Server status query command

CPU

#逻辑CPU个数
[root@fan102 ~]# cat /proc/cpuinfo | grep "processor" | wc -l
64
#物理CPU个数
[root@fan102 ~]# cat /proc/cpuinfo | grep "cpu cores" | uniq
cpu cores	: 16
#CPU核数
[root@fan102 ~]# cat /proc/cpuinfo | grep "physical id" | sort | uniq | wc -l
2

RAM

#默认单位为K
[root@fan102 ~]# free
              total        used        free      shared  buff/cache   available
Mem:      197855552    61050944    99781528      258256    37023080   135791228
Swap:       4194300           0     4194300

#指定单位为G
[root@fan102 ~]# free -g
              total        used        free      shared  buff/cache   available
Mem:            188          58          95           0          35         129
Swap:             3           0           3

#使用合适单位
[root@fan102 ~]# free -h
              total        used        free      shared  buff/cache   available
Mem:           188G         58G         95G        252M         35G        129G
Swap:          4.0G          0B        4.0G