整理linux 查看操作系统、CPU、内存、磁盘等信息

整理linux 查看操作系统、CPU、内存、磁盘等信息

一、查看 cpu 信息

1 、 所 有 信 息 lscpu [root@localhost ~]# lscpu

Architecture: x86_64 ##cpu 架构

CPU op-mode(s): 32-bit, 64-bit

Byte Order: Little Endian

CPU(s): 2 ##总共有 8 核

On-line CPU(s) list: 0,1

Thread(s) per core: 1 ##每个 CPU 支持的线程数Core(s) per socket: 1 ##每个 CPU 的核数Socket(s): 2 ##共有几个 cpu

NUMA node(s): 1

Vendor ID: GenuineIntel

CPU family: 6

Model: 140

Model name: 11th  Gen  Intel(R)  Core(TM)  i7-1165G7  @  2.80GHz  Stepping: 1

CPU MHz: 2803.203

BogoMIPS: 5606.40

Hypervisor vendor: VMware Virtualization type: full

L1d cache: 48K

L1i cache: 32K

L2 cache: 1280K

L3 cache: 12288K NUMA node0 CPU(s): 0,1

  1. 查看内存配置信息:

[root@localhost ~]# cat /proc/cpuinfo | grep name | cut -f2 -d: | uniq -c

2 11th Gen Intel(R) Core(TM) i7-1165G7 @ 2.80GHz

  1. 查看逻辑 cpu:

[root@localhost ~]# cat /proc/cpuinfo |grep "processor"|sort -u|wc -l 2

4…查看物理 cpu:

[root@localhost ~]# grep "physical id" /proc/cpuinfo|sort -u|wc -l 2

5…查看每个物理 cpu 的内核数:

[root@localhost ~]# grep "cpu cores" /proc/cpuinfo|uniq cpu cores 1

  1. 每个物理 CPU 上逻辑 CPU 个数:

[root@localhost ~]# grep "siblings" /proc/cpuinfo|uniq siblings 1

  1. 判断是否开启了抄超线程:

如果多个逻辑CPU 的"physical id"和"core id"均相同,说明开启了超线程或者换句话说

逻辑CPU 个数 > 物理 CPU 个数 * CPU 内核数 开启了超线程逻辑CPU 个数 = 物理 CPU 个数 * CPU 内核数 没有开启超线程

二、查看内存:

  1. free -m/free -h [root@localhost ~]# free -m

total used free shared buff/cache available Mem: 1819 936 110 27 772

705

Swap: 2048 0 2048

[root@localhost ~]# free -h

total used free shared buff/cache available Mem: 1.8G 936M 110M 27M 772M 705M

Swap: 2.0G 0B 2.0G

  1. 查看内存详细信息:

[root@localhost ~]# cat /proc/meminfo MemTotal: 1863028 kB

MemFree: 98728 kB

MemAvailable: 707964 kB

Buffers: 88 kB

Cached: 746408 kB

SwapCached: 0 kB

Active: 1046584 kB

Inactive: 406632 kB

Active(anon): 676952 kB

Inactive(anon): 58260 kB

Active(file): 369632 kB

Inactive(file): 348372 kB

Unevictable: 0 kB

Mlocked: 0 kB

SwapTotal: 2098172 kB

SwapFree: 2098172 kB

Dirty: 0 kB

Writeback: 0 kB

AnonPages: 706804 kB

Mapped: 161072 kB

Shmem: 28492 kB

Slab: 108196 kB

SReclaimable: 44636 kB

SUnreclaim: 63560 kB

KernelStack: 9856 kB

PageTables: 38000 kB

NFS_Unstable: 0 kB

Bounce: 0 kB

WritebackTmp: 0 kB

CommitLimit: 3029684 kB

Committed_AS: 4204640 kB

VmallocTotal: 34359738367 kB

VmallocUsed: 213128 kB

VmallocChunk: 34359277564 kB

Percpu: 55296 kB

HardwareCorrupted: 0 kB

AnonHugePages: 208896 kB

CmaTotal: 0 kB

CmaFree: 0 kB

HugePages_Total: 0

HugePages_Free: 0

HugePages_Rsvd: 0

HugePages_Surp: 0

Hugepagesize: 2048 kB

DirectMap4k: 114560 kB

DirectMap2M: 1982464 kB

DirectMap1G: 0 kB

三、查看磁盘:

