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Your read command is backwards -

echo "${TEMPFILE:14:2} ${TEMPFILE:16:3} ${TEMPFILE:19:4}" | read a b c

IFS sets the record separator for a read, by default it is space(s). This means the...

All you need to know about playing with strings in bash:

Manipulating Strings (http://tldp.org/LDP/abs/html/string-manipulation.html)

Hi.

It's a shell construct.

It's described under the "Parameter Expansion" section of the shell's man page. So it's fair to assume that "Parameter Expansion" is a good name for it.

here is one way to do it in shell. starts at 0


var=abcdefgh
echo ${var:3:3}