The other day I entreteniéndome with Gentoo in a VM. Right in the beginning the installation guide presents some interesting commands that I know and are available in Ubuntu. They are for terminal, so you have to open one by pressing CTRL + ALT + T.

To understand the performance of the CPU

grep bogo /proc/cpuinfo
When booting the Linux kernel is estimated CPU performance. The unit used is the bogomips .

To find out the hard drive performance

sudo hdparm -tT /dev/sda
This command causes a speed test the hard drive and shows the result.

To find the memory installed in the system

grep MemTotal /proc/meminfo
This filters the information we file virtual memory meninfo, which contains more information on the use of memory by the kernel.

This information is important in Gentoo because we can appreciate what it take to install the programs as they need to be compiled to be installed.

Gentoo Installation Guide.