On Oct 14 07:16, rick lavery wrote:
> Up until a recent release of grep I could execute this command in
> cygwin and it worked without any problems.
>
> echo 20081013193545 | egrep -Eo '[0-9]{1,2}'As Corinna pointed out, the command "egrep -E" is redundant, since "grep -E" is just GNUese for "egrep". Use either "grep -Eo" or "egrep -o" instead. The same logic applies to "fgrep" and "grep -F". (Arguably, "egrep" is more portable than "grep -E", since it works on non-GNU versions - and despite the deprecation warnings, I imagine "egrep" and "fgrep" are far too ingrained in far too many shell scripts ever to be removed outright - but the "-o" option is pure GNU anyway.) > This same command still works on other distributions such as centos, > rhel4, rhel5, fedora core 9, etc. It just depends on the version of GNU grep. In 2.5.1, egrep -E is allowed; in 2.5.3, it's not. (I'm not sure about 2.5.2). So, yes, it works on RHEL5, which comes with 2.5.1, but not in, say, Ubuntu 8.04LTS, which comes with 2.5.3. -- Mark J. Reed <[EMAIL PROTECTED]> -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
