What linux shell command returns a part of a string?


Question

I want to find a linux command that can return a part of the string. In most programming languages, it's the substr() function. Does bash have any command that can be used for this purpose. I want to be able to do something like this... substr "abcdefg" 2 3 - prints cde.


Subsequent similar question:

1
88
5/23/2017 11:46:54 AM

Accepted Answer

If you are looking for a shell utility to do something like that, you can use the cut command.

To take your example, try:

echo "abcdefg" | cut -c3-5

which yields

cde

Where -cN-M tells the cut command to return columns N to M, inclusive.

161
8/28/2015 10:58:58 AM

From the bash manpage:

${parameter:offset}
${parameter:offset:length}
        Substring  Expansion.   Expands  to  up  to length characters of
        parameter starting at the character  specified  by  offset.
[...]

Or, if you are not sure of having bash, consider using cut.


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