Always run "dmesg" with sudo

The dmesg command allows you to review the messages that are stored in the
ring buffer. Some Linux distributions have strict requirements for
dmesg, and you need to use sudo to use dmesg.

Author: jserv

lkmpg.tex

@@ -412,7 +412,7 @@ \subsection{Passing Command Line Arguments to a Module}
 I would recommend playing around with this code:
 \begin{verbatim}
 $ sudo insmod hello-5.ko mystring="bebop" myintarray=-1
-$ dmesg -t | tail -7
+$ sudo dmesg -t | tail -7
 myshort is a short integer: 1
 myint is an integer: 420
 mylong is a long integer: 9999
@@ -422,11 +422,11 @@ \subsection{Passing Command Line Arguments to a Module}
 got 1 arguments for myintarray.
 
 $ sudo rmmod hello-5
-$ dmesg -t | tail -1
+$ sudo dmesg -t | tail -1
 Goodbye, world 5
 
 $ sudo insmod hello-5.ko mystring="supercalifragilisticexpialidocious" myintarray=-1,-1
-$ dmesg -t | tail -7
+$ sudo dmesg -t | tail -7
 myshort is a short integer: 1
 myint is an integer: 420
 mylong is a long integer: 9999
@@ -436,7 +436,7 @@ \subsection{Passing Command Line Arguments to a Module}
 got 2 arguments for myintarray.
 
 $ sudo rmmod hello-5
-$ dmesg -t | tail -1
+$ sudo dmesg -t | tail -1
 Goodbye, world 5
 
 $ sudo insmod hello-5.ko mylong=hello
@@ -1684,12 +1684,11 @@ \subsection{Hash functions}
 
 \samplec{examples/cryptosha256.c}
 
-Make and install the module:
+Install the module:
 
 \begin{codebash}
-make
 sudo insmod cryptosha256.ko
-dmesg
+sudo dmesg
 \end{codebash}
 
 And you should see that the hash was calculated for the test string.