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8: <title>LON-CAPA Installation</title>
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10: <!-- button INSTALL -->
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14: <br />
15: <p>
16: You will need to check all the following things to ensure proper
17: installation of your LON-CAPA system.
18: </p>
19: <ul>
20: <li><a href="#wwwuser">
21: Creating a user 'www'</a></li>
22: <li><a href="#shadow">
23: Make a LON-CAPA system work with shadow passwords</a></li>
24: <li><a href="#install">
25: Installing LON-CAPA files</a></li>
26: <li><a href="#checkrpms">
27: Checking your Linux RPMs</a></li>
28: <li><a href="#mysql">
29: Configuring the MySQL database</a></li>
30: <li><a href="#testing">
31: Testing to see if the LON-CAPA server is operational</a></li>
32: </ul>
33: <p>
34: <strong>NOTE:</strong>
35: If you want to simultaneously install both RedHat 7.3 and LON-CAPA
36: (to ensure 100% reliability), follow <a href="rh73.html">these
37: alternative directions</a>.
38: </p>
39: <ul>
40: <li><a href="#wwwuser">
41: Creating a user 'www'</a></li>
42: <br />
43: <!-- preamble end -->
44: <!-- maintext start -->
45: <a name="wwwuser" />
46: <h3>Creating a user 'www'</h3>
47: <p>
48: Execute the following command to create a user named 'www' on your
49: LON-CAPA server:
50: </p>
51: <table bgcolor="#aaaaaa" border="1"><tr><td>
52: <tt>/usr/sbin/useradd www</tt>
53: </td></tr></table>
54: <a name="shadow" />
55: <h3>Make a LON-CAPA system work with shadow passwords</h3>
56: <table border="1">
57: <tr><th>Step #</th><th>Description</th></tr>
58: <tr><td>
59: <font size="+1">1</font>
60: </td><td>
61: <p>Is your system using shadow passwords? (Note: LON-CAPA will
62: work with either MD5/non-MD5 configured systems). If your
63: system is not using shadow passwords, then do not perform
64: any of the additional steps. If your system is using shadow
65: passwords, then you will need to perform the additional steps below.
66: </p>
67: <p>
68: <strong>How to detect:</strong>
69: <br />command: <tt>cat /etc/passwd | grep ':x:'</tt>
70: </p>
71: <p>If there is output such as "<tt>root:x:0:0:root:/root:/bin/bash</tt>",
72: then your system is using shadow passwords and you will need to continue with
73: the steps below.
74: </p>
75: </td></tr>
76: <tr><td>
77: <font size='+1'>2</font>
78: </td><td>
79: <p><strong>Retrieve the mod_auth_external source</strong> by
80: running the following command
81: </p>
82: <p><tt>
83: wget http://www.wwnet.net/~janc/software/mod_auth_external-2.1.13.tar.gz
84: </tt>
85: </p>
86: </td></tr>
87: <tr><td>
88: <font size='+1'>3</font>
89: </td><td>
90: <p><strong>Unpack the mod_auth_external source</strong> by
91: running the following command
92: </p>
93: <p>
94: <tt>tar xzvf mod_auth_external-2.1.13.tar.gz</tt>
95: </p>
96: </td></tr>
97: <tr><td>
98: <font size='+1'>4</font>
99: </td><td>
100: <p><strong>Go to the <tt>pwauth</tt> directory</strong> by
101: running the following command
102: </p>
103: <p>
104: <tt>cd mod_auth_external-2.1.13/pwauth/</tt>
105: </p>
106: </td></tr>
107: <tr><td>
108: <font size='+1'>5</font>
109: </td><td>
110: <p><strong>Edit <tt>config.h</tt> and change SERVER_UIDS definition</strong>
111: </p>
112: <p>
113: Determine the user id of 'www':
114: <br /><tt>grep ^www /etc/passwd | cut -d':' -f3</tt>
115: <br />
116: Change the line
117: <br /><tt>#define SERVER_UIDS 99 /* user "nobody" */</tt>
118: <br />to be
119: <br /><tt>#define SERVER_UIDS 513 /* user "www" */</tt>
120: <br />where in this example 513 corresponds to the user id of 'www'.
