diff --git a/chapter06/acl.xml b/chapter06/acl.xml
index 60abb39f3..267160cf7 100644
--- a/chapter06/acl.xml
+++ b/chapter06/acl.xml
@@ -64,7 +64,7 @@
     <para>Install the package:</para>
 
 <screen><userinput remap="install">make install install-dev install-lib
-chmod -v 0755 /usr/lib/libacl.so</userinput></screen>
+chmod -v 755 /usr/lib/libacl.so</userinput></screen>
 
     <para>The shared library needs to be moved to
     <filename class="directory">/lib</filename>, and as a result the
diff --git a/chapter06/attr.xml b/chapter06/attr.xml
index 07a80a0e0..572f7635e 100644
--- a/chapter06/attr.xml
+++ b/chapter06/attr.xml
@@ -68,7 +68,7 @@
     <para>Install the package:</para>
 
 <screen><userinput remap="install">make install install-dev install-lib
-chmod -v 0755 /usr/lib/libattr.so</userinput></screen>
+chmod -v 755 /usr/lib/libattr.so</userinput></screen>
 
     <para>The shared library needs to be moved to
     <filename class="directory">/lib</filename>, and as a result the
diff --git a/chapter06/libcap.xml b/chapter06/libcap.xml
index 43f842fe8..df04bc761 100644
--- a/chapter06/libcap.xml
+++ b/chapter06/libcap.xml
@@ -52,7 +52,7 @@
     <para>Install the package:</para>
 
 <screen><userinput remap="install">make RAISE_SETFCAP=no prefix=/usr install
-chmod -v 0755 /usr/lib/libcap.so.2.22</userinput></screen>
+chmod -v 755 /usr/lib/libcap.so</userinput></screen>
 
     <para>The shared library needs to be moved to
     <filename class="directory">/lib</filename>, and as a result the