Could I please get some recommendations of a linux live cd for low memory?
DSL (Damned Small Linux) and Knoppix are both used in the context of smaller memory footprint machines booting from CD or USB drive.
There is also tiny core linux, a kind of busybox. But since you gave us very few specifics to go on those are what might be helpful for you.
Damn Small Linux, Download the ISO
Downloads Tiny Core Linux
KNOPPIX Download
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