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exec	Built-in command

Arguments:

• _is_verbose={ 0:No | 1:Yes },"command"

Description:

Execute external command using a system call.

The status value is then set to the error code returned by the system call.
If is_verbose=1, the executed command is allowed to output on stdout/stderr.

(equivalent to shortcut command x).

Default values:

is_verbose=1.