ren is a command-line utility that takes find-formatted lines via standard input, and batch renames them. By default, it outputs a diff-preview of the renamed files and directories to standard output, and with a flag it can rename the files and directories.

Output a diff to standard output showing the result of finding all the files containing foo in their name, and replacing foo to bar in their names:

find . -name '*foo*' | ren foo bar

Add the -w (--write) flag to rename the files:

find . -name '*foo*' | ren foo bar

ren is available via cargo:

cargo install ren-find

The default pager is less, the REN_PAGER environment variable can be used to override the pager (e.g., export REN_PAGER=delta in Bash).

ren -h (or ren --help, the full --help provides slightly longer explanations of some option) will list help for all the command-line flags.

• Much of the functionality, and the overall structure of the source code, was borrowed sd. ren began as a fork of sd.
• The code for specifying a custom pager for ren was borrowed from delta.