Display-bash-4.1 after logging into the CentOS virtual machine

Http://zhidao.baidu.com/link?url=KwpGOdwFw1oxnL71pvPlfRgbRL_IuQeYRzIYJjiDb2SnX0dQye5yUXqHAGSyuD6u2nDgfe85qNdpNxFITlAe3a

Like my phenomenon, it  should be the deletion of files in the/root directory.  
By this fix should be done, to your own home directory copy BASHRC and bash_profile to/root directory can be
-bash-4.1# Cd/home/shiwenzhao   My home directory
-BASH-4.1#CP./.bashrc/root
-BASH-4.1#CP./.bash_profile/root
-bash-4.1#su-shiwenzhao
[email protected] ~]$ Su-
[Email protected] ~]#

Display-bash-4.1 after logging into the CentOS virtual machine