RLIMIT_AS The maximum size of the process’s virtual memory (address space)
 RLIMIT_CORE Maximum size of core file. 
 RLIMIT_CPU CPU time limit in seconds. 
 RLIMIT_DATA The maximum size of the process’s data segment 
 RLIMIT_FSIZE The maximum size of files that the process may create.
 RLIMIT_LOCKS A limit on the combined number of flock() locks and fcntl() leases 
 RLIMIT_MEMLOCK The maximum number of bytes that may be locked into RAM.
 RLIMIT_MSGQUEUE number of bytes that can be allocated for POSIX message queues
 RLIMIT_NICE ceiling to which the process’s nice value can be raised 
 RLIMIT_NOFILE one greater than the maximum file descriptor number
 RLIMIT_NPROC maximum number of processes
 RLIMIT_RSS limit (in pages) of the process’s resident set
 RLIMIT_RTPRIO ceiling on the real-time priority that may be set
 RLIMIT_RTTIME limit on the amount of CPU time, real-time scheduling 
 RLIMIT_SIGPENDING limit on the number of signals that may be queued
 RLIMIT_STACK The maximum size of the process stack, in bytes.