Lots of simple shell functionality is provided as builtins. See the bash manual for a list of builtins inherited from the Bourne Shell[1] and that are bash-spec

Lots of simple shell functionality is provided as builtins. See the bash manual for a list of builtins inherited from the Bourne Shell[1] and that are bash-specific[2]. Note that some of these are part of the POSIX standard, so there's not a huge amount of variance allowed between shells which are being compliant. Obviously, PowerShell doesn't adhere to this. [1] https://www.gnu.org/software/bash/manual/html_node/Bourne-Shell-Builtins.html#Bourne-Shell-Builtins https://www.gnu.org/software/bash/manual/html_node/Bourne-Sh... [2]: https://www.gnu.org/software/bash/manual/html_node/Bash-Builtins.html#Bash-Builtins https://www.gnu.org/software/bash/manual/html_node/Bash-Buil...