Detecting Russian characters with grep

Question

I'm trying to detect Russian characters using grep, but what I have at the moment seems to be doing nothing:

 echo "" | grep -Eo "/[--]/u"

The exit is not returned. Is there anything I need to do to get grep to return the result?

+3

Wesley 28 jan. 13 at 17:31

1 answer

Kent · Accepted Answer · 2013-01-28T17:34:05+0000

no way out because grep is looking for a pattern /yourletters/u

try this:

  echo "" | grep -Eo "[--]*"

check here:

kent$  echo "" | grep -Eo "[--]*"