There are some tools to learn about your Linux system, list devices, get benchmark. But most are not that great, or not that usable, or hard to install or some combination of that. "Hardinfo" is easy to install and use, both command-line and GUI

Software:

Hardinfo
Ubuntu 9.10

Should also work for:

Any Unix

1

Get it

apt-get install hardinfo

 
Also can be downloaded under http://wiki.hardinfo.org/Downloads

2

GUI version of Hardinfo

Nothing to say here. Just start hardinfo. Great overview.

3

From command-line terminal

Following will get you the html report which you can open later in any browser: hardinfo -r -f html > report.html

 
Here is a help output of hardinfo:

diuw@diuw-desktop:~/Desktop# hardinfo --help
Usage:
  hardinfo [OPTION...] - System Profiler and Benchmark tool
 
Help Options:
  -h, --help Show help options
 
Application Options:
  -r, --generate-report creates a report and prints to standard output
  -f, --report-format chooses a report format (text, html)
  -l, --list-modules lists modules
  -m, --load-module specify module to load
  -a, --autoload-deps automatically load module dependencies
  -v, --version shows program version and quit

REMARK: depending Unix distro, packages installed and version of hardinfo, the report you get will be different.

Have fun!