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Top Forums UNIX for Beginners Questions & Answers Finding and renaming files with exceptions Post 302970467 by azurite on Wednesday 6th of April 2016 09:47:37 PM
Old 04-06-2016
Hello,

Wow! Thank you for taking the time to write great explanations! I have printed it out and will re-read everything to really understand it.

Instead of creating new threads, is it okay if I keep posting new questions in this thread?

If so, I have a question on creating variables. I have tried to research and come up with a solution (to the text quoted below) on my own but I do not know if I am on the right track. If possible could you tell me if I am moving in the right direction?

Quote:
So as far as trying to distinguish between "100_eddy_corrected_brain.nii.gz" and "100_eddy_corrected_brain_mask.nii.gz" if you could define the first as a variable, say $eddy_file or something of the sort, you could pipe it through to a cut command defining a period as your delimiter and take everything in front of it, so something like:
{echo $eddy_file | cut -d. -f1}_mask.nii.gz

But that would depend on using the "set" command to create the variable.
I have come up with the following: though I am not sure what is meant by using the 'set' command.

Code:
#/bin/bash
eddy_file=`cat eddy_corrected_brain.txt`
echo $eddy_file

The eddy_corrected_brain.txt is a text file with pathnames of all the files that match eddy_corrected_brain.nii.gz from the initial find command/results.

Thank you again!
 

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echo(1B)					     SunOS/BSD Compatibility Package Commands						  echo(1B)

NAME
echo - echo arguments to standard output SYNOPSIS
/usr/ucb/echo [-n] [argument] DESCRIPTION
echo writes its arguments, separated by BLANKs and terminated by a NEWLINE, to the standard output. echo is useful for producing diagnostics in command files and for sending known data into a pipe, and for displaying the contents of envi- ronment variables. For example, you can use echo to determine how many subdirectories below the root directory (/) is your current directory, as follows: o echo your current-working-directory's full pathname o pipe the output through tr to translate the path's embedded slash-characters into space-characters o pipe that output through wc -w for a count of the names in your path. example% /usr/bin/echo "echo $PWD | tr '/' ' ' | wc -w" See tr(1) and wc(1) for their functionality. The shells csh(1), ksh(1), and sh(1), each have an echo built-in command, which, by default, will have precedence, and will be invoked if the user calls echo without a full pathname. /usr/ucb/echo and csh's echo() have an -n option, but do not understand back-slashed escape characters. sh's echo(), ksh's echo(), and /usr/bin/echo, on the other hand, understand the black-slashed escape characters, and ksh's echo() also understands a as the audible bell character; however, these commands do not have an -n option. OPTIONS
-n Do not add the NEWLINE to the output. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWscpu | +-----------------------------+-----------------------------+ SEE ALSO
csh(1), echo(1), ksh(1), sh(1), tr(1), wc(1), attributes(5) NOTES
The -n option is a transition aid for BSD applications, and may not be supported in future releases. SunOS 5.10 3 Aug 1994 echo(1B)
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