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b59e5eb3ea
phrasal verb, it is spelled as two words. This commit fixes most of the misspelled "set up" instances in the BLFS book.
129 lines
4.3 KiB
XML
129 lines
4.3 KiB
XML
<?xml version="1.0" encoding="ISO-8859-1"?>
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<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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<!ENTITY % general-entities SYSTEM "../../general.ent">
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%general-entities;
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]>
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<sect1 id="ojdk-conf" xreflabel="Configuring the JAVA environment">
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<?dbhtml filename="ojdk-conf.html"?>
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<title>Configuring the JAVA environment</title>
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<sect2 id="java-profile">
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<title>Setting up the environment</title>
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<para>
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After the package installation is complete, the next step is to make sure
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that the system can properly find the files. If you set up your login
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scripts as recommended in <xref linkend='postlfs-config-profile'/>, update
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the environment by creating the <filename>openjdk.sh</filename> script,
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as the <systemitem class="username">root</systemitem> user:
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</para>
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<screen role="root"><userinput>cat > /etc/profile.d/openjdk.sh << "EOF"
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<literal># Begin /etc/profile.d/openjdk.sh
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# Set JAVA_HOME directory
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JAVA_HOME=/opt/jdk
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# Adjust PATH
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pathappend $JAVA_HOME/bin
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# Add to MANPATH
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pathappend $JAVA_HOME/man MANPATH
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# Auto Java CLASSPATH: Copy jar files to, or create symlinks in, the
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# /usr/share/java directory.
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AUTO_CLASSPATH_DIR=/usr/share/java
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pathprepend . CLASSPATH
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for dir in `find ${AUTO_CLASSPATH_DIR} -type d 2>/dev/null`; do
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pathappend $dir CLASSPATH
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done
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for jar in `find ${AUTO_CLASSPATH_DIR} -name "*.jar" 2>/dev/null`; do
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pathappend $jar CLASSPATH
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done
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export JAVA_HOME
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unset AUTO_CLASSPATH_DIR dir jar
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# End /etc/profile.d/openjdk.sh</literal>
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EOF</userinput></screen>
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<para>
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If <xref linkend="sudo"/> is installed, the super user should have
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access to the above variables. Execute the following commands as the
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<systemitem class="username">root</systemitem> user:
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</para>
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<screen role="root"><userinput>cat > /etc/sudoers.d/java << "EOF"
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<literal>Defaults env_keep += JAVA_HOME
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Defaults env_keep += CLASSPATH</literal>
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EOF</userinput></screen>
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<para>
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To use <command>mandb</command> to include the OpenJDK man pages
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in its database, issue, as the <systemitem class="username">root
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</systemitem> user:
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</para>
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<screen role="root"><userinput>cat >> /etc/man_db.conf << "EOF" &&
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<literal># Begin Java addition
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MANDATORY_MANPATH /opt/jdk/man
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MANPATH_MAP /opt/jdk/bin /opt/jdk/man
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MANDB_MAP /opt/jdk/man /var/cache/man/jdk
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# End Java addition</literal>
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EOF
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mkdir -p /var/cache/man &&
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mandb -c /opt/jdk/man</userinput></screen>
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</sect2>
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<sect2 id="ojdk-certs" xreflabel="installing the JVM Certificate Authority Certificates">
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<title>Setting up the Certificate Authority Certificates for Java</title>
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<para>
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<application>OpenJDK</application> uses its own format for the
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CA certificates. The Java security modules use
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<envar>$JAVA_HOME</envar><filename>/lib/security/cacerts</filename> by
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default. In order to keep all the certificates in one place, we use
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<filename>/etc/ssl/java/cacerts</filename>. The instructions
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on the <xref linkend="make-ca"/> page previously created the file
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located in <filename class="directory">/etc/ssl/java</filename>.
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Set up a symlink in the default location as the
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<systemitem class="username">root</systemitem> user:
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</para>
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<screen role="root"><userinput>ln -sfv /etc/pki/tls/java/cacerts /opt/jdk/lib/security/cacerts</userinput></screen>
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<para>
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Use the following command to check if the <filename>cacerts</filename>
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file has been successfully installed:
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</para>
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<screen role="root"><userinput>/opt/jdk/bin/keytool -list -cacerts</userinput></screen>
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<para>
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At the prompt <computeroutput>Enter keystore password:</computeroutput>,
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enter <userinput>changeit</userinput> (the default) or just press the
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<quote>Enter</quote> key. If the <filename>cacerts</filename> file was
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installed correctly, you will see a list of the certificates with
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related information for each one. If not, you need to reinstall them.
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</para>
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<para>
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If you later install a new JVM, you just have to create the symlink in
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the default location to be able to use the cacerts.
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</para>
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</sect2>
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</sect1>
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