I'm setting up new Linux box, CentOS 4.9

> 
> LSB Version:
>  :core-3.0-ia32:core-3.0-noarch:graphics-3.0-ia32:graphics-3.0-noarch
>  Distributor ID: CentOS Description:
>  CentOS release 4.9 (Final) Release:
>  4.9 Codename: Final
> 
> 
> 

When I login to personnel account via SSH, it shows following welcome message.

```
Last login: Sun Apr 17 21:56:53 2011 from xx.xx.xx.xx

[sh]  w.e.l.c.o.m.e
[sh]  To The Virtual Reality
[sh]  Enjoy and behave !

```

Is my Linux box hacked?
Should I have to reinstall CentOS?