Remove backup files recursively (bash/sh):

find ./ -name '*~' -exec rm '{}' \; -print

Rip CD to one wav file:

cdparanoia -w

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Rip CD, one track/wav file:

cdparanoia -w -B

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YUM update one set of files. (This pulls all rpms that begin with SDL, I like this example because it whose awk example and xagrs):

yum list updates | awk '/^SDL/ {printf("%s ",$1)}' | xargs yum upgrade -y

Also done with:

yum upgrade SDL*