How tol limit the file to fixed size?
 

Hi,
I want to limit the file size to 100MB(say0. but i should able to add details (log messages). I dont want the old details in the file ie need only recent updates.( a mechanism which work as a FIFO or pipe )

Have a look at the "logrotate" command.

let me try that.
I have lot of log files dynamicly created with differnt file names.
is there any utility that can implement easly in this contest?

logrotate allows you to specify log names with wildcards (ie to rotate all logs in a certain directory).
See "man logrotate", especially also "olddir" option.

Ihi i dont want to depends on another program.Is there any methord which give full control for me i want a mechanism where i can write my log to a file if it reached the maxsize the older entries automatically remove(from same file no need to back up and all).