I've never tried in Linux. Google says hardinfo or I-Nex.

chkrootkit seems to create many false positives. I wouldn't worry about it. You can post on the chkrootkit mailing list if you are concerned.

In a terminal. Do

Thanks again for the information! I downloaded I-Nex and i am going to install it soon to test it as i have not found many tools to see the hardware things in linux...
I did write that command in the terminal and here is a result... Can someone tell me what type of memory i have i quess it's ddr sdram but i'm not sure. Well i'm not quite a genius lolz...

# dmidecode 2.11
SMBIOS 2.3 present.

Handle 0x003A, DMI type 17, 27 bytes
Memory Device
Array Handle: 0x0038
Error Information Handle: 0x0037
Total Width: 64 bits
Data Width: 64 bits
Size: 512 MB
Form Factor: DIMM
Set: None
Locator: J6G1
Bank Locator: DIMM0
Type: DDR
Type Detail: Synchronous
Speed: 266 MHz
Manufacturer: Manufacturer1
Serial Number: SerNum1
Asset Tag: AssetTagNum1
Part Number: PartNum1

Handle 0x003C, DMI type 17, 27 bytes
Memory Device
Array Handle: 0x0038
Error Information Handle: 0x0037
Total Width: 64 bits
Data Width: 64 bits
Size: 512 MB
Form Factor: DIMM
Set: None
Locator: J6G2
Bank Locator: DIMM1
Type: DDR
Type Detail: Synchronous
Speed: 266 MHz
Manufacturer: Manufacturer2
Serial Number: SerNum2
Asset Tag: AssetTagNum2
Part Number: PartNum2

Does that mean that i have two 512 mb memory sticks in my computer? And should i maybe buy two 1 gb sticks?

Yeah, you probably have 2 sticks. You can always open the back port and look at it. It's pretty tough just looking at it(http://en.wikipedia.org/wiki/DDR_SDRAM). Just make sure the little bump fits the notch. You don't have to buy 2. You can put just put 1GB in plus your 512MB. That should work on most computers.
You can find on ebay or craigslist for a couple of bucks(although I guess you are not in the US). I found 3 free laptops over the last 2 months. Have not even looked at what hardware it has yet.

Today i dusted the computer and great clouds of dust left out of it so it's clean now. Maybe the graphics are working better now and the computer makes a little less noise. There is two memory slots inside the computer both 512 mb ddr and their speed should be 366 at least that read on the sticks but then again the test shows their speed being 266. I wonder if theres some bios memory setting or something that is configured wrong. Yeah i am from finland.

This is what the graphics sometimes do... When using firefox...