Rename file to lowercase
cd folder
for f in *; do mv "$f" "$f.tmp"; mv "$f.tmp" "`echo $f | tr "[:upper:]" "[:lower:]"`"; done
Rename space to dash
cd folder
for i in *;do mv "$i" "${i// /-}";done
Bluk rename file with command-line
Rename file to lowercase
cd folder
for f in *; do mv "$f" "$f.tmp"; mv "$f.tmp" "`echo $f | tr "[:upper:]" "[:lower:]"`"; done
Rename space to dash
cd folder
for i in *;do mv "$i" "${i// /-}";done