UNIX for Advanced & Expert Users

I found that in my system , there are some strange process , it will make the system crash so I would like to control the system no such process is running ,
this is if the system process that its process name is "ora" AND its ppid is not "2" , then it will crash the system, can suggest how to make sure the system no such kind of process is running ? is there method / script can do that ? if run the script with kill command , is it possible to log which pid has been kill ? thx

This question is specific to your system, so would be nice if you included some info about your system. Please post the 'uname -a' output for your system. This will help anyone who wants to help you.

hi ust,

1)." this is if the system process that its process name is "ora" AND its ppid is not "2" , then it will crash the system, "---how u know this?

2). and i like to know what is actually meant by "system crash"? and in windows machine if there is a problem in the os or if we re-install the os we will only loose the datas in the c drive. the remaining drives are still available to use (as per my friends). In unix machine if the system crash, is it possible to have some datas in some paths?..