Kairo Araujo

Inglish (português mais abaixo)

The package basesystem contains no files

# rpm -ql basesystem
(contains no files)

But your discription is very clean:
Basesystem defines the components of a basic Red Hat Linux system (for
example, the package installation order to use during bootstrapping).
Basesystem should be the first package installed on a system and it
should never be removed.

You can check Install Date from this package

# rpm -qi basesystem
Name : basesystem Relocations: (not relocatable)
Version : 8.0 Vendor: Red Hat, Inc.
Release : 4 Build Date: Wed 22 Sep 2004 07:01:44 PM BRT
Install Date: Sat 17 Jan 2009 05:28:37 PM BRST Build Host: tweety.build.redhat.com
Group : System Environment/Base Source RPM: basesystem-8.0-4.src.rpm
Size : 0 License: public domain
Signature : DSA/SHA1, Wed 05 Jan 2005 09:03:37 PM BRST, Key ID 219180cddb42a60e
Packager : Red Hat, Inc.
Summary : The skeleton package which defines a simple Red Hat Linux system.
Description :
Basesystem defines the components of a basic Red Hat Linux system (for
example, the package installation order to use during bootstrapping).
Basesystem should be the first package installed on a system and it
should never be removed.

Português

Checando a data de instalação do Sistema Operacional Linux (Red Hat) – Não oficial, mas utilizavel

O pacote basesystem não contem arquivos

# rpm -ql basesystem
(contains no files)

Mas usa descrição é muito simples:
Basesystem defines the components of a basic Red Hat Linux system (for
example, the package installation order to use during bootstrapping).
Basesystem should be the first package installed on a system and it
should never be removed.

Você pode checar a data de instalação a partir deste pacote

# rpm -qi basesystem
Name : basesystem Relocations: (not relocatable)
Version : 8.0 Vendor: Red Hat, Inc.
Release : 4 Build Date: Wed 22 Sep 2004 07:01:44 PM BRT
Install Date: Sat 17 Jan 2009 05:28:37 PM BRST Build Host: tweety.build.redhat.com
Group : System Environment/Base Source RPM: basesystem-8.0-4.src.rpm
Size : 0 License: public domain
Signature : DSA/SHA1, Wed 05 Jan 2005 09:03:37 PM BRST, Key ID 219180cddb42a60e
Packager : Red Hat, Inc.
Summary : The skeleton package which defines a simple Red Hat Linux system.
Description :
Basesystem defines the components of a basic Red Hat Linux system (for
example, the package installation order to use during bootstrapping).
Basesystem should be the first package installed on a system and it
should never be removed.