How can I get the jar command?

Solution Verified - Updated -

Environment

  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • OpenJDK

Issue

  • jar command is not found even OpenJDK packages are installed

    # rpm -qa | grep openjdk
java-1.8.0-openjdk-headless-1.8.0.252.b09-3.el8_2.x86_64
java-1.8.0-openjdk-1.8.0.252.b09-3.el8_2.x86_64

# jar
-bash: jar: command not found

  • Need to ensure current installed OpenJDK version will not be overrided or updated

Resolution

  • To ensure current installed version of OpenJDK will not be overrided or updated:

    • Check current installed version of OpenJDK

      # rpm -qa | grep openjdk
java-1.8.0-openjdk-headless-1.8.0.252.b09-3.el8_2.x86_64        <----==== 1.8.0.252.b09-3.el8_2
java-1.8.0-openjdk-1.8.0.252.b09-3.el8_2.x86_64                 <----==== 1.8.0.252.b09-3.el8_2

    • Install same version of java-XXX-openjdk-devel as above

      # yum install java-1.8.0-openjdk-devel-1.8.0.252.b09-3.el8_2.x86_64      <----==== 1.8.0.252.b09-3.el8_2

Root Cause

  • jar command is provided by java-XXX-openjdk-devel package

    # yum provides */jar
<...>
java-1.8.0-openjdk-devel-1:1.8.0.252.b09-3.el8_2.x86_64 : OpenJDK Development Environment 8
<...>

  • java-XXX-openjdk-devel package is not required by the OpenJDK packages in dependency relationship

    # yum deplist java-1.*.0-openjdk | grep openjdk-devel
<no output>

    Therefore it is not installed even OpenJDK packages are installed

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