true assumptions, then this will work in either Kshell or bash:

Code:
a=( $(grep "The value.* is" data-filename) )

The array a can then be referenced like ${a[6]}

If there are more than one matching lines, you'll have to do a bit more work than this.

Last edited by agama; 11-21-2011 at 11:56 PM.. Reason: Better pattern
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

newb shell question

I know this is a total begginer question but what is wrong with this picture. My loop wont loop, it just drops me back to the prompt and gives the error "unary operator expected". Any help would be appreciated. here it is, #!/bin/sh selection= while do cat << MENU 1)List files in... (2 Replies)
Discussion started by: Fokus
2 Replies

2. UNIX for Dummies Questions & Answers

Newb question

I don't even know if this should go here but I just would like to know what this means: d0e45878043844ffc41aac437e86b602 I know absolutely nothin' about UNIX, and I found this in a SQL table in a board I run. Someone please tell me what that is in "normal" mode. Pardon me for my... (4 Replies)
Discussion started by: daeglin
4 Replies

3. Shell Programming and Scripting

Newb scripting question, I get the error script not found

This is probably a really simple problem, but goes easy on me I'm still a newb. The problem I have is that a script (we'll call it script.script) I edited won't run for some reason, I get the error "ksh: script.script: not found" The location of my script is as follows: /home/users/arkitech ... (3 Replies)
Discussion started by: Arkitech
3 Replies

4. Shell Programming and Scripting

Can a shell script pull the first word (or nth word) off each line of a text file?

Greetings. I am struggling with a shell script to make my life simpler, with a number of practical ways in which it could be used. I want to take a standard text file, and pull the 'n'th word from each line such as the first word from a text file. I'm struggling to see how each line can be... (5 Replies)
Discussion started by: tricky
5 Replies

5. Shell Programming and Scripting

Another newb question: how to use test for zero-length string ?

Assume $x equals "". If I try: if test -n $x I get the "Expression syntax" error. It works in Linux but not in unix bash. In unix bourne I get "test: argument expected" (4 Replies)
Discussion started by: lumix
4 Replies

6. Shell Programming and Scripting

[Bash]Attempting to Merge text from one file into another file at the line directly under a word

Hello, This is my first post on the forums. So I want to start by thanking anyone who is kind enough to read this post and offer advise. I hope to be an active contributor now that I've found these forums. I have an issue that I figure would be a good first post.. I have 2 text files... (5 Replies)
Discussion started by: efciem
5 Replies

7. Shell Programming and Scripting

Newb with While loop question

My first post here.... I have a few years exp with linux distros and some very basic Python..Ive been intent on learning shell scripting the last few weeks. Please excuse my crude efforts. I am running a program that takes network data containing US city names in plain text. I am TRYING to... (7 Replies)
Discussion started by: dddkkk
7 Replies

8. Shell Programming and Scripting

extract a word from text file name

Hi i want to extract the word present before .txt in the text file. For example, Sample_ab_a.txt ----------> i need 'a' Sample_abc_b.txt -----------> i need 'b' Can anyone help me in getting the word extracted (5 Replies)
Discussion started by: Sindhuap
5 Replies

9. UNIX for Dummies Questions & Answers

NEWB Question - BASH COMMAND RESULT for ${0##*/}

This should be extremely simple and someone will probably answer it in .5 seconds. I need to know what: VARIABLE=${0##*/} does? I do not have a shell handy to just try it in. I am reading through some scripts and need to understand this line. Any help is appreciated. Many thanks! -... (3 Replies)
Discussion started by: chrisgoetz
3 Replies

10. Shell Programming and Scripting

Add a word to Text file

Hello, I have a mysql text file. I want add word to it. Thanks for help. Sample sql file: ,'address','166 Warren Street, NY 12534'),(45215,26556,'phone','(518)811-4145'),(151426,15565,'listing_duration','address','122 Hom Street, NY... (6 Replies)
Discussion started by: hoo
6 Replies
ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME
zgrep - search possibly compressed files for a regular expression SYNOPSIS
zgrep [ grep_options ] [ -e ] pattern filename... DESCRIPTION
Zgrep invokes grep on compressed or gzipped files. These grep options will cause zgrep to terminate with an error code: (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*). All other options specified are passed directly to grep. If no file is specified, then the standard input is decompressed if necessary and fed to grep. Otherwise the given files are uncompressed if necessary and fed to grep. If the GREP environment variable is set, zgrep uses it as the grep program to be invoked. EXIT CODE
2 - An option that is not supported was specified. AUTHOR
Charles Levert (charles@comm.polymtl.ca) SEE ALSO
grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1) ZGREP(1)
All times are GMT -4. The time now is 12:57 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy