-bash: xhost: command not found

参考自：http://blog.csdn.net/csdnones/article/details/51513163，感谢原作者解决了我的问题。

执行xhost +，报以下错误，原因是因未没有安装相关的包（其他类似command not found命令没有可以用这种方式解决）

[root@rac01 ~]# xhost +
-bash: xhost: command not found

安装该包即可：

[root@rac01 ~]# yum whatprovides "*/xhost"
Loaded plugins: product-id, security, subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
base/filelists_db                                                               | 3.4 MB     00:00 ... 
xorg-x11-server-utils-7.7-2.el6.x86_64 : X.Org X11 X server utilities
Repo        : base
Matched from:
Filename    : /usr/bin/xhost

[root@rac01 ~]# yum -y install xorg-x11-server-utils-7.7-2.el6.x86_64
Loaded plugins: product-id, security, subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package xorg-x11-server-utils.x86_64 0:7.7-2.el6 will be installed
--> Processing Dependency: mcpp for package: xorg-x11-server-utils-7.7-2.el6.x86_64
--> Processing Dependency: libXxf86misc.so.1()(64bit) for package: xorg-x11-server-utils-7.7-2.el6.x86_64
--> Running transaction check
---> Package libXxf86misc.x86_64 0:1.0.3-4.el6 will be installed
---> Package mcpp.x86_64 0:2.7.2-4.1.el6 will be installed
--> Processing Dependency: libmcpp.so.0()(64bit) for package: mcpp-2.7.2-4.1.el6.x86_64
--> Running transaction check
---> Package libmcpp.x86_64 0:2.7.2-4.1.el6 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

=======================================================================================================
 Package                           Arch               Version                   Repository        Size
=======================================================================================================
Installing:
 xorg-x11-server-utils             x86_64             7.7-2.el6                 base             155 k
Installing for dependencies:
 libXxf86misc                      x86_64             1.0.3-4.el6               base              18 k
 libmcpp                           x86_64             2.7.2-4.1.el6             base              69 k
 mcpp                              x86_64             2.7.2-4.1.el6             base              23 k

Transaction Summary
=======================================================================================================
Install       4 Package(s)

Total download size: 265 k
Installed size: 570 k
Downloading Packages:
-------------------------------------------------------------------------------------------------------
Total                                                                  2.2 MB/s | 265 kB     00:00     
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
  Installing : libXxf86misc-1.0.3-4.el6.x86_64                                                     1/4 
  Installing : libmcpp-2.7.2-4.1.el6.x86_64                                                        2/4 
  Installing : mcpp-2.7.2-4.1.el6.x86_64                                                           3/4 
  Installing : xorg-x11-server-utils-7.7-2.el6.x86_64                                              4/4 
  Verifying  : libmcpp-2.7.2-4.1.el6.x86_64                                                        1/4 
  Verifying  : xorg-x11-server-utils-7.7-2.el6.x86_64                                              2/4 
  Verifying  : libXxf86misc-1.0.3-4.el6.x86_64                                                     3/4 
  Verifying  : mcpp-2.7.2-4.1.el6.x86_64                                                           4/4

Installed:
  xorg-x11-server-utils.x86_64 0:7.7-2.el6

Dependency Installed:
  libXxf86misc.x86_64 0:1.0.3-4.el6    libmcpp.x86_64 0:2.7.2-4.1.el6    mcpp.x86_64 0:2.7.2-4.1.el6

Complete!