How to determine whether a given Linux is 32 bit or 64 bit?

 

86 down vote accepted

Try uname -m. It seems like the uname -m actually gives x86_64 ==> 64-bit kernel i686 ==> 32-bit kernel Otherwise, not for the Linux kernel, but for the CPU, you type: cat /proc/cpuinfo or: grep flags /proc/cpuinfo Under "flags" parameter, you will see various values. Among them, one is named "tm(transparent mode)" or "rm(real mode)" or "lm(long mode)" rm ==> 16-bit processor tm ==> 32-bit processor lm ==> 64-bit processor Note: you can have a 64-bit CPU with a 32-bit kernel installed" 33 down vote If you were running a 64 bit platform you would see x86_64 or something very similar in the output from uname -a To get your specific machine hardware name run uname -m You can also call getconf LONG_BIT which returns either 32 or 64 5 down vote lscpu will list out these among other information regarding your CPU: Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit ... courtesty from link: http://stackoverflow.com/questions/246007/how-to-determine-whether-a-given-linux-is-32-bit-or-64-bit