# cat /proc/cpuinfo | grep physical | sort -n | uniq | wc -l
3
代表3个cpu的个数
查看服务器型号
# dmidecode|grep "System Information" -A9|egrep "Manufacturer|Product"
Manufacturer: HP
Product Name: ProLiant DL170e G6
查看服务器的CPU型号
# cat /proc/cpuinfo | grep name | cut -f2 -d: | uniq
Intel(R) Xeon(R) CPU E5645 @ 2.40GHz
查看当前操作系统发行版信息
# cat /etc/redhat-release
CentOS Linux release 7.5.1804 (Core)
查看到服务器的内核信息
# uname -a
Linux localhost.localdomain 3.10.0-862.el7.x86_64 #1 SMP Fri Apr 20 16:44:24 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
CPU
查看CPU统计信息
# lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 24
On-line CPU(s) list: 0-23
Thread(s) per core: 2
Core(s) per socket: 6
Socket(s): 2
NUMA node(s): 2
Vendor ID: GenuineIntel
CPU family: 6
Model: 44
Model name: Intel(R) Xeon(R) CPU E5645 @ 2.40GHz
Stepping: 2
CPU MHz: 1600.000
CPU max MHz: 2400.0000
CPU min MHz: 1600.0000
BogoMIPS: 4800.63
Virtualization: VT-x
L1d cache: 32K
L1i cache: 32K
L2 cache: 256K
L3 cache: 12288K
NUMA node0 CPU(s): 0-5,12-17
NUMA node1 CPU(s): 6-11,18-23
Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm pcid dca sse4_1 sse4_2 popcnt aes lahf_lm tpr_shadow vnmi flexpriority ept vpid dtherm arat
查看CPU型号
# cat /proc/cpuinfo | grep name | cut -f2 -d: | uniq -c
24 Intel(R) Xeon(R) CPU E5645 @ 2.40GHz
查看物理CPU个数
# cat /proc/cpuinfo| grep "physical id"| sort| uniq| wc -l
2
查看每个物理CPU中core的个数(即核数)
# cat /proc/cpuinfo| grep "cpu cores"| uniq
cpu cores : 6
查看逻辑CPU的个数
# cat /proc/cpuinfo| grep "processor"| wc -l
24
内存
查看概要内存使用情况
# free -g
total used free shared buff/cache available
Mem: 62 0 61 0 0 61
Swap: 31 0 31
查看内存硬件信息
# dmidecode -t memory
# dmidecode 3.0
Getting SMBIOS data from sysfs.
SMBIOS 2.6 present.
Handle 0x001E, DMI type 16, 15 bytes
Physical Memory Array
Location: System Board Or Motherboard
Use: System Memory
Error Correction Type: Multi-bit ECC
Maximum Capacity: 128 GB
Error Information Handle: Not Provided
Number Of Devices: 16
Handle 0x0020, DMI type 17, 28 bytes
Memory Device
Array Handle: 0x001E
Error Information Handle: Not Provided
Total Width: 72 bits
Data Width: 64 bits
Size: 8192 MB
Form Factor: DIMM
Set: None
Locator: PROC 1 DIMM8A
Bank Locator: <BAD INDEX>
Type: DDR3
Type Detail: Other
Speed: 1333 MHz
Manufacturer: Nanya
Serial Number: 113ADB16
Asset Tag: <BAD INDEX>
Part Number: NT8GC72B4NG0NL-CG
Rank: Unknown
Handle 0x0021, DMI type 17, 28 bytes
Memory Device
Array Handle: 0x001E
Error Information Handle: Not Provided
Total Width: Unknown
Data Width: 64 bits
Size: No Module Installed
Form Factor: Other
Set: None
Locator: PROC 1 DIMM7D
Bank Locator: <BAD INDEX>
Type: DDR3
Type Detail: None
Speed: Unknown
Manufacturer: <BAD INDEX>
Serial Number: <BAD INDEX>
Asset Tag: <BAD INDEX>
Part Number: <BAD INDEX>
Rank: Unknown
Handle 0x0022, DMI type 17, 28 bytes
Memory Device
Array Handle: 0x001E
Error Information Handle: Not Provided
Total Width: Unknown
Data Width: 64 bits
Size: No Module Installed
Form Factor: Other
Set: None
Locator: PROC 1 DIMM6G
Bank Locator: <BAD INDEX>
Type: DDR3
Type Detail: None
Speed: Unknown
Manufacturer: <BAD INDEX>
Serial Number: <BAD INDEX>
Asset Tag: <BAD INDEX>
Part Number: <BAD INDEX>
Rank: Unknown
Handle 0x0023, DMI type 17, 28 bytes
Memory Device
Array Handle: 0x001E
Error Information Handle: Not Provided
Total Width: 72 bits
Data Width: 64 bits
Size: 8192 MB
Form Factor: DIMM
Set: None
Locator: PROC 1 DIMM5B
Bank Locator: <BAD INDEX>
Type: DDR3
Type Detail: Other
Speed: 1333 MHz
Manufacturer: Nanya
Serial Number: 0218F8F4
Asset Tag: <BAD INDEX>
Part Number: NT8GC72B4NG0NL-CG
Rank: Unknown
Handle 0x0024, DMI type 17, 28 bytes
Memory Device
Array Handle: 0x001E
Error Information Handle: Not Provided
