1.How to Enable EPEL Repository for RHEL/CentOS 7.x/6.x/5.x

http://www.tecmint.com/how-to-enable-epel-repository-for-rhel-centos-6-5/

## RHEL/CentOS 6 64-Bit ##
# wget http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
# rpm -ivh epel-release-6-8.noarch.rpm

2.How to Install Oracle VirtualBox 5.0.10 on CentOS/RedHat 7/6/5 and Fedora 23/22

How to Install Oracle VirtualBox 5.0.10 on CentOS/RedHat 7/6/5 and Fedora 23/22

3.Centos6 install array30

# yum install ibus-table-chinese-array

4.Error Problem Connecting for XRDP

http://linuxtoolkit.blogspot.tw/2014/11/error-problem-connecting-for-xrdp.html

After yum install xrdp and starting the service, I encountered the error during remote desktop to the Linux Box.

connecting to sesman ip 127.0.0.1 port 3350
sesman connect ok
sending login info to session manager, please wait...
xrdp_mm_process_login_reponse: login successful for display
started connecting
connecting to 127.0.0.1 5910
error - problem connecting

the solution is quite simple. You need to install the tigervnc-server package and just the tigervnc only.

# yum install tigervnc-server
# service xrdp restart