Reprint: Check whether the Linux system version is 32-bit or 64-bit

One

[ROOT@LINUXZGF ~] #getconf long_bit
[ROOT@LINUXZGF ~] #getconf word_bit
(the int and long types in a 32-bit system are generally 4 bytes, and the int type in the 64-bit system is still 4 bytes, but LONG has become a 8-byte inux "getconf word_bit" and "getconf long_bit" are available in the system Gets the number of digits for word and long. 64-bit systems should be 32 and 64, respectively. ）

Two

[ROOT@LINUXZGF ~] #uname-A
If there's a x86_64, it's 64, and there's no 32-bit.
The following is X686 or x86_64 the kernel is 64 bits, i686 or i386 the kernel is 32 bits

Three

Look directly at the method that has no/lib64. 64-bit system will have/lib64 and/lib two directories, 32 bits only/lib one.

Four

[ROOT@LINUXZGF ~] #file/sbin/init
/sbin/init:elf 32-bit LSB executable, Intel 80386, version 1 (SYSV), for Gnu/linux 2.6.9, dynamically linked (uses shared LIBS), for Gnu/linux 2.6.9, stripped
32-bit is the 32-bit Linux, 64-bit, which shows the 64-bit

Five

[ROOT@LINUXZGF ~] #file/bin/cat
/bin/cat:elf 32-bit LSB executable, Intel 80386, version 1 (SYSV), for Gnu/linux 2.6.9, dynamically linked (uses shared L IBS), for Gnu/linux 2.6.9, stripped
32-bit is the 32-bit Linux, 64-bit, which shows the 64-bit

Six

[ROOT@LINUXZGF ~] #uname-M
x86_64
3.# Arch
x86_64
i686

Seven, to see how many bits of CPU

[ROOT@LINUXZGF ~] #more/proc/cpuinfo

Eight

[ROOT@LINUXZGF ~]# Echo $HOSTTYPE
x86_64

The getconf command also obtains basic configuration information about the system, such as the number of operating system bits, memory size, disk size, and so on.
$getconf-A to see detailed system Information

Reprint: Check whether the Linux system version is 32-bit or 64-bit