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lang-bash
~/.zshrcas it gets sourced, so when the alias gets redefined during that, the$@in the alias expands to the directory. So the second time the alias does havecd <whatever-path>, and it works.~/.zshrc? Opening a new terminal will source it anyway, so why would there be an issue if you source it manually?ls() { command ls "$@" | less }; alias ls='ls -AF'into your.zshrcfile, restart your shell, thensource ~/.zshrc. Now you get an errorzsh: defining function based on alias 'ls'. And that's only a fairly innocuous example. Things can get much more hairy than that, especially when your.zshrcin turn sources 3rd-party files.~/.bashrcand then sourcing it for many years and have never once encountered a problem. Maybe I have been lucky, but it seems more likely that what you are describing isn't a very common problem. Or perhaps it is special to zsh? Come teach me here: Is there any reason to avoid sourcing the shell's configuration file?