Here's a zsh command that renames all files in the current working directory from kebab case to snake case:
 
for f in *; do mv "$f" "$(echo $f | sed 's/-/_/g')"; done

This command uses a for loop to iterate over each file in the directory, and then uses the sed command to replace all occurrences of hyphens (-) with underscores (_) in the file names.

To run this command, you don't need to install any additional packages, as both zsh and sed should already be included in a standard Arch Linux installation. However, if you encounter any issues, you can install them using the following commands:

 
sudo pacman -S zsh
sudo pacman -S sed
These commands will install zsh and sed on your Arch Linux system.
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