$ yum update
Setting up Update Process
Setting up repositories
update                    100% |=========================|  951 B    00:00
base                      100% |=========================| 1.1 kB    00:00
addons                    100% |=========================|  951 B    00:00
extras                    100% |=========================| 1.1 kB    00:00
Reading repository metadata in from local files
primary.xml.gz            100% |=========================| 4.2 kB    00:00
update    : ################################################## 16/16
Added 16 new packages, deleted 0 old in 0.44 seconds
primary.xml.gz            100% |=========================| 466 kB    00:00
base      : ################################################## 1434/1434
Added 1434 new packages, deleted 0 old in 40.56 seconds
Added 0 new packages, deleted 0 old in 0.01 seconds
extras    : ################################################## 33/33
Added 33 new packages, deleted 0 old in 0.92 seconds
No Packages marked for Update/Obsoletion

増えた