\newcommand{\cmd}[1]{\texttt{#1}} % shell command
\newcommand{\code}[1]{\texttt{#1}} % for simple code
\newcommand{\func}[1]{%
\newcommand{\cmd}[1]{\texttt{#1}} % shell command
\newcommand{\code}[1]{\texttt{#1}} % for simple code
\newcommand{\func}[1]{%
} % library function (or system call)
\newcommand{\macro}[1]{\texttt{#1}} % macro constant
\newcommand{\var}[1]{\texttt{#1}} % variable
} % library function (or system call)
\newcommand{\macro}[1]{\texttt{#1}} % macro constant
\newcommand{\var}[1]{\texttt{#1}} % variable