Total Width: Unknown
Data Width: 64 bits
Size: No Module Installed
Form Factor: Other
Set: None
Locator: PROC 1 DIMM4E
Bank Locator: <BAD INDEX>
Type: DDR3
Type Detail: None
Speed: Unknown
Manufacturer: <BAD INDEX>
Serial Number: <BAD INDEX>
Asset Tag: <BAD INDEX>
Part Number: <BAD INDEX>
Rank: Unknown
Handle 0x0025, DMI type 17, 28 bytes
Memory Device
Array Handle: 0x001E
Error Information Handle: Not Provided
Total Width: Unknown
Data Width: 64 bits
Size: No Module Installed
Form Factor: Other
Set: None
Locator: PROC 1 DIMM3H
Bank Locator: <BAD INDEX>
Type: DDR3
Type Detail: None
Speed: Unknown
Manufacturer: <BAD INDEX>
Serial Number: <BAD INDEX>
Asset Tag: <BAD INDEX>
Part Number: <BAD INDEX>
Rank: Unknown
Handle 0x0026, DMI type 17, 28 bytes
Memory Device
Array Handle: 0x001E
Error Information Handle: Not Provided
Total Width: 72 bits
Data Width: 64 bits
Size: 8192 MB
Form Factor: DIMM
Set: None
Locator: PROC 1 DIMM2C
Bank Locator: <BAD INDEX>
Type: DDR3
Type Detail: Other
Speed: 1333 MHz
Manufacturer: Nanya
Serial Number: 282622D0
Asset Tag: <BAD INDEX>
Part Number: NT8GC72B4NG0NK-CG
Rank: Unknown
Handle 0x0027, DMI type 17, 28 bytes
Memory Device
Array Handle: 0x001E
Error Information Handle: Not Provided
Total Width: 72 bits
Data Width: 64 bits
Size: 8192 MB
Form Factor: DIMM
Set: None
Locator: PROC 1 DIMM1F
Bank Locator: <BAD INDEX>
Type: DDR3
Type Detail: Other
Speed: 1333 MHz
Manufacturer: Nanya
Serial Number: 2A0CE8EC
Asset Tag: <BAD INDEX>
Part Number: NT8GC72B4NG0NK-CG
Rank: Unknown
Handle 0x0028, DMI type 17, 28 bytes
Memory Device
Array Handle: 0x001E
Error Information Handle: Not Provided
Total Width: 72 bits
Data Width: 64 bits
Size: 8192 MB
Form Factor: DIMM
Set: None
Locator: PROC 2 DIMM8A
Bank Locator: <BAD INDEX>
Type: DDR3
Type Detail: Other
Speed: 1333 MHz
Manufacturer: Nanya
Serial Number: 143AC429
Asset Tag: <BAD INDEX>
Part Number: NT8GC72B4NG0NL-CG
Rank: Unknown
Handle 0x0029, DMI type 17, 28 bytes
Memory Device
Array Handle: 0x001E
Error Information Handle: Not Provided
Total Width: 72 bits
Data Width: 64 bits
Size: 8192 MB
Form Factor: DIMM
Set: None
Locator: PROC 2 DIMM7D
Bank Locator: <BAD INDEX>
Type: DDR3
Type Detail: Other
Speed: 1333 MHz
Manufacturer: Nanya
Serial Number: 143AFCF0
Asset Tag: <BAD INDEX>
Part Number: NT8GC72B4NG0NL-CG
Rank: Unknown
Handle 0x002A, DMI type 17, 28 bytes
Memory Device
Array Handle: 0x001E
Error Information Handle: Not Provided
Total Width: Unknown
Data Width: 64 bits
Size: No Module Installed
Form Factor: Other
Set: None
Locator: PROC 2 DIMM6G
Bank Locator: <BAD INDEX>
Type: DDR3
Type Detail: None
Speed: Unknown
Manufacturer: <BAD INDEX>
Serial Number: <BAD INDEX>
Asset Tag: <BAD INDEX>
Part Number: <BAD INDEX>
Rank: Unknown
Handle 0x002B, DMI type 17, 28 bytes
Memory Device
Array Handle: 0x001E
Error Information Handle: Not Provided
Total Width: 72 bits
Data Width: 64 bits
Size: 8192 MB
Form Factor: DIMM
Set: None
Locator: PROC 2 DIMM5B
Bank Locator: <BAD INDEX>
Type: DDR3
Type Detail: Other
Speed: 1333 MHz
Manufacturer: Nanya
Serial Number: 0418F927
Asset Tag: <BAD INDEX>
Part Number: NT8GC72B4NG0NL-CG
Rank: Unknown
Handle 0x002C, DMI type 17, 28 bytes
Memory Device
Array Handle: 0x001E
Error Information Handle: Not Provided
Total Width: Unknown
Data Width: 64 bits
Size: No Module Installed
Form Factor: Other
Set: None
Locator: PROC 2 DIMM4E
Bank Locator: <BAD INDEX>
Type: DDR3
Type Detail: None
Speed: Unknown
Manufacturer: <BAD INDEX>
Serial Number: <BAD INDEX>
Asset Tag: <BAD INDEX>
Part Number: <BAD INDEX>
Rank: Unknown
Handle 0x002D, DMI type 17, 28 bytes
Memory Device
Array Handle: 0x001E
Error Information Handle: Not Provided
