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Homework and Emergencies Homework & Coursework Questions Shell script help: not working as I like Post 303008000 by Don Cragun on Friday 24th of November 2017 08:44:36 PM
Old 11-24-2017
There are sometimes reasons to store output from a pipeline in a variable and then print the contents of the variable, but you haven't shown us any reason to do that here. Why are you using a variable?

It is ALWAYS a good idea to tell us what operating system and shell you're using when you start a thread in the UNIX & Linux forums. Although most BSD, Linux, and UNIX system commands produce similar output when using common tools and options, there are variations. Knowing what OS and shell you're using helps us avoid suggesting code that will not work in your environment.

If you take your code:
Code:
CS_STUDENTS=$(grep -n '\<CS\>' smallFile)

echo $CS_STUDENTS

and change it to:
Code:
CS_STUDENTS=$(grep -n '\<CS\>' smallFile)

echo Unquoted:$CS_STUDENTS
echo 'Single-Quoted:$CS_STUDENTS'
echo "Double-Quoted:$CS_STUDENTS"

what happens?

You may want to look at the man page for your shell and search for a section titled "Quoting" to see how single-quotes, double-quotes, and back-quotes affect command-line arguments.
 

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script(1)						      General Commands Manual							 script(1)

NAME
script - Makes a transcript of terminal session SYNOPSIS
script [-a] [file] The script command makes a transcript of everything printed on your terminal. OPTIONS
Appends the transcript to file rather than writing it to file. OPERANDS
The name of an output file that will contain the transcript of the session. If this parameter is omitted, the file typescript is written. DESCRIPTION
The transcript is written to file, or appended to file if the -a option is given. If no file name is given, the transcript is saved in the file typescript. The script ends when the forked shell exits. This program is useful when you are using a CRT and want a hard-copy record of the dialog (for example, a technical writer might create an example of a working session this way). If you specify the -a option and the file does not exist, it is created. If you do not specify the -a option and the file exists, it is replaced. RESTRICTIONS
The script command requires a streams based terminal. In single user mode, streams may not be enabled. Under these circumstances, script will exit with no action. If you are the superuser and need to run this command in single user mode, use the following special instruc- tions. Enabling Streams If it is necessary to enable a streams environment in the single user mode, enter the command /sbin/init.d/streams. This command is avail- able to the superuser only. SEE ALSO
Commands: autopush(8), cat(1), echo(1), strsetup(8), tee(1) System Administration script(1)
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