I am going to try some Linux live CDs made by individuals. I want to make sure that it doesn't contain malware. How do I do it?
I am going to try some linux live CDs made by individuals, I want to make sure that it's not malware contained, how do I do it?
You can't. You're running arbitrary software on your machine; it could do anything at all, and there's simply no way to check for that in advance. They intentionally have the ability to overwrite your hard drive, for example, because that's the fundamental point of them. If you don't trust the source, don't trust the disc.
If you want to try them out (reasonably) safely, you can use a virtual machine such as VirtualBox or VMWare, which will isolate the running code from your real machine. There are several questions here and on SuperUser about setting those up.