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This is a guest post written by SathiyaMoorthy.
lshw (Hardware Lister) command gives a comprehensive report about all hardware in your system. This displays detailed information about manufacturer, serial number of the system, motherboard, CPU, RAM, PCI cards, disks, network card etc.,
Using lshw, you can get information about the hardware without touching a screwdriver to open the server chassis. This is also very helpful when the server is located in a remote data center, where you don’t have physical access to the server.
In our previous article, we discussed about how to display hardware information on linux using dmidecode command. In this article, let us review how to view the hardware specifications using lshw command.
Download the latest version of lshw from Hardware Lister website. Extract the source code to the /usr/src as shown below.
# cd /usr/src # wget http://ezix.org/software/files/lshw-B.02.13.tar.gz # gzip -d lshw-B.02.13.tar.gz # tar xvf lshw-B.02.13.tar
Note: To install the pre-compiled version, download it from Hardware Lister website.
Install lshw as shown below. This will install lshw in the /usr/sbin directory.
# make # make install make -C src install make: Entering directory `/usr/src/lshw-B.02.13/src' make -C core all make: Entering directory `/usr/src/lshw-B.02.13/src/core' make: Nothing to be done for `all'. make: Leaving directory `/usr/src/lshw-B.02.13/src/core' g++ -L./core/ -g -Wl,--as-needed -o lshw lshw.o -llshw -lresolv install -p -d -m 0755 ///usr/sbin install -p -m 0755 lshw ///usr/sbin install -p -d -m 0755 ///usr/share/man/man1 install -p -m 0644 lshw.1 ///usr/share/man/man1 install -p -d -m 0755 ///usr/share/lshw install -p -m 0644 pci.ids usb.ids oui.txt manuf.txt ///usr/share/lshw make: Leaving directory `/usr/src/lshw-B.02.13/src'
lshw Output Layout
When executing lshw without option, you will get detailed information on the hardware configuration of the machine in text format. Following is the structure of lshw output.
system information motherboard information cpu information cache, logical cpu memory capacity, total size, individual bank information pci slot information ide slot information disk information total size, partition, usb slot information network
Following is the partial output of lshw command.
# lshw | head local-host description: Rack Mount Chassis product: PowerEdge 2850 vendor: Dell Computer Corporation serial: 1234567 width: 32 bits capabilities: smbios-2.3 dmi-2.3 smp-1.4 smp configuration: boot=normal chassis=rackmount cpus=2 uuid=12345 *-core description: Motherboard
Note: lshw must be run as root to get a full report. lshw will display partial report with a warning message as shown below when you execute it from a non-root user.
jsmith@local-host ~> /usr/sbin/lshw WARNING: you should run this program as super-user.
To get information about a specific hardware, you can use -class option. Following classes can be used with the -class option in the lshw command.
address bridge bus communication disk display generic input memory multimedia network power printer processor storage system tape volume
Get Information about the Disks using lshw
The example below will display all the information about the disks on the system. This indicates that the /dev/sda is a SCSI Disk, RAID1 configuration with a total capacity of 68G.
# lshw -class disk *-disk description: SCSI Disk product: LD 0 RAID1 69G vendor: MegaRAID physical id: 2.0.0 bus info: scsi@0:2.0.0 logical name: /dev/sda version: 516A size: 68GiB (73GB) capabilities: partitioned partitioned:dos configuration: ansiversion=2 signature=000e1213
Get Information about Physical Memory (RAM) of the System
Please note that only partial output is shown below.
# lshw -class memory *-memory description: System Memory size: 512MB capacity: 2GB *-bank:8 description: DIMM Synchronous [empty] *-bank:9 description: DIMM Synchronous size: 512MB width: 32 bits
Generate Compact Hardware Report Using lshw
By default lshw command generates multi-page detailed report. To generate a compact report use -short option as shown below. Only partial output is shown below.
# lshw -short H/W path Device Class Description ======================================================= system PowerEdge 2850 /0 bus 12345 /0/0 memory 64KiB BIOS /0/400 processor Intel(R) Xeon(TM) CPU 3.40GHz /0/400/700 memory 16KiB L1 cache /0/400/701 memory 1MiB L2 cache /0/400/702 memory L3 cache /0/400/1.1 processor Logical CPU /0/1000 memory 4GiB System Memory /0/1000/0 memory 1GiB DIMM Synchronous 400 MHz (2.5 ns) /0/1000/1 memory 1GiB DIMM Synchronous 400 MHz (2.5 ns) /0/100/6/0/4 eth2 network 82546EB Gigabit Ethernet Controller (Copper) /0/100/6/0/4.1 eth3 network 82546EB Gigabit Ethernet Controller (Copper) /0/100/6/0.2 bridge 6700PXH PCI Express-to-PCI Bridge B /0/100/6/0.2/2 bus Thor LightPulse Fibre Channel Host Adapter /0/100/1e bridge 82801 PCI Bridge /0/100/1e/d display Radeon RV100 QY [Radeon 7000/VE]
Generate HTML or XML Hardware Report Using lshw
You can generate a HTML or XML output from the lshw command directly as shown below.
# lshw -html > hwinfo.html # lshw -xml > hwinfo.xml
This article was written by SathiyaMoorthy, developer of enterprise postgres query analyser, an efficient tool for parsing postgresql log to generate html report, which can be used for fine tuning the postgres settings, and sql queries. The Geek Stuff welcomes your tips and guest articles.
Comments on this entry are closed.
your posting is excellent.
Its always a question in linux how to check the H/w list just like windows
through this we can easily do the same.