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Jeffrey L. Roberts
Asked: 2013-04-21 11:24:43 +0800 CST

Can not seem to get expr substr to work

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Can anyone tell me what I am doing wrong ?

[ /jlr/sub/libexec/vmr-staging ] $ expr substr "onetwothree" 1 4
expr: syntax error

I got the syntax from https://stackoverflow.com/a/220464/1150847

bash

1 Answers

  1. Best Answer

    The substr operation is a non standard extension and not supported on all OSes (probably linux only). The same be achieved with cut:

    echo "onetwothree" | cut -c 1-3
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