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Likely you're running a very old Distro.<br />
<br />
Try updating to your latest OS version + retest grep.
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Likely you're running a very old Distro.

Try updating to your latest OS version + retest grep.

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in Linux I'm getting below error message<br />
<br />
&nbsp; &nbsp; grep: support for the -P option is not compiled into this --disable-perl-regexp binary
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in Linux I'm getting below error message

    grep: support for the -P option is not compiled into this --disable-perl-regexp binary

grep: support for the -P option is not compiled into this --disable-perl-regexp binary

Linux is a UNIX-like open source operating system with hundreds of distinct distributions, including: Fedora, openSUSE, Ubuntu, Debian, Slackware, Gentoo, CentOS, and Arch Linux. Linux is generally associated with web and database servers, but has become popular in many niche industries and applications.

Linux

Perl is a high-level, general-purpose, interpreted, dynamic programming languages with over 25 years of development. Perl 5 runs on over 100 platforms from portables to mainframes and is suitable for both rapid prototyping and large-scale development projects.  Perl gained widespread popularity as a Common Gateway Interface (CGI) scripting language, in part due to its regular expression and string parsing abilities. In addition to CGI, Perl is used for graphics programming, system administration, network programming, finance, bioinformatics, and other applications.