Linux Rename files with Prefix
To rename all .jpg to prefix*.jpg in the current directory:
In a shell script
for filename in *.jpg; do mv "$filename" "prefix_$filename"; done;
You can use rename utility to rename multiple files by a pattern. For example following command will prepend string MyVacation2011_ to all the files with jpg extension.
rename 's/^/MyVacation2011_/g' *.jpg
or
rename <pattern> <replacement> <file-list>
rename 2018-10-03 3 *.mp3