To list the files that is larger than 300M bytes (and do the follow up actions, like delete or compress).

     Unix>  find . -size +300M -exec /bin/ls -l {} \;

To list encounter temporary files with prefix “.ri” and you can also directly delete it with safe.

     Unix>  find . -name ".ri*" -exec /bin/ls -l {} \;          # list

     Unix>  find . -name ".ri*" -exec /bin/rm {} \;          #deletion