arch命令来自英文单词“architecture”的缩写，中文译为“架构”，其功能是用于显示主机硬件架构类型。虽说目前主流硬件架构当数x86_64应用最广泛，但也会偶尔遇到下载了软件包无法安装的情况，这时就要排除下服务器是不是i386、i486、mips、alpha等架构类型了。
语法格式：arch [参数]
常用参数
| –help | 显示帮助信息 |
| –version | 显示版本信息 |
参考实例
显示当前主机硬件架构类型：
[root@linuxcool ~]# arch x86_64
显示命令版本信息：
[root@linuxcool ~]# arch --version arch (GNU coreutils) 8.30 Copyright (C) 2018 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later https://gnu.org/licenses/gpl.html. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Written by David MacKenzie and Karel Zak.