ubuntu linux bash command of the day

export your hardware configuration as a html file:
sudo lshw -html > hardware.html

OUTPUT:

id:	laptop
description:	Notebook
product:	VPCSE2V9E (N/A)
vendor:	Sony Corporation
version:	C60A6XQR
serial:	27553856-5000146
width:	64 bits
capabilities:	smbios-2.6 dmi-2.6 vsyscall32
configuration:	boot = normal chassis = notebook family = VAIO sku = N/A uuid = E029B046-7565-E111-8895-211273E37426

...


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display amount of free and used memory in the system, in gigabytes:
free -g

OUTPUT:

             total       used       free     shared    buffers     cached
Mem:             7          3          4          0          0          1
-/+ buffers/cache:          2          5
Swap:            7          0          7


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