How to check hardware information under Linux

##lshw

lshw This command is a relatively

generaltool that can be used in detail Listhardware informationof this machine. But this command is not available in all distributions. For example, Fedora does not have it by default and you need to install it yourself.

lshw can extract hardware information from each /proc file, such as:

CPU, memory, usb controller, hard disk, etc. Without options, the information listed will be very long. With the-shortoption, onlysummary informationwill be listed.

[alvin@VM_0_16_centos ~]$ sudo lshw -short #篇幅关系，以下结果有删减 H/W path Device Class Description ========================================================== system Bochs /0 bus Motherboard /0/0 memory 96KiB BIOS /0/401 processor Intel(R) Xeon(R) CPU E5-26xx v4 /0/1000 memory 2GiB System Memory /0/1000/0 memory 2GiB DIMM RAM /0/100 bridge 440FX - 82441FX PMC [Natoma] /0/100/1 bridge 82371SB PIIX3 ISA [Natoma/Triton II] /0/100/1.1/0.1.0 /dev/cdrom disk QEMU DVD-ROM /0/100/1.2/1 usb1 bus UHCI Host Controller /0/100/1.3 bridge 82371AB/EB/MB PIIX4 ACPI /0/100/4/0/1 /dev/vda1 volume 49GiB EXT3 volume /0/100/5 generic Virtio memory balloon /0/100/5/0 generic Virtual I/O device /0/1 system PnP device PNP0b00 /0/2 input PnP device PNP0303

lscpu

lscpu can list the

CPUrelated information of this machine. This command does not have any options or parameters.

[alvin@VM_0_16_centos ~]$ 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: GenuineIntel CPU family: 6 Model: 79 Model name: Intel(R) Xeon(R) CPU E5-26xx v4 Stepping: 1 CPU MHz: 2399.988 BogoMIPS: 4799.97 Hypervisor vendor: KVM Virtualization type: full L1d cache: 32K L1i cache: 32K L2 cache: 4096K NUMA node0 CPU(s): 0

lsusb

lsusb Lists the information of all

USBdevices connected to this machine. By default, only summary information is listed. Use the-voption to list detailed information for eachUSBport.

[alvin@VM_0_16_centos ~]$ lsusb Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp. SMSC9512/9514 Fast Ethernet Adapter Bus 001 Device 002: ID 0424:9514 Standard Microsystems Corp. SMC9514 Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

lsscsi

lsscsi can list device information such as

hard disk/optical drive, etc.SCSI/SATA.

[alvin@VM_0_16_centos ~]$ lsscsi [0:0:1:0] cd/dvd QEMU QEMU DVD-ROM 1.2. /dev/sr0

lspci

lspci Lists all

PCIbuses and detailed information of all devices connected to the PCI bus, such asVGA adapters, graphics cards, network adapters , usb port, SATA controller, etc.

[alvin@VM_0_16_centos ~]$ lspci 00:00.0 Host bridge: Intel Corporation 440FX - 82441FX PMC [Natoma] (rev 02) 00:01.0 ISA bridge: Intel Corporation 82371SB PIIX3 ISA [Natoma/Triton II] 00:01.1 IDE interface: Intel Corporation 82371SB PIIX3 IDE [Natoma/Triton II] 00:01.2 USB controller: Intel Corporation 82371SB PIIX3 USB [Natoma/Triton II] (rev 01) 00:01.3 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ACPI (rev 03) 00:02.0 VGA compatible controller: Cirrus Logic GD 5446 00:03.0 Ethernet controller: Red Hat, Inc Virtio network device 00:04.0 SCSI storage controller: Red Hat, Inc Virtio block device 00:05.0 Unclassified device [00ff]: Red Hat, Inc Virtio memory balloon

df

df command can list the size of different partitions,

usage, usage, mount pointand other information, plus-hThe option can express the size in units such as k, M, G, etc. Otherwise, the default isbytes, which is not easy to read.

[alvin@VM_0_16_centos ~]$ df -h Filesystem Size Used Avail Use% Mounted on /dev/vda1 50G 7.5G 40G 16% / devtmpfs 911M 0 911M 0% /dev tmpfs 920M 68K 920M 1% /dev/shm tmpfs 920M 364K 920M 1% /run tmpfs 920M 0 920M 0% /sys/fs/cgroup tmpfs 184M 0 184M 0% /run/user/0 tmpfs 184M 0 184M 0% /run/user/1001 tmpfs 184M 0 184M 0% /run/user/1000

free

The free command can view the

used, idle and overall amount of RAMin the system, usually with the-mparameter.

[alvin@VM_0_16_centos ~]$ free -m total used free shared buff/cache available Mem: 1839 221 156 0 1461 1400 Swap: 0 0 0

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