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Full Discussion: Extracting words and lines based on keywords
Top Forums Shell Programming and Scripting Extracting words and lines based on keywords Post 302818861 by seemad on Sunday 9th of June 2013 03:54:36 PM
Old 06-09-2013
Extracting words and lines based on keywords
Hello!

I'm trying to process a text file and am stuck at 2 extractions. Hoping someone can help me here:

1. Given a line in a text file and given a keyword, how can I extract the word preceeding the keyword using a shell command/script?

For example: Given a keyword "world" in the line:
"This really beautiful world goes round and round".

How can I extract the word "beautiful"? it can occur either as 2 separate terms as above "Beautiful World" or a conjoined word as "Beautiful-world". I need to extract Beautiful in either of the cases.
[I tried to get the position of the word, "World" and tried to extract the word before that. But it did gave me the entire piece of string from the beginning. However, I only need to extract the word "Beautiful"
]


2. Given a keyword, say, "design", how can I extract the first paragraph under it?
For example, in the text file, I have the below:
Design:
"This is the design for the experiment to be conducted in July. The requirements have already been signed off by the business. Prior to starting the design phase, ensure that the current design document is available for all departments."

para 2

para 3

I need to extract only the paragraph immediately below design. Is there a way I can do this using Shell commands/script?

Thanks so much in advance.

Regards,
seemad
 

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LEARN ABOUT OPENSOLARIS

shells

shells(4)							   File Formats 							 shells(4)

NAME

       shells - shell database

SYNOPSIS

       /etc/shells

DESCRIPTION

       The shells file contains a list of the shells on the system. Applications use this file to determine whether a shell is valid. See getuser-
       shell(3C). For each shell a single line should be present, consisting of the shell's path, relative to root.

       A hash mark (#) indicates the beginning of a comment; subsequent characters up to the end of the line are not interpreted by  the  routines
       which search the file. Blank lines are also ignored.

       The following default shells are used by utilities: /bin/bash, /bin/csh, /bin/jsh, /bin/ksh, /bin/ksh93, /bin/pfcsh, /bin/pfksh, /bin/pfsh,
       /bin/sh, /bin/tcsh, /bin/zsh, /sbin/jsh, /sbin/sh, /usr/bin/bash, /usr/bin/csh, /usr/bin/jsh, /usr/bin/ksh, /usr/bin/ksh93, /usr/bin/pfcsh,
       /usr/bin/pfksh, /usr/bin/pfsh, and /usr/bin/sh, /usr/bin/tcsh, /usr/bin/zsh, and /usr/sfw/bin/zsh. /etc/shells overrides the default list.

       Invalid shells in /etc/shells could cause unexpected behavior, such as being unable to log in by way of ftp(1).

FILES

       /etc/shells    list of shells on system

SEE ALSO

       vipw(1B), ftpd(1M), sendmail(1M), getusershell(3C), aliases(4)

SunOS 5.11							    20 Nov 2007 							 shells(4)
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