linux系统中查看内存大小、硬盘大小、CPU

1、内存

[root@localhost home]# cat /proc/meminfo | head -n 5
MemTotal:        2035624 kB      ## 总的内存大小
MemFree:          824528 kB
MemAvailable:    1221384 kB
Buffers:            1780 kB
Cached:           496032 kB

[root@localhost home]# cat /proc/meminfo | head -n 1 | awk '{print $2/(1024 * 1024),"G"}'
1.94132 G

[root@localhost home]# free -h
             total       used       free     shared    buffers     cached
Mem:          1.9G       1.2G       782M        10M       1.7M       474M
-/+ buffers/cache:       728M       1.2G
Swap:         2.0G         0B       2.0G

2、硬盘

[root@localhost home]# df -h
Filesystem             Size  Used Avail Use% Mounted on
/dev/mapper/rhel-root   18G  3.0G   15G  17% /
devtmpfs               985M     0  985M   0% /dev
tmpfs                  994M  136K  994M   1% /dev/shm
tmpfs                  994M  8.8M  986M   1% /run
tmpfs                  994M     0  994M   0% /sys/fs/cgroup
/dev/sda1              497M  119M  379M  24% /boot
/dev/sr0               3.5G  3.5G     0 100% /media/cdrom

[root@localhost home]# fdisk -l |grep Disk
Disk /dev/sda: 21.5 GB, 21474836480 bytes, 41943040 sectors
Disk label type: dos
Disk identifier: 0x00094211
Disk /dev/mapper/rhel-root: 18.8 GB, 18798870528 bytes, 36716544 sectors
Disk /dev/mapper/rhel-swap: 2147 MB, 2147483648 bytes, 4194304 sectors

3、cpu信息

[root@localhost home]# lscpu
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                1
On-line CPU(s) list:   0
Thread(s) per core:    1
Core(s) per socket:    1
Socket(s):             1
NUMA node(s):          1
Vendor ID:             AuthenticAMD
CPU family:            23
Model:                 113
Model name:            AMD Ryzen 5 3600X 6-Core Processor
Stepping:              0
CPU MHz:               3800.007
BogoMIPS:              7600.01
Virtualization:        AMD-V
Hypervisor vendor:     VMware
Virtualization type:   full
L1d cache:             32K
L1i cache:             32K
L2 cache:              512K
L3 cache:              32768K
NUMA node0 CPU(s):     0

[root@localhost home]# cat /proc/cpuinfo | grep "physical id" | uniq | wc -l      
## 查看物理CPU的个数
1

[root@localhost home]# cat /proc/cpuinfo | grep "cpu cores" | uniq   ## 物理cpu的核心数
cpu cores    : 1

[root@localhost home]# cat /proc/cpuinfo | grep 'model name' |uniq    ## cpu的型号
model name    : AMD Ryzen 5 3600X 6-Core Processor

补充：物理cpu和逻辑cpu

root@PC1:/home/test# cat /proc/cpuinfo | grep 'model name' |uniq   ## 查看cpu的型号
model name      : AMD Ryzen 5 3600X 6-Core Processor

root@PC1:/home/test# cat /proc/cpuinfo| grep "physical id"| sort| uniq| wc -l   
## 物理cpu的个数
2

root@PC1:/home/test# cat /proc/cpuinfo| grep "cpu cores"| uniq     
## 每个物理cpu中的核心数
cpu cores       : 4

root@PC1:/home/test# cat /proc/cpuinfo| grep "processor"| wc -l    ##逻辑cpu的个数
8