View CPU, memory, hard disk, and other information in Linux

I. CPU Configuration
[Root @ R4 ~] # Cat/proc/cpuinfo | grep "model name" & CAT/proc/cpuinfo | grep "physical ID"
Model name: Intel (r) Xeon (r) CPU x5450 @ 3.00 GHz
Model name: Intel (r) Xeon (r) CPU x5450 @ 3.00 GHz
Model name: Intel (r) Xeon (r) CPU x5450 @ 3.00 GHz
Model name: Intel (r) Xeon (r) CPU x5450 @ 3.00 GHz
Model name: Intel (r) Xeon (r) CPU x5450 @ 3.00 GHz
Model name: Intel (r) Xeon (r) CPU x5450 @ 3.00 GHz
Model name: Intel (r) Xeon (r) CPU x5450 @ 3.00 GHz
Model name: Intel (r) Xeon (r) CPU x5450 @ 3.00 GHz
Physical ID: 0
Physical ID: 1
Physical ID: 0
Physical ID: 1
Physical ID: 0
Physical ID: 1
Physical ID: 0
Physical ID: 1
// 2-core, 4-thread CPU
// Determine the number of CPU cores by having several different "physical IDs"

Ii. Memory size
[Root @ R4 ~] # Cat/proc/meminfo | grep memtotal
Memtotal: 32941268 KB
// 32 GB memory

Memory cleanup:

Free-m

Echo 1>/proc/sys/Vm/drop_caches

Command: dmidecode | grep-A16 "memory device $"

 

Iii. Hard Disk size
[Root @ R4 ~] # Fdisk-L | grep Disk
Disk/dev/SDA: 1887.4 GB, 1887436800000 bytes
Disk/dev/SDB: 1860.5 GB, 1860593254400 bytes
// Two 1.8t Hard Disks

4. swap space
[root @ R4 ~] # Grep swaptotal/proc/meminfo
swaptotal: 10223608 kb