# ralf : Rename A Lot of Files
ralf is a tiny command line tool to rename a lot of files.
Use regex to match a pattern you want to change and set the replacement.
## Install
run make
## Usage
Pass files to rename as argument to ralf.
Usually, you can glob all files in the current directory.
```
> ralf *
```
## Example
```
> ralf *
a
aaaaa
b
bar
c
foo
xxxx
---
Pattern to replace: [a-c]
with: z
---
a -> z
aaaaa -> zzzzz
b -> z
bar -> zzr
c -> z
foo -> foo
xxxx -> xxxx
---
OK? (Return, or ctrl-c to cancel)
a -> z
aaaaa -> zzzzz
ralf: z already exist, b is left unchanged
bar -> zzr
ralf: z already exist, c is left unchanged
bye o/
```
## See also
re_format(7)