Total Width: Unknown
Data Width: 64 bits
Size: No Module Installed
Form Factor: Other
Set: None
Locator: PROC 2 DIMM3H
Bank Locator: <BAD INDEX>
Type: DDR3
Type Detail: None
Speed: Unknown
Manufacturer: <BAD INDEX>
Serial Number: <BAD INDEX>
Asset Tag: <BAD INDEX>
Part Number: <BAD INDEX>
Rank: Unknown
Handle 0x002E, DMI type 17, 28 bytes
Memory Device
Array Handle: 0x001E
Error Information Handle: Not Provided
Total Width: 72 bits
Data Width: 64 bits
Size: 8192 MB
Form Factor: DIMM
Set: None
Locator: PROC 2 DIMM2C
Bank Locator: <BAD INDEX>
Type: DDR3
Type Detail: Other
Speed: 1333 MHz
Manufacturer: Nanya
Serial Number: 143AC59D
Asset Tag: <BAD INDEX>
Part Number: NT8GC72B4NG0NL-CG
Rank: Unknown
Handle 0x002F, DMI type 17, 28 bytes
Memory Device
Array Handle: 0x001E
Error Information Handle: Not Provided
Total Width: Unknown
Data Width: 64 bits
Size: No Module Installed
Form Factor: Other
Set: None
Locator: PROC 2 DIMM1F
Bank Locator: <BAD INDEX>
Type: DDR3
Type Detail: None
Speed: Unknown
Manufacturer: <BAD INDEX>
Serial Number: <BAD INDEX>
Asset Tag: <BAD INDEX>
Part Number: <BAD INDEX>
Rank: Unknown
查看内存详细使用情况
# cat /proc/meminfo
MemTotal: 65797728 kB
MemFree: 64803200 kB
MemAvailable: 64772600 kB
Buffers: 2132 kB
Cached: 336276 kB
SwapCached: 0 kB
Active: 222108 kB
Inactive: 186012 kB
Active(anon): 70140 kB
Inactive(anon): 8708 kB
Active(file): 151968 kB
Inactive(file): 177304 kB
Unevictable: 0 kB
Mlocked: 0 kB
SwapTotal: 33030140 kB
SwapFree: 33030140 kB
Dirty: 0 kB
Writeback: 0 kB
AnonPages: 69720 kB
Mapped: 22640 kB
Shmem: 9136 kB
Slab: 111972 kB
SReclaimable: 41016 kB
SUnreclaim: 70956 kB
KernelStack: 4960 kB
PageTables: 3960 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 65929004 kB
Committed_AS: 226800 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 396496 kB
VmallocChunk: 34325399548 kB
HardwareCorrupted: 0 kB
AnonHugePages: 14336 kB
CmaTotal: 0 kB
CmaFree: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 169408 kB
DirectMap2M: 6113280 kB
DirectMap1G: 62914560 kB
查看内存的插槽数,已经使用多少插槽.每条内存多大
# dmidecode|grep -A5 "Memory Device"|grep Size|grep -v Range
Size: 8192 MB
Size: No Module Installed
Size: No Module Installed
Size: 8192 MB
Size: No Module Installed
Size: No Module Installed
Size: 8192 MB
Size: 8192 MB
Size: 8192 MB
Size: 8192 MB
Size: No Module Installed
Size: 8192 MB
Size: No Module Installed
Size: No Module Installed
Size: 8192 MB
Size: No Module Installed
硬盘
查看硬盘和分区分布
# dmidecode|grep -A5 "Memory Device"|grep Size|grep -v Range
Size: 8192 MB
Size: No Module Installed
Size: No Module Installed
Size: 8192 MB
Size: No Module Installed
Size: No Module Installed
Size: 8192 MB
Size: 8192 MB
Size: 8192 MB
Size: 8192 MB
Size: No Module Installed
Size: 8192 MB
Size: No Module Installed
Size: No Module Installed
Size: 8192 MB
Size: No Module Installed
# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 410.1G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 409.1G 0 part
├─centos-root 253:0 0 50G 0 lvm /
├─centos-swap 253:1 0 31.5G 0 lvm [SWAP]
└─centos-home 253:2 0 327.6G 0 lvm /home
查看硬盘和分区的详细信息
# fdisk -l
Disk /dev/sda: 440.3 GB, 440345714688 bytes, 860050224 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x000bf90f
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 2099199 1048576 83 Linux
/dev/sda2 2099200 860049407 428975104 8e Linux LVM
Disk /dev/mapper/centos-root: 53.7 GB, 53687091200 bytes, 104857600 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/mapper/centos-swap: 33.8 GB, 33822867456 bytes, 66060288 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/mapper/centos-home: 351.8 GB, 351755304960 bytes, 687022080 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes