OT: GDB + rootkit question

[Botond Kardos]

    Hi,
    since I heard that there are some newer rootkits which won't be
detected by chkrootkit I'd like to check the running kernels symbol
table against the compiled System.map. Is there a somewhat more detailed
HOW-TO for doing this? The how-to's I've found by Googling usually only
mention that I shall compare the tables with GDB. Can somebody tell me
what exactly shall be done in GDB? (Because I haven't used it yet
before.)
    Thanks,
    Botond

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