shell - bash rename files issue? -

i know nothing linux commands o bash scripts me please. have lot of file in different directories want rename files "name" "name.xml" using bash file possible that? find usefulness codes on internet this:

shopt -s globstar # enable ** globstar/recursivity in **/*.txt; echo "$i" "${i/%.txt}.xml"; done 

it not work.

explanation

move/rename files –whatever extension is– in current directory , below name name.xml. should test using echo before running real script.

shopt -s globstar # enable ** globstar/recursivity in **; # **/*.txt .txt files     [[ -d "$i" ]] && continue # skip directories     echo "$i" "$i.xml"; # replace 'echo' 'mv' when validated     #echo "$i" "${i/%.txt}.xml"; # replace .txt .xml done