Chapter 2. Installing JBoss Web Server on Red Hat Enterprise Linux

Procedure 2.1. Installing a Java Development Kit (JDK)

1. Subscribe your Red Hat Enterprise Linux system to the appropriate supplementary channel:
   • Red Hat Enterprise Linux Server Supplementary for Red Hat Enterprise Linux 6
   • Red Hat Enterprise Linux Server Supplementary for Red Hat Enterprise Linux 7
2. As the root user, execute the command to install a 1.7 or 1.8 JDK:

   • # yum install java-1.7.0-<VENDOR>-devel

     Replace <VENDOR> with oracle, ibm, or openjdk.

   • # yum install java-1.8.0-<VENDOR>-devel

     Replace <VENDOR> with oracle, ibm, or openjdk.
3. Run the following commands as the root user to ensure the correct JDK is in use:

   # alternatives --config java

   # alternatives --config javac

   These commands return lists of available JDK versions with the selected version marked with a plus (+) sign. If the selected JDK is not the desired one, change to the desired JDK as instructed in the shell prompt.

   Important

   All software that use the java and javac commands uses the JDK set by alternatives. Changing Java alternatives may impact on the running of other software.

Procedure 2.2. Removing the tomcatjss Package

• As the root user, run the following command to remove tomcatjss:

  # yum remove tomcatjss

Procedure 2.3. Installing Required Packages

• For your version of Red Hat Enterprise Linux, run the install command below as the root user:
  • For Red Hat Enterprise Linux 6:

    # yum install krb5-workstation elinks mailcap

  • For Red Hat Enterprise Linux 7:

    # yum install apr apr-devel apr-util apr-util-devel apr-util-ldap elinks krb5-workstation mailcap