I currently run redhat 8.0 on my celeron 333 pc, i have a single 64 MB SD RAM, i've heard that upgrading the ram can result in disastrous effects on the Linux Machine, is it so? Because i'm planing on adding another 64 MB ram,
pls help

Nope, won't matter a bit. Nothing in how a distro configures things will limit or get confused about a sudden doubling of RAM. Your swap partition will be a little small, but the 2 to 1 rule is really just a rule of thumb. On the machine I'm typing on, I've gone from 256Mb to 768 in two jumps, it doesn't care... on my server I went from 128 starting to 640 in two increments, both have abysmally small swap spaces around 1/2 a gig and 256 respectively...

If you ever go above 960Mb though, you'll have to recompile the kernel to handle, and no kidding, this is called: bigmemory, but even if you don't, it just ignores the excess...

Cheers,

Finegan

If speed improvements are disaterous yes :}
The only troulbes you might face are motherboard/chipset related.

Cheers,
Tink

yes even i thought the same but it seems that my friend tried the same,but in his case he removed the 64MB he had and then installed a newer 256 MB RAM, when he booted up a bunch of errors were displayed, and he had no option but to re-install

Sounds like hardware incompatibility or bad RAM. I went through a couple dozen kernel panics once trying to diagnose a bad 128 stick that was actually fine, my motherboard just hated it for some reason.

Cheers,

Finegan

I've gone from 256MB to 512MB without an issue on a couple of Red Hat 7.1 boxes at work.

I think for some older machines, you need to pass options in either lilo (MEM=xx) or grub for it see memory above 64MB.

If, during boot, your BIOS see's the correct amount (all that is installed) of RAM and passes the memory check, it should work fine in Linux (even Windoze).