which file stores the process details
 

hi
where is the file located which stores the details about the users processes(ie. the program's which had been run) .is there any command that will show these details.

thank u

the help cmd for processes is :

ps --h

check the /proc filesystem

thank u guys

i need to know the history of the users(the programs executed by the user)
which file does store all the details.

Not sure, but try:
/home/user/.bash_history

As brianL said,
under the home directory of the user you will find .bash_history file which stores all the commands executed in bash shell.

how many can be stored based on the setting in the environment variable HISTORY

check this by typing

env | grep HISTORY