pcre

grep has support for Perl compatible regular expressions (PCRE) by using the -P flag, and this provides a number of useful features.  In this article, I’ll show how LookBehind and LookAhead regular expression support can provide enhanced parsing abilities to your shell scripts. For example, consider an xml file “test.xml” with the contents: <root> <path>/my/data</path> … Bash: grep with LookBehind and LookAhead to isolate desired text