linux？type命令用法实战教程（linuxvi编辑器的用法）学到了

[root@new55 ~]#?type -a type?
type is a shell builtin
[root@new55 ~]#?help type?
type: type [-afptP] name [name …]
? For each NAME, indicate how it would be interpreted if used as a
? command name.
? If the -t option is used, `type’ outputs a single word which is one of
? `alias’, `keyword’, `function’, `builtin’, `file’ or `’, if NAME is an
? alias, shell reserved word, shell function, shell builtin, disk file,
? or unfound, respectively.
? If the -p flag is used, `type’ either returns the name of the disk
? file that would be executed, or nothing if `type -t NAME’ would not
? return `file’.
? If the -a flag is used, `type’ displays all of the places that contain
? an executable named `file’.? This includes aliases, builtins, and
? functions, if and only if the -p flag is not also used.
? The -f flag suppresses shell function lookup.
? The -P flag forces a PATH search for each NAME, even if it is an alias,
? builtin, or function, and returns the name of the disk file that would
? be executed.
typeset: typeset [-afFirtx] [-p] name[=value] …
? Obsolete.? See `declare’.
[root@new55 ~]#