There are programs relying on this file like Oh My Zsh installer:
~ $ sh -c "$(curl -fsSL https://raw.github.com/robbyrussell/oh-my-zsh/master/tools/install.sh)" grep: /etc/shells: No such file or directory Zsh is not installed! Please install zsh first! ~ $ sudo eopkg it zsh The following package(s) are already installed and are not going to be installed again: zsh No packages to install.
It should contain path to every installed shell.