type, will help you know if a command, is an alias, a built-in command or an independed command installed in your PC.
With no options, describe a command, for each name, indicate how it would be interpreted if used as a command name. SYNTAX
type [-atp] [name ...]
If the -t option is used, type prints a string which is one of alias, keyword, function, builtin, or file if name is an alias, shell reserved word, function, builtin, or disk file, respectively.
`alias' (shell alias) `function' (shell function) `builtin' (shell builtin) `file' (disk file) `keyword' (shell reserved word)
-p' option is used, type either returns the name of the disk file that would be executed, or nothing if -t’ would not return `file’.
-a' option is used, type returns all of the places that contain an executable named file. This includes aliases and functions, if and only if the -p’ option is not also used.
The return status is zero if any of the names are found, non-zero otherwise.
And you will see that type is a bash built-in command.
type is a shell builtin