121: </p>
122: </td></tr>
123: <tr><td>
124: <font size='+1'>6</font>
125: </td><td>
126: <p><strong>Compile the <tt>pwauth</tt> executable</strong> by
127: running the following command
128: </p>
129: <p>
130: <tt>make</tt>
131: </p>
132: </td></tr>
133: <tr><td>
134: <font size='+1'>7</font>
135: </td><td>
136: <p><strong>Install <tt>pwauth</tt></strong> by doing the following
137: </p>
138: <p>
139: <tt>cp pwauth /usr/local/sbin/</tt>
140: <br /><tt>chmod 6755 /usr/local/sbin/pwauth</tt>
141: </p>
142: <p>
143: Edit (creating the file) /etc/pam.d/pwauth to have the contents:
144: </p>
145: <pre>
146: auth required /lib/security/pam_pwdb.so shadow nullok
147: auth required /lib/security/pam_nologin.so
148: account required /lib/security/pam_pwdb.so
149: </pre>
150: </td></tr>
151: </table>
152: <a name="install" />
153: <h3>Installing LON-CAPA files</h3>
154: <p>
155: Download the most current
156: <a href="http://install.lon-capa.org/versions/current/loncapa.tar.gz">
157: loncapa.tar.gz</a>.
158: </p>
159: <table bgcolor="#aaaaaa" border="1">
160: <tr><td><tt>wget http://install.lon-capa.org/versions/current/loncapa.tar.gz
161: </tt>
162: <br />
163: <tt>tar xzvf loncapa.tar.gz</tt>
164: <br />
165: <tt>cd loncapa</tt></td></tr>
166: </table>
167: <p>
168: The <strong>UPDATE</strong> command will refresh your filesystem with all
169: the latest LON-CAPA software.
170: </p>
171: <table bgcolor="#aaaaaa" border="1">
172: <tr><td><tt>./UPDATE</tt></td></tr>
173: </table>
174: <a name="checkrpms" />
175: <h3>Checking your Linux RPMs</h3>
176: <p>
177: The <strong>CHECKRPMS</strong> command will check the RPMs on your machine
178: against an FTP repository.
179: </p>
180: <table bgcolor="#aaaaaa" border="1">
181: <tr><td><tt>./CHECKRPMS</tt></td></tr>
182: </table>
183: <a name="mysql" />
184: <h3>Configuring the MySQL database</h3>
185: <p>
186: The following commands describe how to configure the MySQL database
187: on your LON-CAPA server.
188: <br />Note:
189: </p>
190: <ul>
191: <li>you should substitute 'ROOTPASSWORD' with something very hard to guess
192: (it does not have to be the Linux OS root password)
193: </li>
194: <li>The MySQL www@localhost user must always have a password of 'localhostkey'
195: in order for there to be correct operation of a standard LON-CAPA system.
196: </li>
197: </ul>
198: <p>
199: The following instructions assume you are logged in as 'root'.
200: </p>
201: <p>Entering the mysql shell</p>
202: <table bgcolor="#aaaaaa" border="1"><tr><td>
203: <pre>
204: mysql -u root -p mysql
205: OR
206: mysql -u root mysql (depending on whether you have set a root password)
207: </pre>
208: </td></tr></table>
209: <p>Creating the mysql 'www' user (after entering mysql shell)</p>
210: <table bgcolor="#aaaaaa" border="1"><tr><td>
211: <pre>
212: mysql> CREATE DATABASE loncapa;
213:
214: mysql> INSERT INTO user (Host, User, Password)
215: mysql> VALUES ('localhost','www',password('localhostkey'));
216:
217: mysql> GRANT ALL PRIVILEGES ON *.* TO www@localhost;
218:
219: mysql> FLUSH PRIVILEGES;
220: </pre>
221: </td></tr></table>
222: <p>SECURITY: set a password for the mysql 'root' user</p>
223: <table bgcolor="#aaaaaa" border="1"><tr><td>
224: <pre>
225: shell> mysql -u root mysql
226: mysql> SET PASSWORD FOR root@localhost=PASSWORD('ROOTPASSWORD');
227: </pre>
228: </td></tr></table>
229: <p>SECURITY: only allow access from localhost</p>
230: <table bgcolor="#aaaaaa" border="1"><tr><td>
231: <pre>
232: shell> mysql -u root -p mysql
233: mysql> DELETE FROM user WHERE host<>'localhost';
234: </pre>
235: </td></tr></table>
236: <a name="testing" />
237: <h3>Testing to see if the LON-CAPA server is operational</h3>
238: <p>
239: The <strong>TEST</strong> command will check the installation software,
240: the perl libraries on your system, the MySQL database, and
241: will also automatically test the real-time operation of the
242: LON-CAPA Apache web server.
243: </p>
244: <table bgcolor="#aaaaaa" border="1">
245: <tr><td><tt>./TEST</tt></td></tr>
246: </table>
247: <p>
248: Using the <strong>TEST</strong> command will likely
249: be an iterative process.
250: It is normal to expect that the <strong>TEST</strong> command
251: will recommend you perform various steps to ensure optimal
252: performance of your LON-CAPA server.
253: </p>
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