How do I identify builtins?

To identify builtins in a shell, you can use the following methods:

1. Help Command:

   • Most shells provide a help command that lists builtins. For example, in bash, you can type:

     help

   • This will display a list of all builtin commands along with a brief description of each.

2. Man Pages:

   • You can check the manual pages for the shell you are using. For example, in bash, you can view the manual for builtins by typing:

     man bash

   • Look for the section titled "SHELL BUILTIN COMMANDS" for a comprehensive list.

3. Command Type:

   • You can use the type command to check if a command is a builtin. For example:

     type cd

   • If the command is a builtin, it will indicate that it is a shell builtin.

4. Built-in Command List:

   • Some shells have specific commands to list builtins. For example, in zsh, you can use:

     builtin

   • This will display a list of all builtins available in that shell.

Using these methods, you can easily identify which commands are builtins in your shell environment.