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Check if system is 32bit or 64bit

Terminal - Check if system is 32bit or 64bit
arch
2013-01-02 17:52:14
User: anapsix
Functions: arch
16
Check if system is 32bit or 64bit

Alternatives

There are 2 alternatives - vote for the best!

Terminal - Alternatives
getconf LONG_BIT
2009-08-08 21:22:19
User: caiosba
Functions: getconf
Tags: getconf 32 64
105

Easy and direct way to find this out.

getconf LONG_BIT
2012-12-12 23:51:51
User: varghjarta
Functions: getconf
20

Needed a quick way to see if my server distro that I setup years ago was running 32bit or not, since with time I had forgotten.

Note: does not check _hardware_ e.g. /proc/cpuinfo but rather the kernel installed

sudo lshw -C cpu|grep width
grep -q '\<lm\>' /proc/cpuinfo && echo 64 bits || echo 32 bits
2013-02-09 13:01:36
User: sputnick
Functions: echo grep
2

This command tell you if your hardware is 32 or 64 bits even if you install a 32bits OS on a 64 bits hardware.

If your distro don't support the -q switch, try doing :

grep &>/dev/null '\<lm\>' /proc/cpuinfo && echo 64 bits || echo 32 bits
isainfo -v
2013-01-04 03:07:28
User: halcyonblue
1

This is likely only valid on Solaris based systems. Unfortunately a lot of the more universal techniques for determining if a system is 32bit or 64bit on x86 solaris fail to give much more information than "i86pc"

Know a better way?

If you can do better, submit your command here.

What others think

You can also

uname -m

Comment by flojo 204 weeks and 5 days ago

Sometimes the architecture name doesn't contain the bits information. Example:

arch

armv7l

getconf LONG_BIT

32

So I prefer the getconf alternative.

Comment by manuq 203 weeks and 4 days ago

Interesting. I've been using getconf LONG_BIT since I learned it here and if I don't know the arch at all which is rare, I run uname. I guess:

uname -p

outputs the processor info (what it is capable of), but

uname -m

outputs the OS info (what is actually installed)? The -m stands for machine, so I'm not sure.

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Comment by lovelin1987 2 weeks and 5 days ago

Your point of view

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