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Top Forums UNIX for Beginners Questions & Answers Grep command in Linux in a script where the search string has a space Post 303042049 by knijjar on Thursday 12th of December 2019 08:50:25 AM
Old 12-12-2019
Grep command in Linux in a script where the search string has a space

I have a file xyz with the following content
Code:
PPPL 0123
PPPL 0006
POFT 0923
POFT 1111
WENT 2323
SEND 2345

I also have another file named MasterFile where it contains the above mentioned data million times with different digits at the end for example some times it contains SEND 9999 or WENT 9898 or POFT 7898

Sample MasterFile
Code:
Some Data Before the Search String PPPL 0123 Some Data after the search String
Some Data Before the Search String PPPL 9999 Some Data after the search String
Some Data Before the Search String PPPL 8888 Some Data after the search String
Some Data Before the Search String PPPL 0006 Some Data after the search String
Some Data Before the Search String PPPL 7779 Some Data after the search String
Some Data Before the Search String POFT 0923 Some Data after the search String
Some Data Before the Search String POFT 9999 Some Data after the search String
Some Data Before the Search String POFT 8828 Some Data after the search String
Some Data Before the Search String POFT 1111 Some Data after the search String
Some Data Before the Search String WENT 2323 Some Data after the search String
Some Data Before the Search String WENT 9898 Some Data after the search String
Some Data Before the Search String WENT 9999 Some Data after the search String
Some Data Before the Search String SEND 2345 Some Data after the search String
Some Data Before the Search String SEND 6666 Some Data after the search String
Some Data Before the Search String SEND 7777 Some Data after the search String

I am writing my script as the following
Code:
 for i in `cat xyz`
do
grep "$i" MasterFile >> FoundString
done

even when I put the double quotes around
Code:
$i

it doesnt work Can I get some help please
 

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SCRIPT(1)						    BSD General Commands Manual 						 SCRIPT(1)

NAME
script -- make typescript of terminal session SYNOPSIS
script [-a] [-c COMMAND] [-f] [-q] [-t] [file] DESCRIPTION
Script makes a typescript of everything printed on your terminal. It is useful for students who need a hardcopy record of an interactive session as proof of an assignment, as the typescript file can be printed out later with lpr(1). If the argument file is given, script saves all dialogue in file. If no file name is given, the typescript is saved in the file typescript. Options: -a Append the output to file or typescript, retaining the prior contents. -c COMMAND Run the COMMAND rather than an interactive shell. This makes it easy for a script to capture the output of a program that behaves differently when its stdout is not a tty. -f Flush output after each write. This is nice for telecooperation: One person does `mkfifo foo; script -f foo' and another can super- vise real-time what is being done using `cat foo'. -q Be quiet. -t Output timing data to standard error. This data contains two fields, separated by a space. The first field indicates how much time elapsed since the previous output. The second field indicates how many characters were output this time. This information can be used to replay typescripts with realistic typing and output delays. The script ends when the forked shell exits (a control-D to exit the Bourne shell (sh(1)), and exit, logout or control-d (if ignoreeof is not set) for the C-shell, csh(1)). Certain interactive commands, such as vi(1), create garbage in the typescript file. Script works best with commands that do not manipulate the screen, the results are meant to emulate a hardcopy terminal. ENVIRONMENT
The following environment variable is utilized by script: SHELL If the variable SHELL exists, the shell forked by script will be that shell. If SHELL is not set, the Bourne shell is assumed. (Most shells set this variable automatically). SEE ALSO
csh(1) (for the history mechanism), scriptreplay(1). HISTORY
The script command appeared in 3.0BSD. BUGS
Script places everything in the log file, including linefeeds and backspaces. This is not what the naive user expects. AVAILABILITY
The script command is part of the util-linux-ng package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/. Linux July 30, 2000 Linux
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