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| author | Owen Jacobson <owen@grimoire.ca> | 2020-01-28 23:34:06 -0500 |
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| committer | Owen Jacobson <owen@grimoire.ca> | 2020-01-28 23:34:06 -0500 |
| commit | 34708dfa902afabf4833c25233132e56514915de (patch) | |
| tree | 0f4fd5c2c8d782885c5b821114b060e89fce1dcd /wiki/java/install/ubuntu.md | |
| parent | 9bf334de6a2a17371eae9bcdf342c416332350aa (diff) | |
| parent | 6a7b97b436a5a20c172e6b04bf0caa37d544fde4 (diff) | |
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diff --git a/wiki/java/install/ubuntu.md b/wiki/java/install/ubuntu.md deleted file mode 100644 index 75d3478..0000000 --- a/wiki/java/install/ubuntu.md +++ /dev/null @@ -1,84 +0,0 @@ -# Installing Java on Ubuntu - -Accurate as of: Java 7, Ubuntu 12.04. The instructions below assume an amd64 -(64-bit) installation. If you're still using a 32-bit OS, work out the -differences yourself. - -## Via Package Management (Apt) - -OpenJDK 7 is available via apt by default. - -To install the JDK: - - sudo aptitude update - sudo aptitude install openjdk-7-jdk - -To install the JRE only (without the JDK): - - sudo aptitude update - sudo aptitude install openjdk-7-jre - -To install the JRE without GUI support (appropriate for headless servers): - - sudo aptitude update - sudo aptitude install openjdk-7-jre-headless - -(You can also use `apt-get` instead of `aptitude`.) - -These packages interact with [the `alternatives` -system](http://manpages.ubuntu.com/manpages/hardy/man8/update-alternatives.8.html), -and have [a dedicated `alternatives` manager -script](http://manpages.ubuntu.com/manpages/hardy/man8/update-java-alternatives.8.html). -The `alternatives` system affects `/usr/bin/java`, `/usr/bin/javac`, and -browser plugins for applets and Java Web Start applications for browsers -installed via package management. It also affects the symlinks under -`/etc/alternatives` related to Java. - -To list Java versions available, with at least one Java version installed via -Apt: - - update-java-alternatives --list - -To switch to `java-1.7.0-openjdk-amd64` for all Java invocations: - - update-java-alternatives --set java-1.7.0-openjdk-amd64 - -The value should be taken from the first column of the `--list` output. - -### Tool support - -Most modern Java tools will pick up the installed JDK via `$PATH` and do not -need the `JAVA_HOME` environment variable set explicitly. For applications old -enough not to be able to detect the JDK, you can set `JAVA_HOME` to -`/usr/lib/jvm/java-1.7.0-openjdk-amd64`. - -## By Hand - -The [Java SE Development Kit -7](http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html) -tarballs can be installed by hand. Download the “Linux x64” `.tar.gz` version, -then unpack it in `/opt`: - - cd /opt - tar xzf ~/jdk-7u45-linux-x64.tar.gz - -This will create a directory named `/opt/jdk1.7.0_45` (actual version number -may vary) containing a ready-to-use Java dev kit. - -You will need to add the JDK's `bin` directory to `PATH` if you want commands -like `javac` and `java` to work without fully-qualifying the directory: - - cat > /etc/profile.d/oracle_jdk <<'ORACLE_JDK' - PATH="${PATH}:/opt/jdk1.7.0_45/bin" - export PATH - ORACLE_JDK - -(This will not affect non-interactive use; setting PATH for non-interactive -programs like build servers is beyond the scope of this document. Learn to use -your OS.) - -Installation this way does _not_ interact with the alternatives system (but -you can set that up by hand if you need to). - -For tools that cannot autodetect the JDK via `PATH`, you may need to set -`JAVA_HOME` to `/opt/jdk1.7.0_45`. |
