How to remove extra spaces in variable HEAD
?
HEAD=" how to remove extra spaces "
Result:
how to remove extra spaces
Try this:
echo "$HEAD" | tr -s " "
or maybe you want to save it in a variable:
NEWHEAD=$(echo "$HEAD" | tr -s " ")
Update
To remove leading and trailing whitespaces, do this:
NEWHEAD=$(echo "$HEAD" | tr -s " ") NEWHEAD=${NEWHEAD%% } NEWHEAD=${NEWHEAD## }
Using awk:
$ echo "$HEAD" | awk '$1=$1' how to remove extra spaces
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