command - Treats command arguments as simple commands
command [-p] command_name [argument...]
command [-v|-V] command_name
command causes the shell to treat the
as simple commands, and suppresses
the default shell function lookup.
Interfaces documented on this reference page conform to industry standards as follows:
command: XPG4, XPG4-UNIX
Refer to the
reference page for more information
about industry standards and associated tags.
Performs the command search using a default value for
that is guaranteed to find all of the
Writes a string to standard output that indicates the path
name or command to be used by the shell in the current shell execution environment
Writes a string to standard output that indicates how the
name given in the
operand will be
interpreted by the shell in the current shell execution environment.
The command command allows you to run the following commands: User-defined commands whose names correspond to shell built-in commands. System commands whose names correspond to shell built-in commands.
argument specifies the name
of a utility. The one or more optional arguments to
specify strings treated as arguments to the specified utility.
It also provides information concerning how a command name will be interpreted
by the shell.
is not the name
of a function, the effect of
is the same as would
be obtained by specifying
Since the -v and -V options to command produce output in relation to the current shell execution environment, if command is called in a subshell or separate utility execution environment, it may not produce correct results. The following are examples of this type of operation:
(PATH=foo command -v) nohup command -v
When the -v or -V options are specified, command returns one of the following values. Successful completion. The command_name could not be found, or an error occurred.
If the -v or -V options are not specified, command returns one of the following values on error. The utility specified by command_name was found but could not be invoked. An error occurred in the command command, or the utility specified by the command_name argument could not be invoked.
If no error occurs, the exit status of
that of the command specified by the arguments to
To ensure execution of the simple command pwd instead of the pwd shell built-in command, enter the following: command -p pwd
The preceding command displays the full path name of the current directory,
and does not perpetuate a view of the current directory location created by
links as the shell built-in command might do.
The following environment variables affect the execution of
Provides a default value for the internationalization variables
that are unset or null. If
is unset or null, the corresponding value from the default locale is used.
If any of the internationalization variables contains an invalid setting,
the utility behaves as if none of the variables had been defined.
If set to a non-empty string value, overrides the values of
all the other internationalization variables.
Determines the locale for the interpretation of sequences
of bytes of text data as characters (for example, single-byte as opposed to
multibyte characters in arguments).
Determines the locale that should be used to affect the format
and contents of diagnostic messages written to standard error.
Determines the location of message catalogues for the processing
Determines the search path used during the command search
option is specified.
Commands: env(1), hash(1), type(1)