X-Git-Url: http://git.tuebingen.mpg.de/?p=aple.git;a=blobdiff_plain;f=Unix_Concepts.m4;h=3841c01348f9f75c1844197299a3a920d69ed015;hp=938befcd3590d3a3cb421f79b4dc566addb44f53;hb=6e180aa165b254a93547aa0fd897e129f9f020b7;hpb=79996651ef472fdf9e09298afa56b4498b05400c

diff --git a/Unix_Concepts.m4 b/Unix_Concepts.m4
index 938befc..3841c01 100644
--- 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>