[octopus@pc3 Desktop]$ sudo yum install VirtualBox
[sudo] password for octopus:
Loaded plugins: langpacks
Resolving Dependencies
--> Running transaction check
---> Package VirtualBox.x86_64 0:4.3.20-3.fc21 will be installed
--> Processing Dependency: VirtualBox-kmod = 4.3.20 for package: VirtualBox-4.3.20-3.fc21.x86_64
--> Running transaction check
---> Package kmod-VirtualBox-3.18.9-200.fc21.x86_64.x86_64 0:4.3.20-4.fc21.6 will be installed
--> Processing Dependency: kernel-uname-r = 3.18.9-200.fc21.x86_64 for package: kmod-VirtualBox-3.18.9-200.fc21.x86_64-4.3.20-4.fc21.6.x86_64
--> Finished Dependency Resolution
Error: Package: kmod-VirtualBox-3.18.9-200.fc21.x86_64-4.3.20-4.fc21.6.x86_64 (rpmfusion-free-updates)
           Requires: kernel-uname-r = 3.18.9-200.fc21.x86_64
           Installed: kernel-core-3.18.6-200.fc21.x86_64 (@updates)
               kernel-uname-r = 3.18.6-200.fc21.x86_64
           Installed: kernel-core-3.18.7-200.fc21.x86_64 (@updates)
               kernel-uname-r = 3.18.7-200.fc21.x86_64
           Installed: kernel-core-3.19.1-201.fc21.x86_64 (@updates)
               kernel-uname-r = 3.19.1-201.fc21.x86_64
           Available: kernel-core-3.17.4-301.fc21.x86_64 (fedora)
               kernel-uname-r = 3.17.4-301.fc21.x86_64
           Available: kernel-debug-core-3.17.4-301.fc21.x86_64 (fedora)
               kernel-uname-r = 3.17.4-301.fc21.x86_64+debug
           Available: kernel-debug-core-3.19.1-201.fc21.x86_64 (updates)
               kernel-uname-r = 3.19.1-201.fc21.x86_64+debug
 You could try using --skip-broken to work around the problem
 You could try running: rpm -Va --nofiles --nodigest
[octopus@pc3 Desktop]$

[octopus@pc3 Desktop]$ sudo yum install mysql-workbench
[sudo] password for octopus:
Loaded plugins: langpacks
No package mysql-workbench available.
Error: Nothing to do
[octopus@pc3 Desktop]$

只好去官方网站上下载oracle版本的了：
[octopus@pc3 Downloads]$ sudo rpm -ivh VirtualBox-4.3-4.3.26_98988_fedora18-1.x86_64.rpm
[sudo] password for octopus:
warning: VirtualBox-4.3-4.3.26_98988_fedora18-1.x86_64.rpm: Header V4 DSA/SHA1 Signature, key ID 98ab5139: NOKEY
sPreparing...                          udo                                  (100################################# [100%]
 Updating / installing...
   1:VirtualBox-4.3-4.3.26_98988_fedor################################# [100%]

Creating group 'vboxusers'. VM users must be member of that group!

No precompiled module for this kernel found -- trying to build one. Messages
emitted during module compilation will be logged to /var/log/vbox-install.log.

Stopping VirtualBox kernel modules                         [  OK  ]
Uninstalling old VirtualBox DKMS kernel modules            [  OK  ]
Trying to register the VirtualBox kernel modules using DKMS[  OK  ]
Starting VirtualBox kernel modules                         [  OK  ]
[octopus@pc3 Downloads]$ sudo

https://www.virtualbox.org/wiki/Linux_Downloads

用了几个月的virtualbox ose版本，今天只好停止使用了。
遨游浏览器
mysql workbench
wps office也因为这个问题，被迫卸载

现在软件包里似乎找不到mysql workbench了

虽然软件源中的ose版本的VirtualBox无法安装，但还是可以去官方网站上下载rpm的版本安装。

sudo rpm -ivh ***.rpm