ulimit

ulimit Man Page

ulimit
User limits - limit the use of system-wide resources.

Syntax
      ulimit [-HS] -a
      ulimit [-HS] [-bcdefiklmnpqrstuvxPRT] [limit]
Key
   -S   Set a soft limit for the given resource.
   -H   Set a hard limit for the given resource.

   -a   All current limits are reported.
   -b   The maximum socket buffer size.
   -c   The maximum size of core files created. 
   -d   The maximum size of a process's data segment.
   -e   The maximum scheduling priority ("nice") 
   -f   The maximum size of files created by the shell(default option).
   -i   The maximum number of pending signals.
   -k   The maximum number of kqueues that may be allocated.
   -l   The maximum size that can be locked into memory. 
   -m   The maximum resident set size. 
   -n   The maximum number of open file descriptors. 
   -p   The pipe buffer size.
   -P   The maximum number of pseudoterminals.
   -q   The maximum number of bytes in POSIX message queues.
   -r   The maximum real-time scheduling priority.
   -R   The maximum time a real-time process can run before blocking, in microseconds.
   -s   The maximum stack size. 
   -t   The maximum amount of cpu time in seconds.
   -T   The maximum number of threads.
   -u   The maximum number of processes available to a single user.
   -v   The maximum amount of virtual memory available to the process.
   -x   The maximum number of file locks.