root@srv1 [~]# yum upgrade
Loaded plugins: fastestmirror, security
Setting up Upgrade Process
Loading mirror speeds from cached hostfile
* base: mirror.saglayici.com
* extras: mirror.saglayici.com
* updates: mirror.saglayici.com
base | 3.7 kB 00:00
extras | 3.4 kB 00:00
updates | 3.4 kB 00:00
No Packages marked for Update
root@srv1 [~]# yum update
Loaded plugins: fastestmirror, security
Setting up Update Process
Loading mirror speeds from cached hostfile
* base: mirror.saglayici.com
* extras: mirror.saglayici.com
* updates: mirror.saglayici.com
No Packages marked for Update
root@srv1 [~]# yum install screen
Loaded plugins: fastestmirror, security
Setting up Install Process
Loading mirror speeds from cached hostfile
* base: mirror.saglayici.com
* extras: mirror.saglayici.com
* updates: mirror.saglayici.com
Package screen-4.0.3-16.el6.x86_64 already installed and latest version
Nothing to do
root@srv1 [~]# yum install scalpel
Loaded plugins: fastestmirror, security
Setting up Install Process
Loading mirror speeds from cached hostfile
* base: mirror.saglayici.com
* extras: mirror.saglayici.com
* updates: mirror.saglayici.com
Nothing to do

programı kurmadı yine.