Linux - Best diagnostic Tool

Here are some important Linux diagnostic tool:

1) Memtest86

http://www.memtest86.com/

2) S.M.A.R.T. Monitoring Tools

http://smartmontools.sourceforge.net/

3) Temperature Sensor:

http://lm-sensors.org/

[from http://www.html.it/articoli/linux-i-migliori-tool-per-la-diagnostica-3/]