find files newer than [filename] and copy them to [dirname]

find-copy-change

 find . -type f -newer '[filename]' -print0 | xargs -0 -I {} cp {} [dirname]
 
 # replace strings in a file without creating a backup.  the -i parameter would create a backup if you so desired
 sed -i '' 's/techliminal/localhost/g' [filename]
 
 # find all the javascript files and list them
 find . -name *.js -print | xargs ls -l
 
 # change the owner of all the javascript files 
 # Looks like the sudo has to be on the xargs / chown part of the operation
 find . -name *.js -print | sudo xargs chown anca:www-data