prlimit - get and set process resource limits


   prlimit [options] [--resource[=limits] [--pid PID]

   prlimit [options] [--resource[=limits] command [argument...]


   Given a process id and one or more resources, prlimit tries to retrieve
   and/or modify the limits.

   When command is given, prlimit will run this  command  with  the  given

   The  limits parameter is composed of a soft and a hard value, separated
   by a colon (:), in order to modify the existing values.  If  no  limits
   are  given,  prlimit  will  display  the current values.  If one of the
   values is not given, then the existing one will be  used.   To  specify
   the  unlimited or infinity limit (RLIM_INFINITY), the -1 or 'unlimited'
   string can be passed.

   Because of the nature of limits, the soft limit must be lower or  equal
   to  the  high  limit  (also  called the ceiling).  To see all available
   resource limits, refer to the RESOURCE OPTIONS section.

   soft:hard    Specify both limits.

   soft:        Specify only the soft limit.

   :hard        Specify only the hard limit.

   value        Specify both limits to the same value.


   -h, --help
          Display help text and exit.

          Do not print a header line.

   -o, --output list
          Define the output columns to use.  If no output  arrangement  is
          specified, then a default set is used.  Use --help to get a list
          of all supported columns.

   -p, --pid
          Specify the process id; if none is given,  the  running  process
          will be used.

   --raw  Use the raw output format.

          Verbose mode.

   -V, --version
          Display version information and exit.


   -c, --core[=limits]
          Maximum size of a core file.

   -d, --data[=limits]
          Maximum data size.

   -e, --nice[=limits]
          Maximum nice priority allowed to raise.

   -f, --fsize[=limits]
          Maximum file size.

   -i, --sigpending[=limits]
          Maximum number of pending signals.

   -l, --memlock[=limits]
          Maximum locked-in-memory address space.

   -m, --rss[=limits]
          Maximum Resident Set Size (RSS).

   -n, --nofile[=limits]
          Maximum number of open files.

   -q, --msgqueue[=limits]
          Maximum number of bytes in POSIX message queues.

   -r, --rtprio[=limits]
          Maximum real-time priority.

   -s, --stack[=limits]
          Maximum size of the stack.

   -t, --cpu[=limits]
          CPU time, in seconds.

   -u, --nproc[=limits]
          Maximum number of processes.

   -v, --as[=limits]
          Address space limit.

   -x, --locks[=limits]
          Maximum number of file locks held.

   -y, --rttime[=limits]
          Timeout for real-time tasks.


   prlimit --pid 13134
          Display limit values for all current resources.

   prlimit --pid 13134 --rss --nofile=1024:4095
          Display  the limits of the RSS, and set the soft and hard limits
          for the number of open files to 1024 and 4095, respectively.

   prlimit --pid 13134 --nproc=512:
          Modify only the soft limit for the number of processes.

   prlimit --pid $$ --nproc=unlimited
          Set for the current process both the soft and ceiling values for
          the number of processes to unlimited.

   prlimit --cpu=10 sort -u hugefile
          Set both the soft and hard CPU time limit to ten seconds and run


   prlimit(2), ulimit(1)


   The prlimit system call is supported since Linux 2.6.36, older  kernels
   will break this program.


   Davidlohr Bueso <> - In memory of Dennis M. Ritchie.


   The  prlimit command is part of the util-linux package and is available


Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.

Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.

Free Software

Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.

Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.

Free Books

The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.

Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.


Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.

Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.