How to change filenames to lowercase?

Question

I need to change all names of all files in specific directory to lowercases, using bash script. Moreover I don't want to change names of subdirectories, as it was proposed in How to rename all folders and files to lowercase on Linux?

score 4 · Accepted Answer · answered Jan 14 '14 at 17:10

4

for file in *; do
    [[ -f "$file" ]] && mv "$file" "${file,,}" 2>/dev/null
done

I'm not sure what version of bash introduced the ${var,,} expansion.

answered Jan 14 '14 at 17:10

glenn jackman

223,850
36
205
328

1

The [release notes](http://tiswww.case.edu/php/chet/bash/NEWS) have it as item hh for version 4.0. – chepner Jan 14 '14 at 17:36

score 3 · Answer 2 · answered Jan 14 '14 at 17:06

3

Try this:

for file in * ; do lower=$(echo $file | tr A-Z a-z) && [[ $lower != $file ]] && echo mv $file $lower ;done

It will echo the commands you need to run. Check them first, then you can remove the echo and run it again to do the actual moves

answered Jan 14 '14 at 17:06

Jakub Kotowski

7,121
26
38

score 0 · Answer 3 · edited May 23 '17 at 11:47

0

Try the following:

for i in $(find . -maxdepth 1 -type f -name "*[A-Z]*"); do mv "$i" "$(echo $i | tr A-Z a-z)"; done

[1] refer

edited May 23 '17 at 11:47

Community

1
1

answered Jan 14 '14 at 17:10

Mitesh Pathak

1,306
10
14

2

This is not a safe way to iterate over files: if you find a filename with a space, the for loop will not treat it as a single word. – glenn jackman Jan 14 '14 at 17:13
yep... thanks mate for pointing that out. – Mitesh Pathak Jan 14 '14 at 17:27

How to change filenames to lowercase?

3 Answers3