a question on ram dump
 

i have a question on how to dump the memory in Fedora. i've downloaded several softwares, such as lkcd, msramdmp. but i have no idea. hope someone can help me. thank you.

Do you want to dump memory for a specific process? First you have to set the coredump size limit:
ulimit -c 4000 (use 4,000 1k blocks for the coredump)
Then run the program and at any time you can send it a "SIGSEGV" or similar signal to cause a core dump.