mirror of
https://github.com/Zeckmathederg/glfs.git
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133 lines
4.4 KiB
XML
133 lines
4.4 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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<sect1info>
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<date>$Date$</date>
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</sect1info>
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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. Note that having gcj jars with OpenJDK 8
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# may lead to errors.
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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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For allowing <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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Setup 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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