type - Linux command to know how a word will be interpreted
Follow @ggarrontype, 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 ...]
OPTIONS
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)
If the -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'.
If the -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.
Run
type type
And you will see that type is a bash built-in command.
type is a shell builtin