Recursively remove files

change to the directory, and use:

find . -name ".DS_Store" -print0 | xargs -0 rm -rf
find . -name "._*" -print0 | xargs -0 rm -rf

Not tested, try them without the xargs first!

You could replace the period after find, with the directory, instead of changing to the directory first.

find /dir/here ...

find /var/www/html \( -name '.DS_Store' -or -name '._*' \) -delete

cd /var/www/html && find . -name '.DS_Store' -print0 | xargs -0 rm
cd /var/www/html && find . -name '._*' -print0 | xargs -0 rm

You could switch to zsh instead of bash. This lets you use ** to match files anywhere in a directory tree:

$ rm /var/www/html/**/_* /var/www/html/**/.DS_Store

You can also combine them like this:

$ rm /var/www/html/**/(_*|.DS_Store)

Zsh has lots of other features that bash lacks, but that one alone is worth making the switch for. It is available in most (probably all) linux distros, as well as cygwin and OS X.

You can find more information on the zsh site.

find . -name "FILE-TO-FIND"-exec rm -rf {} \;

if you have Bash 4.0++

#!/bin/bash
shopt -s globstar
for file in /var/www/html/**/.DS_Store /var/www/html/**/._ 
do
 echo rm "$file"
done