command - run a program

概要

command [OPTIONS] [COMMANDNAME [ARG ...]]

描述

command forces the shell to execute the program COMMANDNAME and ignore any functions or builtins with the same name.

In command foo, command is a keyword.

The following options are available:

-a or --all

Prints all COMMAND found in PATH, in the order found.

-q or --query

Return 0 if any of the given commands could be found, 127 otherwise. Don't print anything. For compatibility, this is also --quiet (deprecated).

-s or --search (or -v)

Prints the external command that would be executed, or prints nothing if no file with the specified name could be found in PATH.

-h or --help

顯示此指令的幫助資訊。

範例

command ls 為執行 ls 程式，即使同時存在名為 ls 的函式。

command -s ls 會印出 ls 程式的路徑。

command -q git; and command git log 只有在 git 存在時才會執行 git log。

command -sq git and command -q git and command -vq git return true (0) if a git command could be found and don't print anything.