Substitution error - What is this please?

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# 1  
Old 07-29-2011
Substitution error - What is this please?

Hi All,
I have no idea what this line in a script I inherited suppose to do?
Can you help please?

This is the line in the script

 echo "\n[${$0}] this is a test."
this is the output Output
 \n[${$0}] this is a test: bad substitution

What does this line suppose t odo > Any why am I getting this error ?

Last edited by radoulov; 07-29-2011 at 06:13 PM.. Reason: Code tags.
# 2  
Old 07-29-2011
You have one extra '$' - try this:
echo "\n[${0}] this is a test."

It will display one blank line (\n) then display the script name '${0}'.

The '[' and ']' are for decorating purposes.
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# 3  
Old 07-29-2011
Thanks for the explaination much appreciated !!!
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