+\newcommand{\sysctlrelfile}[2]{%
+\texttt{#2}%
+%\index{file!file di controllo (sotto \texttt{/proc/sys})!{#1/#2}@{{\tt {#1/#2}}}}\texttt{#2}%
+} % /proc/sys file name
+
+\newcommand{\sysctlrelfiled}[2]{%
+\index{file!file di controllo (sotto \texttt{/proc/sys})!{#1/#2}@{{\tt {#1/#2}}}}\texttt{#2}%
+} % /proc/sys file name
+
+\newcommand{\kstruct}[1]{%
+\texttt{#1}%
+%\index{struttura dati del kernel!{#1}@{{\tt {#1}}}}\texttt{#1}%
+} % struttura dati del kernel
+\newcommand{\kstructd}[1]{%
+\index{struttura dati del kernel!{#1}@{{\tt {#1}}}}\texttt{#1}%
+%\index{struttura dati del kernel!{#1}@{{\tt {#1}}}!definizione di}\texttt{#1}%
+} % struttura dati
+
+\newcommand{\typed}[1]{%
+\index{tipo di dato!{#1}@{{\tt {#1}}}}\texttt{#1}%
+%\index{#1@{{\tt {#1}} (tipo)}}\texttt{#1}%
+} % system type