How to check whether the centos system version is 32-bit or 64-bit

1.

[root@linuxzgf ~]#getconf LONG_BIT
[root@linuxzgf ~]#getconf WORD_BIT

(In 32-bit systems, the int type and long type are generally 4 bytes. In 64-bit systems, the int type is still 4 bytes, but long has become 8 bytes. In Linux systems, you can use "getconf WORD_BIT" and "getconf LONG_BIT" to obtain the number of word and long digits. In 64-bit systems, you should get 32 ​​and 64 respectively.)

(Recommended tutorial: centos usage tutorial)

2.

[root@linuxzgf ~]#uname -a

If there is x86_64, it is 64-bit, if not, it is 32-bit; the following If it is X686 or A 64-bit system will have two directories, /lib64 and /lib, while a 32-bit system will have only /lib.

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

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 libs), for GNU/Linux 2.6.9, stripped

6.

[root@linuxzgf ~]#uname -m
x86_64
3.# arch
x86_64
i686

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