This is the expected behaviour of grep. You're trying to use '+' to
mean "one or more matches", but that syntax is not a part of basic
regular expressions. As Andrew Mitchell says, this will work in egrep
(or equivalently grep -E), which tells grep to use extended RE syntax.
Check "man regex" for further details.
** Changed in: grep (Ubuntu)
Status: New => Invalid
--
echo 2 | grep '^[[:digit:]]+$' prints nothing
https://bugs.launchpad.net/bugs/132119
You received this bug notification because you are a member of Ubuntu
Bugs, which is the bug contact for Ubuntu.
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
