It looks like the listed minimum for RHEL 6 was 1gb[1]. I don't think 128 was officially supported even then, so if you're happy with how it works now, you may still be happy with 7.
Probably. You'll have to hack the install procedure to enable swapping before it's being run though.
If you're serious about trying this, the fastest path is to install CentOS in a VM on a suitable machine that isn't going to spend a day in the installer swapping like crazy, and copy the image to a physical drive which you eventually stuff into the ancient low memory box.
> I've been happily using CentOS 6 on my 128MB box
I used to do that too, but then I figured there's a constructive use I could give to my old desktops when any such system reaches the age of replacement - just max it out on RAM and declare it a "home server". Now I can run a Minecraft node for my kids on it - with 2GB of Java heap, no less.
I mean, my Raspberry Pi has more than 128 MB of RAM.
Oh, RAM sticks are cheap, esp. for old machines. This is true. But I use a VPS, and the 128MB instances are cheap enough to be worth taking ten minutes to shut off junk services (which improves security anyway).
Out of interest, what machine are you using CentOS 6 on? I find 128mb kinda tight - although I've recently found a VPS provider who's managed to get Debian Jessie working in 96!
Granted it is an Enterprise level distro with iscsi, storage drivers, xfs as default, other relatively heavy things in it included by default. Running on smaller machines was never a goal, if it did, it was probably accidental.
I don't even know if they have an ARM port (maybe an ARM 64bit for those new hip low wattage ARM microservers).
