rename 's/[regex]/[replace]/' *print changes, dont actually rename
rename -n 's/[regex]/[replace]/' *
rename -n 's/(.*)/$1/' *append .txt extension
rename -n 's/(.*)/$1.txt/' *examplesremove leading whitespace from file (or dir) names
rename -n 's/^ *//' *remove trailing whitespace from file (or dir) names
rename -n 's/ *$//' *