How to batch rename files of the Bash command line for Linux

How to batch rename files of the Bash command line for Linux

Example:
# find ./ -name oldfile -exec mv .newfile \

or
# find ./ -name oldfile | xargs -I mv .newfile

or
# find ./ -name oldfile | awk 'printf("mv %s \t %s \n",$1,$1)' |sh

How to batch rename files of the Bash command line for Linux