OnWorks favicon

lamnodes - Online in the Cloud

Run lamnodes in OnWorks free hosting provider over Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

This is the command lamnodes that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator



lamnodes - Resolve LAM node/CPU notation to Unix hostnames.


lamnodes [-chin] [where]


-c Suppress printing the CPU count for each node.

-h Print the command help menu.

-i Print IP addresses (instead of IP names)

-n Suppress printing CPU count for each node


The lamnodes command is used to resolve LAM node/CPU nomenclature to Unix hostnames. It
can be used to determine the current running configuration of the LAM/MPI run-time
environment, and generate a boot schema that can be used to launch LAM in the future.

By default, lamnodes will print out the node number, default IP name, CPU count, and per-
node flags for each node in the running LAM. gethostbyaddr(3) is used to obtain default
hostnames. If gethostbyaddr(3) fails, the IP number is displayed instead.

This command can be used by setup shell scripts (and the like) to determine information
from a currently-running LAM universe. For example, use lamnodes to resolve particular
CPUs and/or nodes to specific unix hostnames. In a batch environment, lamnodes can be
used to determine which CPUs share a common node (note that MPI_GET_PROCESSOR_NAME can be
used for a similar effect in an MPI program).

lamnodes also shows per-node flags. Currently defined flags are:

origin The node where lamboot was executed.

this_node The node where lamnodes is running.

no_schedule The node will not be used to run MPI and serial processes when N and C are
used to mpirun and lamexec.


lamnodes N -n
Display IP names and CPU counts for all nodes. This output can be saved and later
used with lamboot(1).

lamnodes C -n -c
Display the IP name of the nodes containing each CPU, and suppress the LAM node number
and CPU count. This output can be saved and later used with lamboot(1).

Use lamnodes online using onworks.net services

Free Servers & Workstations

Download Windows & Linux apps

  • 1
    ExpressLuke GSI
    ExpressLuke GSI
    This SourceForge download page was to
    grant users to download my source built
    GSIs, based upon phhusson's great
    work. I build both Android Pie and
    Android 1...
    Download ExpressLuke GSI
  • 2
    PyQt is the Python bindings for
    Digia's Qt cross-platform
    application development framework. It
    supports Python v2 and v3 and Qt v4 and
    Qt v5. PyQt is avail...
    Download PyQt
  • 3
    Gambas3* coding tools and examples for
    use in SMB or other organizations that
    make internal programs. E.g. from
    database fields to class sourcecode with
    Download garlic3
  • 4
    Sardi is a complete restyling and
    optimisation of svg code. 6 choices for
    your applications and 10 kind of folders
    to use in your file manager. The sardi
    Download Sardi
  • 5
    LMMS Digital Audio Workstation
    LMMS Digital Audio Workstation
    LMMS is a free cross-platform software
    which allows you to produce music with
    your computer. If you like this project
    consider getting involved in the project
    Download LMMS Digital Audio Workstation
  • 6
    FreeRTOS Real Time Kernel (RTOS)
    FreeRTOS Real Time Kernel (RTOS)
    FreeRTOS is a market-leading real-time
    operating system (RTOS) for
    microcontrollers and small
    microprocessors. Distributed freely
    under the MIT open source lice...
    Download FreeRTOS Real Time Kernel (RTOS)
  • 7
    Avogadro is an advanced molecular
    editor designed for cross-platform use
    in computational chemistry, molecular
    modeling, bioinformatics, materials
    science and ...
    Download Avogadro
  • More »

Linux commands

  • 1
    abidiff - compare ABIs of ELF files
    abidiff compares the Application Binary
    Interfaces (ABI) of two shared libraries
    in ELF format. It emits a meaningful
    Run abidiff
  • 2
    abidw - serialize the ABI of an ELF
    file abidw reads a shared library in ELF
    format and emits an XML representation
    of its ABI to standard output. The
    emitted ...
    Run abidw
  • 3
    cppo - lightweight cpp-like
    preprocessor for OCaml ...
    Run cppo
  • 4
    cppunit-config - script to get
    information about the installed version
    of cppunit ...
    Run cppunit-config
  • 5
    fwb_ipt - Policy compiler for Cisco IOS
    ACL ...
    Run fwb_iosacl
  • 6
    fwb_ipf - Policy compiler for ipfilter ...
    Run fwb_ipf
  • More »