  1. 查看磁盘大小:

[root@localhost ~]# df -h

Filesystem Size Used Avail Use  Mounted on

devtmpfs

895M

0

895M

0  /dev

tmpfs

910M

0

910M

0  /dev/shm

tmpfs

910M

11M

900M

2  /run

tmpfs

910M

0

910M

0  /sys/fs/cgroup

/dev/sda3

28G

4.4G

24G 16  /

/dev/sda1

297M

163M

134M 55  /boot

tmpfs

182M 8.0K

182M

1

/run/user/42

tmpfs

182M 0

182M

0

/run/user/0

  1. 查 看 磁 盘 挂 载 情 况 : [root@localhost ~]# lsblk -f

NAME FSTYPE LABEL UUID MOUNTPOINT

sda

├─sda1 xfs b03273da-ba2a-4871-8ae2-29a43a986a71 /boot

├─sda2 swap 5da90dd7-6cdf-406b-bd24-3c7b4a54269a [SWAP]

└─sda3 xfs 4e25f65e-d974-49a1-a07e-cdd5c53b3be6 / sr0

[root@localhost ~]# lsblk

NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT

sda 8:0 0 30G 0 disk

├─sda1 8:1 0 300M 0 part /boot

├─sda2 8:2 0 2G 0 part [SWAP]

└─sda3 8:3 0 27.7G 0 part /

sr0 11:0 1 1024M 0 rom

  1. 查询指定目录的磁盘占用情况

--查看 dm8 目录下各个文件使用情况

[root@DM dm8]# du -h /dm8/

---查看 dm8 文件的总大小[root@DM dm8]# du -s /dm8/ 13900328 /dm8/

四、磁盘调度:

  1. 查看当前系统的 I/O 调度方法,看[]选择的

[root@localhost ~]# cat /sys/block/sda/queue/scheduler noop [deadline] cfq

  1. 临地更改 I/O 调度方法:

例如:想更改到 noop 电梯调度算法:

--首先查看需要更改的磁盘是在哪[root@localhost ~]# fdisk -l

Disk /dev/sda: 32.2 GB, 32212254720 bytes, 62914560 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: 0x000a03f6

Device Boot Start End Blocks Id System

/dev/sda1

*

2048

616447

307200

83

Linux

/dev/sda2

616448

4812799

2098176

82

Linux swap / Solaris

/dev/sda3

4812800

62914559

29050880

83

Linux

[root@localhost ~]# echo noop > /sys/block/sda/queue/scheduler [root@localhost ~]# cat /sys/block/sda/queue/scheduler

[noop] deadline cfq

  1. 想永久的更改 I/O 调度方法,重启之后生效:

[root@localhost ~]# grubby --update-kernel=ALL --args="elevator=deadline"

重启之后,查看调度方法:

[root@localhost ~]# cat /sys/block/sda/queue/scheduler noop [deadline] cfq

五、查看操作系统版本:

[root@localhost ~]# cat /proc/version

Linux version 3.10.0-1160.el7.x86_64 ([email protected]) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-44) (GCC) ) #1 SMP Mon Oct 19 16:18:59 UTC 2020

查看当前操作系统内核信息:

[root@localhost ~]# uname -a

Linux localhost 3.10.0-1160.el7.x86_64 #1 SMP Mon Oct 19 16:18:59 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

查看操作系统发行信息:

[root@localhost ~]# cat /etc/centos-release CentOS Linux release 7.9.2009 (Core)

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