[Dreftas]

How much resources PC need to have for:
~100 Online people
MySQL
Linux Debian/Ubuntu/CentOS

How much RAM, CPU speed, Bandwish per month ?

[RoBo]

Depends on your mode. As a guess, 4mb/s upload, 50mb RAM and any CPU made in the past few years.

[Correlli]

This was asked many times.
http://forum.sa-mp.com/index.php?topic=102689.0