Mkdir dynamic variable Help

Matthew Ennis

New Member
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Hey,

I'm very new to using CLI and bash scripts (and programming in general) so excuse me if this is bare bones.

Basically the problem I'm having is I have a bash script which needs to make a new directory named as a concatenation of the names of two files that have been passed to the script. I need this to be done using dynamic variables, '$1' and '$2' etc etc..

Something like this:

COMMAND:

bash script.sh one.txt two.txt

CONTENTS OF SCRIPT.SH:

mkdir 'concat_<I don't know what to put it in here to get one.txt and two.txt>'


So the desired directory name is concat_one.txt_two.txt



This is going to be done many times as I'm using this script with a DSL called Nextflow which will read in more files in parallel (three.txt, four.txt etc etc etc..)


Any help and guidance would be much appreciated!
 


kenJackson

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Try
Code:
mkdir "$1$2"
or
Code:
mkdir "${1}_$2"
You can always use curly braces, but you only really need them to avoid confusing the command parser. You don't even need them here because $1_ would be an invalid variable.
 

Matthew Ennis

New Member
Credits
0
Try
Code:
mkdir "$1$2"
or
Code:
mkdir "${1}_$2"
You can always use curly braces, but you only really need them to avoid confusing the command parser. You don't even need them here because $1_ would be an invalid variable.

Ah, curly braces. I think that's it. Knew it was something simple.

Thanks a bunch!
 


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