Re: egrep oddity
On Ne 05-02-12 | 16:03, Neal Murphy wrote:
> For quite some time now, I've been getting peeved with egrep not doing what it
> I have Squeese installed and up-to-date. In an xterm running bash or on a
> console running bash or dash, this command:
> ls -C1 | egrep "^[A-Z]"
> returns all lines except those beginning with 'a'. Even the following commands
> exhibit similar behavior:
> alias|sed -e 's/^a/b/'|egrep "^[A-Z]" # passes sed's output untouched
> alias|sed -e 's/^a/A/'|egrep "^[A-Z]" # passes sed's output untouched
> These commands behave the same way on another Squeeze installation at another
> location. Also, 'grep -E' behaves the same way.
> The commands behave as expected on a different GNU/Linux system.
> Does anyone else see this behavior? Or do I need to clean my pipe and smoke
> something better?
The "^[A-Z]" range will never match line beginning with a, since the range
matches only uppercase characters.
Maybe try using the "egrep -i" (case insensitive option) ?