5 Command Line Ways to Find Out Linux System is 32-bit or 64-bit

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Senthil Kumar

A Linux Consultant, living in India. He loves very much to write about Linux, Open Source, Computers and Internet. Apart from that, He'd like to review Internet tools and web services.

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10 Responses

  1. DostrenzasLinux says:

    Great post!

    You can also check using a environment variable:

    echo $HOSTTYPE


    i386 -> 32 bits
    x86_64 -> 64 bits

  2. xinchuangfu says:

    You can also use:
    echo $HOSTTYPE

    • Ravi Saive says:


      Thanks for the tip, yes that command worked on my Ubuntu, here is the output.

      [email protected] ~ $ echo $HOSTTYPE
    • SK says:

      Thanks mate. I don’t know this command before. Much appreciated.

  3. Raghavendra Bhat says:

    Anyway your post is apt and of high value. Thanks for your posts, do keep them coming.

  4. Prasanna says:

    I know few of them.
    lshw -class cpu

  5. Aaron Kili K says:

    You can also use:

    uname -m

  6. Raghavendra Bhat says:

    These methods are fine but they cannot conclusively lead you to show whether your CPU can do 64 bit computing. You have to ascertain whether you have a processor that can do 64 bit before you want to do the actual installation of the GNU/Linux port. You need to do the correct installation of the OS port to match your CPU. For that the best tool would be to boot the server/system using a Live GNU/Linux distribution, drop down to the command line and do a ‘cat /proc/cpuinfo | grep flags’ at the root prompt. If you see the ‘lm’ flag then your CPU supports 64 bit computing. If so, you can proceed to install the x86_64/amd64 port of the GNU/Linux distribution.

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