şunu düzgün şekilde nasıl kurabilirim anlatıcak yokmu?

root@server [~]# yum install duplicity
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: ftp.linux.org.tr
* extras: ftp.linux.org.tr
* updates: ftp.linux.org.tr
base | 3.7 kB 00:00
extras | 3.4 kB 00:00
updates | 3.4 kB 00:00
vz-base | 951 B 00:00
vz-updates | 951 B 00:00
Setting up Install Process
No package duplicity available.
Error: Nothing to do
root@server [~]#