[487b8e6] | 1 | <sect2><title> </title><para> </para></sect2>
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| 2 |
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[6370fa6] | 3 | <sect2>
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| 4 | <title>Installation of Shadow Password Suite</title>
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| 5 |
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[bc8b8a6] | 6 | <para>Before you install this package, you may want to have a look at
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| 7 | the Shadow hint. It discusses how you can make your system more secure
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[6a9875d] | 8 | regarding passwords, such as how to enable the more secure MD5 passwords
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[bc8b8a6] | 9 | and how to get the most out of this Shadow package. The Shadow hint can
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| 10 | be found at <ulink url="&hints-root;shadowpasswd_plus.txt"/>.</para>
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[ea01d138] | 11 |
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[8a0d0eb2] | 12 | <para>The <userinput>login</userinput>, <userinput>getty</userinput> and
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| 13 | <userinput>init</userinput> programs (and some others) maintain a number
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| 14 | of logfiles to record who are and who were logged in to the system. These
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| 15 | programs, however, don't create these logfiles when they don't exist, so if
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| 16 | you want this logging to occur you will have to create the files yourself.
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| 17 | To let the Shadow package (that is installed next) detect these files in their
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| 18 | proper place, create them now, with their proper permissions:</para>
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[6e50755] | 19 |
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| 20 | <para>Create these files with their proper permissions by running the
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| 21 | following commands:</para>
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| 22 |
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[4a7a683] | 23 | <para><screen><userinput>touch /var/run/utmp /var/log/{btmp,lastlog,wtmp}
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[f26c68d] | 24 | chmod 644 /var/run/utmp /var/log/{btmp,lastlog,wtmp}</userinput></screen></para>
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[6e50755] | 25 |
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[8a0d0eb2] | 26 | <para>The <filename>/var/run/utmp</filename> file lists the users that are
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| 27 | currently logged in, the <filename>/var/log/wtmp</filename> file who
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| 28 | <emphasis>were</emphasis> logged in and when.
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| 29 | The <filename>/var/log/lastlog</filename> file shows for each user when he
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| 30 | or she last logged in, and the <filename>/var/log/btmp</filename> lists the
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| 31 | bad login attempts.</para>
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| 32 |
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| 33 | <para>Shadow hard-wires the path to the <userinput>passwd</userinput> binary
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| 34 | within the binary itself, but does this the wrong way. If before installing
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| 35 | Shadow no <userinput>passwd</userinput> binary is present , the package wrongly
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| 36 | assumes it is going to be located at <filename>/bin/passwd</filename>,
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| 37 | but then installs it in <filename>/usr/bin/passwd</filename>. This will lead
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| 38 | to weird errors about not finding <filename>/bin/passwd</filename>. To work
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| 39 | around this bug, create a dummy <filename>passwd</filename> file,
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| 40 | so that it gets hard-wired properly:</para>
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[0c418fc] | 41 |
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| 42 | <para><screen><userinput>touch /usr/bin/passwd</userinput></screen></para>
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| 43 |
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[0c84f8a] | 44 | <para>The current shadow suite has a problem in the newgrp command which causes
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| 45 | it to fail. The following patch (also appearing in Shadow's CVS code) fixes
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| 46 | this problem.</para>
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| 47 |
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| 48 | <para><screen><userinput>patch -Np1 -i ../shadow-&shadow-patch-version;.patch
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| 49 | </userinput></screen></para>
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| 50 |
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[8a0d0eb2] | 51 | <para>Now prepare Shadow for compilation:</para>
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[6370fa6] | 52 |
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[8a0d0eb2] | 53 | <para><screen><userinput>./configure --prefix=/usr --libdir=/usr/lib --enable-shared</userinput></screen></para>
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[487b8e6] | 54 |
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[8a0d0eb2] | 55 | <para>Compile the package:</para>
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[487b8e6] | 56 |
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| 57 | <para><screen><userinput>make</userinput></screen></para>
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| 58 |
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[8a0d0eb2] | 59 | <para>And install it:</para>
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[487b8e6] | 60 |
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| 61 | <para><screen><userinput>make install</userinput></screen></para>
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| 62 |
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[8a0d0eb2] | 63 | <para>Shadow uses two files to configure authentication settings for the
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| 64 | system. Install these two config files:</para>
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[487b8e6] | 65 |
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| 66 | <para><screen><userinput>cp etc/{limits,login.access} /etc</userinput></screen></para>
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| 67 |
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[8a0d0eb2] | 68 | <para>In the old days <filename class="directory">/var/spool/mail</filename>
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| 69 | was the location for the user mailboxes, but nowadays <filename
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| 70 | class="directory">/var/mail</filename> is used. Change the default mailbox
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| 71 | location in the relevant configuration file while copying it to its
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| 72 | destination:</para>
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[487b8e6] | 73 |
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| 74 | <para><screen><userinput>sed 's%/var/spool/mail%/var/mail%' \
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| 75 | etc/login.defs.linux > /etc/login.defs</userinput></screen></para>
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| 76 |
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[8a0d0eb2] | 77 | <para>According to the man page of <userinput>vipw</userinput>, a
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| 78 | <userinput>vigr</userinput> program should exist too. Since the installation
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| 79 | procedure doesn't create this program, create a symlink manually:</para>
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[487b8e6] | 80 |
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| 81 | <para><screen><userinput>ln -s vipw /usr/sbin/vigr</userinput></screen></para>
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| 82 |
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[8a0d0eb2] | 83 | <para>As the <filename>/bin/vipw</filename> symlink is redundant (and even
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| 84 | pointing to a non-existent file), remove it:</para>
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[487b8e6] | 85 |
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| 86 | <para><screen><userinput>rm /bin/vipw</userinput></screen></para>
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| 87 |
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[8a0d0eb2] | 88 | <para>Now move the <userinput>sg</userinput> program to its proper place:</para>
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[487b8e6] | 89 |
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| 90 | <para><screen><userinput>mv /bin/sg /usr/bin</userinput></screen></para>
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| 91 |
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[8a0d0eb2] | 92 | <para>And move Shadow's dynamic libraries to a more appropriate location:</para>
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[487b8e6] | 93 |
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| 94 | <para><screen><userinput>mv /usr/lib/lib{shadow,misc}.so.0* /lib</userinput></screen></para>
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| 95 |
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[8a0d0eb2] | 96 | <para>As some packages expect to find the just-moved libraries in
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| 97 | <filename>/usr/lib</filename>, create the following symlinks:</para>
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[487b8e6] | 98 |
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[4a7a683] | 99 | <para><screen><userinput>ln -sf ../../lib/libshadow.so.0 /usr/lib/libshadow.so
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[8d8ab63] | 100 | ln -sf ../../lib/libmisc.so.0 /usr/lib/libmisc.so</userinput></screen></para>
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[6370fa6] | 101 |
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[8a0d0eb2] | 102 | <para>Coreutils has already installed a <userinput>groups</userinput> program
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| 103 | in <filename>/usr/bin</filename>. If you wish, you can remove the one
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| 104 | installed by Shadow:</para>
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[819ecc65] | 105 |
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| 106 | <para><screen><userinput>rm /bin/groups</userinput></screen></para>
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[6370fa6] | 107 |
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[819ecc65] | 108 | </sect2>
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[8a0d0eb2] | 109 |
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