Networking: Remove exercise about www.meineip.de.

[aple.git] / Unix_Concepts.m4

diff --git a/Unix_Concepts.m4 b/Unix_Concepts.m4
index 938befcd3590d3a3cb421f79b4dc566addb44f53..3841c01348f9f75c1844197299a3a920d69ed015 100644 (file)
--- a/Unix_Concepts.m4
+++ b/Unix_Concepts.m4
@@ -202,10 +202,6 @@ EXERCISES()
        <li> Run <code>uname -a</code> on various Unix machines to see the
        OS type and the kernel version. </li>
 
-       <li> Nice read on the
-       <a href="http://www.catb.org/~esr/writings/taoup/html/ch02s01.html">Origins and
-       History of Unix</a>, 1969-1995. </li>
-
        <li> Explore the <a
        href="https://upload.wikimedia.org/wikipedia/commons/7/77/Unix_history-simple.svg">Unix
        time line</a>. </li>
@@ -214,14 +210,6 @@ EXERCISES()
        href="http://www.gnu.org/cgi-bin/license-quiz.cgi">Free Software
        licensing quiz</a>. </li>
 
-       <li> Read the <a
-       href="https://www.newyorker.com/business/currency/the-gnu-manifesto-turns-thirty">
-       notes on the 30th anniversary</a> of the GNU Manifesto. </li>
-
-       <li> Read the <a
-       href="http://www.catb.org/~esr/writings/unix-koans/end-user.html">
-       Koan of Master Foo and the End User</a>. </li>
-
        <li> On a Debian or Ubuntu system, run <code>aptitude search
        python</code> to list all python-related Ubuntu packages. Run
        <code>aptitude show python-biopython</code> to see the description
@@ -796,11 +784,11 @@ as described below. </p>
 
 <table>
        <tr>
-               <td> </td>
-               <td> <em>Directories</em> </td>
-               <td> <em>Non-directories</em> </td>
+               <th> &nbsp;&nbsp; </th>
+               <th> Directories </th>
+               <th> Non-directories </th>
        </tr> <tr>
-               <td> <code>&nbsp;r&nbsp;</code> </td>
+               <th> <code>r</code> </th>
 
                <td> The permission to list the directory contents. More precisely,
                this bit grants the permission to call <code>opendir(3)</code>
@@ -813,7 +801,7 @@ as described below. </p>
                fail for other reasons, though.
 
        </tr> <tr>
-               <td> <code>&nbsp;w&nbsp;</code> </td>
+               <th> <code>w</code> </th>
 
                <td> The permission to add or remove directory entries. That is,
                to create new files or to remove existing files. Note that write
@@ -827,7 +815,7 @@ as described below. </p>
                permissions. </td>
 
        </tr> <tr>
-               <td> <code>&nbsp;x&nbsp;</code> </td>
+               <th> <code>x</code> </th>
 
                <td> The permission to <em>search</em> the directory. Searching
                a directory means to access its entries, either by retrieving
@@ -858,9 +846,9 @@ three digits. </p>
 
 <table>
        <tr>
-               <td> octal value </td>
-               <td> symbolic representation </td>
-               <td> meaning </td>
+               <th> Octal Value </th>
+               <th> Symbolic Representation </th>
+               <th> Meaning </th>
        </tr> <tr>
                <td> 0 </td>
                <td> <code>---</code> </td>
@@ -2514,6 +2502,18 @@ SUBSECTION(«symlink_madness»)
 
 SECTION(«Further Reading»)
 <ul>
+       <li> <a
+       href="http://www.catb.org/~esr/writings/taoup/html/ch02s01.html">Origins
+       and History of Unix, 1969-1995</a> by Eric Steven Raymond. </li>
+
+       <li> <a
+       href="https://www.newyorker.com/business/currency/the-gnu-manifesto-turns-thirty">
+       The GNU Manifesto Turns Thirty</a>, by Maria Bustillos. </li>
+
+       <li> <a
+       href="http://www.catb.org/~esr/writings/unix-koans/end-user.html">
+       The Koan of Master Foo and the End User</a>. </li>
+
        <li> <a href="https://lwn.net/Articles/411845/">Ghosts of Unix Past:
        a historical search for design patterns</a>, by Neil Brown. </li>