CentOS

Today i have a problem with centos 6.4

in the terminal, alert mesenger as attached

i tried restart the system but cannot do anything when login after that

Help!

CentOS 6.4 is from early 2013 and is completely out of date and highly insecure. You need to update it to the latest CentOS 6 which is 6.10. You can do that by running yum update