yum repolist all
id repo nome repo stato
Dropbox/7 Dropbox Repository disabilitato
!X11_Enlightenment_Factory Enlightenment 17 and EFL devel pr abilitato: 16
!base/7/x86_64 CentOS-7 - Base abilitato: 8465
base-debuginfo/x86_64 CentOS-7 - Debuginfo disabilitato
base-source/7 CentOS-7 - Base Sources disabilitato
centosplus/7/x86_64 CentOS-7 - Plus disabilitato
centosplus-source/7 CentOS-7 - Plus Sources disabilitato
!copr/x86_64 copr abilitato: 111
cr/7/x86_64 CentOS-7 - cr disabilitato
!epel/x86_64 Extra Packages for Enterprise Lin abilitato: 7330
epel-debuginfo/x86_64 Extra Packages for Enterprise Lin disabilitato
epel-source/x86_64 Extra Packages for Enterprise Lin disabilitato
epel-testing/x86_64 Extra Packages for Enterprise Lin disabilitato
epel-testing-debuginfo/x86_64 Extra Packages for Enterprise Lin disabilitato
epel-testing-source/x86_64 Extra Packages for Enterprise Lin disabilitato
!extras/7/x86_64 CentOS-7 - Extras abilitato: 104
extras-source/7 CentOS-7 - Extras Sources disabilitato
fasttrack/7/x86_64 CentOS-7 - fasttrack disabilitato
!google-chrome google-chrome abilitato: 3
!rpmforge RHEL 7 - RPMforge.net - dag disabilitato
rpmforge-extras RHEL 7 - RPMforge.net - extras disabilitato
rpmforge-testing RHEL 7 - RPMforge.net - testing disabilitato
!updates/7/x86_64 CentOS-7 - Updates abilitato: 1723
updates-source/7 CentOS-7 - Updates Sources disabilitato
!virtualbox/7/x86_64 Oracle Linux / RHEL / CentOS-7 / abilitato: 6

e yum check-update
Plugin abilitati:fastestmirror, langpacks
X11_Enlightenment_Factory | 1.2 kB 00:00
base | 3.6 kB 00:00
copr | 3.0 kB 00:00
epel/x86_64/metalink | 24 kB 00:00
epel | 4.4 kB 00:00
extras | 3.4 kB 00:00
google-chrome | 951 B 00:00
updates | 3.4 kB 00:00
virtualbox | 951 B 00:00
epel/x86_64/primary_db | 4.0 MB 00:00
(1/2): epel/x86_64/updateinfo | 306 kB 00:00
(2/2): epel/x86_64/pkgtags | 1.4 MB 00:01