Fedora 21-This system is not registered to Red Hat Subscription Management
Hi everyone,i just migrated from Elementary os to Fedora 21,and inexperienced with yum package management.how can i resolve this subscription problem?
terminal output-
[root@localhost ~]# yum update
Loaded plugins: fastestmirror, fs-snapshot, langpacks, product-id, subscription-
: manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
http://linux.dropbox.com/fedora/21/repodata/repomd.xml: [Errno 14] HTTP Error 404 - Not Found
Trying other mirror.
Loading mirror speeds from cached hostfile
* fedora: mirrors.ustc.edu.cn
* fedora-debuginfo: mirrors.ustc.edu.cn
* rpmfusion-free: mirrors.ustc.edu.cn
* rpmfusion-free-updates: mirrors.ustc.edu.cn
* rpmfusion-nonfree: mirrors.ustc.edu.cn
* rpmfusion-nonfree-updates: mirrors.ustc.edu.cn
* updates: mirrors.ustc.edu.cn
No packages marked for update
[root@localhost ~]#