which package provides "equery"

[Stephen Liu]

Hi Vincent,

> just type: aptitude show <package name>
> 
> it will display all the basic information about the package,
> including
> whether it's installed, what repository it's in, the version number,
> the dependencies...

$ aptitude show equery
E: Unable to locate package equery

$ sudo aptitude show equery
Password:
E: Unable to locate package equery


Googling brought me;
http://gentoo-wiki.com/MAN_equery
http://linuxreviews.org/man/equery/


Maybe this package is for Gentoo Linux.  If SO, is there equivalent on
Ubuntu?  It is used to check whether a package is already installed.


Tks.

B.R.
Stephen