Install JDK Manually on Linux
Download JDK 6.0 and 7.0 from Oracle Technology Network
For example jdk 1.6.0_35, extract it to /opt/java/jdk1.6.0_35
Tell the system that there's a new Java version available by using update-alternatives command
update-alternatives --install <link> <name> <path> <priority> [--slave <link> <name> <path>] ...
add a group of alternatives to the system.
Install JDK
example, install JDK 1.6.0_35:
update-alternatives --install "/usr/bin/java" "java" "/opt/jdk1.6.0_35/bin/java" 1 update-alternatives --install "/usr/bin/java" "java" "/opt/jdk1.6.0_35/jre/bin/java" 2
Same as:
update-alternatives --install /usr/bin/java java /opt/jdk1.6.0_35/bin/java 1 update-alternatives --install "/usr/bin/java java /opt/jdk1.6.0_35/jre/bin/java 2
NOTE: " " is optional.
Set the new JRE as the default:
sudo update-alternatives --set java /opt/java/jdk1.6.0_35/bin/java
or
sudo update-alternatives --config java root@ubuntu:/opt# update-alternatives --config java There are 3 choices for the alternative java (providing /usr/bin/java). Selection Path Priority Status ------------------------------------------------------------ 0 /usr/lib/jvm/java-6-openjdk-amd64/jre/bin/java 1061 auto mode * 1 /opt/jdk1.6.0_35/bin/java 1 manual mode 2 /opt/jdk1.6.0_35/jre/bin/java 2 manual mode 3 /usr/lib/jvm/java-6-openjdk-amd64/jre/bin/java 1061 manual mode Press enter to keep the current choice[*], or type selection number:
Choose and run java -version to confirm.
Remove old JRE/JDK links (to upgrade)
For example, upgrade from JDK 1.6.0_35 to 1.6.0_37:
root@ubuntu:/opt# update-alternatives --remove "java" "/opt/jdk1.6.0_35/bin/java" root@ubuntu:/opt# update-alternatives --remove "java" "/opt/jdk1.6.0_35/jre/bin/java" update-alternatives: removing manually selected alternative - switching java to auto mode update-alternatives: using /usr/lib/jvm/java-6-openjdk-amd64/jre/bin/java to provide /usr/bin/java (java) in auto mode.
Install new JRE/JDK
For example:
sudo update-alternatives --install "/usr/bin/java" "java" "/opt/jdk1.6.0_37/bin/java" 1 sudo update-alternatives --install "/usr/bin/java" "java" "/opt/jdk1.6.0_37/jre/bin/java" 2
For internals, look into
- alternatives directory containing symbolic links - /etc/alternatives
- administration directory containing state information - /var/lib/dpkg/alternatives
Browser plugins (Firefox and Chrome)
Manual Plugin Install on Linux
Google Chrome (Ubuntu)
/opt/google/chrome
libpdf.so (built-in PDF viewer)
Try Creating symbolic link to libnpjp2.so
ln -s /opt/jdk1.6.0_37/jre/lib/amd64/libnpjp2.so /opt/google/chrome/libnpjp2.so
NOTE: The above does NOT work!
Create the symbolic link in Firefox plugins folder (works system wide, for all users)
ln -s /opt/jdk1.6.0_37/jre/lib/amd64/libnpjp2.so /usr/lib/mozilla/plugins/libnpjp2.so
OR
ln -s /opt/jdk1.6.0_37/jre/lib/amd64/libnpjp2.so /usr/lib/firefox/plugins/libnpjp2.so
Per User
create the symbolic link in ~/.mozilla/plugins or Firefox profile’s plugins folder in ~/.mozilla/firefox
For example:
ln -s /opt/jdk1.6.0_37/jre/lib/amd64/libnpjp2.so /home/terry/.mozilla/plugins/libnpjp2.so
Firefox profile /home/terry/.mozilla/firefox/7n8pq28j.default/plugins
ln -s /opt/jdk1.6.0_37/jre/lib/amd64/libnpjp2.so /home/terry/.mozilla/firefox/7n8pq28j.default/plugins/libnpjp2.so
NOTE: For my major Linux workstation, symbolic link is in ~/.mozilla/plugins
GitHub project - oab-java.sh script, build .deb packages and set up a local repository, install from local repository
Reference
Build Debian/Ubuntu packages from OTN binaries
https://github.com/rraptorr/oracle-java7/blob/master/debian/JB-plugin.prerm.in
https://github.com/rraptorr/oracle-java7/blob/master/debian/JB-plugin.postinst.in