Nice trick just using echo command:
$ str=" a string "
$ echo "[$str]"
[ a string ]
$ new=$(echo $str)
$ echo "[$new]"
[a string]
To trim an entire file:
sed 's/^[ \t]*//;s/[ \t]*$//' < input_file
Nice trick just using echo command:
$ str=" a string "
$ echo "[$str]"
[ a string ]
$ new=$(echo $str)
$ echo "[$new]"
[a string]
To trim an entire file:
sed 's/^[ \t]*//;s/[ \t]*$//' < input_file
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