grep in action 
example:
 ls -alR | grep -v bak | grep -v gz | grep -v log.Z | grep -v .tar | grep -v bak.Z | tee  ~/listing.txt

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to extract ONLY pertinent (imo) data from a listing of mulitple
files... (directories all had a 0 in them, wanted to eliminate the . and ..
directories (although I could have done that using ls -Al), links, lost+found
and the "total" info...)

ls -al *0* | grep -v total | grep -v lrwxr | grep -v lost | grep -v '\.' | more

this could also have been piped to a file, replace more with:  | tee -a /tmp/filelist

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ok, so now I want to just show the first field and the ninth field,
but ONLY when the first field is NOT drwx:

cat /tmp/filelist | awk '{if ($1 ~ /^drwx/ ){ print $1 "  "$9}}' | tee -a /tmp/list

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