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> does not append, > overwrites. So, for each file, overwrite the temp file, then overwrite the original.

If you have GNU sed, you can sed -i to edit in-place instead of cat-ing the new file atop...

perl -i.bak -pe 's/this/that/g' <list of file names>
Remove the .bak files after verifying that the substitutions have been done properly.

Note : This will change the inode numbers of all the...

find . -name "*.aif" -exec ls -l {} \; | awk ' { s+=$5 } END { printf "%d bytes\n", s } '

Try:find . -name "*.aif" -ls | awk '{s+=$7}END{print s/(1024*1024)" Mbytes"}'

This will create, for example, "file.txt alias" in current directory from /path/to/file.txt, etc

find -name 'some exp' -type f -exec bash -c 'ln -s $1 "${1##*/} alias"' _ {} \;