I require jre7 to run an applet which is posted by some site, on the other hand i require java6 on my machine so that my hadoop commands should work. I cannot upgrade from java6 to java7. And I cannot install jre7 unless i have java7 on my machine. What should i do?
You can install both Java 6 and Java 7 side by side. Since you apparently need both, that is one option.
It is also highly likely that Hadoop will work with Java 7 as well as Java 6:
Java 7 is designed to be backwards compatible with earlier Java releases.
It is highly likely that any (hypothetical) compatibility issues with Hadoop on Java 7 were fixed a long time ago.)
So a second option would be to simply upgrade to Java 7, and then uninstall Java 6 to save disc space.
First you need to remove openjdk
sudo apt-get purge openjdk*
To install java 7 run the following code
sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java7-installer
Related
I have a legacy project that I'm trying to modernize, and part of that involves setting up a more efficient system of automated backups using mysqldump.
The app's database is using MySQL 5.6, and is hosted via an RDS instance. To get mysqldump up and running, I believe I need to install a version of mysql-client that corresponds to 5.6.
However, running apt-get install mysql-client installs 8.0 by default. However, I can't find any version-specific versions of mysql-client available. Running sudo apt-get install mysql-client-5.7 returns a notice that there's no installation candidate available.
Is it still possible to install older versions of mysql-client? If not, is there another way to get ahold of the mysqldump functionality?
Edit: As #exussum noted below, 8.0 is backwards compatible with 5.6 and 5.7. I was hitting errors when running mysqldump, which I'd assumed indicated incompatibility, but were actually related to my app specifically.
They are backwards compatible, so you can use mysql-client 8 to dump mysql-server 5.5
to get a specific version docker is great
(sudo apt install docker) to install
docker run mysql:5.6 mysqldump
will run mysqldump though docker, and you can choose your version there easily enough
The RPM given on the official website does not have the pgadmin4 package for Fedora 30.
Is there a known workaround?
Edit: Relevant packages are now included in the RPM, so there is no issue anymore.
You can use the link that points to the x64 package:
sudo dnf -y install https://download.postgresql.org/pub/repos/yum/reporpms/F-30-x86_64/pgdg-fedora-repo-latest.noarch.rpm
then you will be able to dnf search and install pgadmin4 normally.
Apparently there is a mistake in the docs for that distro.
You'd have to wait until Devrim gets around to rolling RPMs for Fedora 30.
The alternative is to build the software from source.
EDIT: In the meantime, packages for Fedora 30 are available.
Running a Laravel installation on a RedHat Enterprise Linux 7 server using PHP 7.1. I can see php-pgsql.x86_64 listed in the available yum packages, but it doesn't appear to be compatible with PHP 7.1 (and indeed is listed as version 5.4.16-43.el7_4.1).
On a lark, I tried installing it anyway and physically moved the pgsql.ini and pdo_pgsql.ini files from /etc/php.d into the relevant PHP 7.1 folder /etc/opt/rh/rh-php71/php.d/ (and did the same with the .so files they reference), but that returns an error indicating that the package couldn't be read (undefined symbol: file_globals_id in Unknown on line 0).
Has anyone managed to get PHP 7.1 talking to PostgreSQL on RHEL 7?
The sysadmin who originally created the server for me set me straight. The problem was I was looking in the wrong repository for the packages I needed for my particular PHP installation. Running the following two commands did the trick:
sudo yum install --disablerepo=* --enablerepo=rhui-REGION-rhel-server-rhscl rh-php71-php-odbc
sudo yum install --disablerepo=* --enablerepo=rhui-REGION-rhel-server-rhscl rh-php71-php-pgsql
We then added those two packages to the Ansible playbook so future generations would not suffer needlessly.
I need to install pljava for postgresql 9.3 on Ubuntu 14.04. I installed the 64bit version of postgre using the apt-get packet manager of Ubuntu, and I tried installing pljava in the same way
sudo apt-get install postgresql-9.3-pljava-gcj
but it gives me the "unmet dependencies error"
The following packages have unmet dependencies:
postgresql-9.3-pljava-gcj:i386 : Depends: postgresql-9.3:i386 but it is not going to be installed
Apparently, there's no version of pljava for 64bit architectures of pljava for postgresql 9.3. Also searching the Web led me to this conclusion (https://launchpad.net/ubuntu/+source/postgresql-pljava/1.4.3-3 - see the "not build" versions of the packet).
Now, my problem is that I have to use a 64bit version of postgresql-9.3, and I definitely need pljava to embed some "java triggering" inside the db. Does anyone know any solution to this issue? Can I use pljava-9.1 with postgresql-9.3? Anything else?
Thanks a lot
There is no maintained PL/JAVA package for Ubuntu anymore. The package you mentioned is using a too old version of PL/JAVA, depending on gcj. It is highly recommended to use PL/JAVA version 1.5.0, using a recent Oracle or OpenJDK java version.
The sad news is you have to build it yourself. For instructions, see
https://tada.github.io/pljava/build/build.html (building)
https://tada.github.io/pljava/install/install.html (installing)
At the time this question was asked, it was true that there were not maintained PL/Java packages for Ubuntu.
Just to update the story, more recently there are. They can be found in the PGDG apt repository.
I'm trying to run Eclipse 4.2 (latest from website: eclipse-SDK-4.2-macosx-cocoa-x86_64) on Mac OS X 10.8 (Mountain Lion).
I have Java 7 installed, but I keep getting prompted to install Java 6. When I choose to forgo the install by clicking "Not Now", Eclipse exits.
$ java -version
java version "1.7.0_05"
Java(TM) SE Runtime Environment (build 1.7.0_05-b06)
Java HotSpot(TM) 64-Bit Server VM (build 23.1-b03, mixed mode)
$ whereis java
/usr/bin/java
Any ideas on how to get Eclipse to work with the latest version of Java? README is lacking any useful information (and even claims Eclipse was tested with Java 7 on some platforms).
UPDATE:
Running sudo /Applications/.Eclipse/Eclipse.app/Contents/MacOS/eclipse works fine. After running under sudo and then switching back to lowly me with /Applications/.Eclipse/Eclipse.app/Contents/MacOS/eclipse results in a lock file error (permission denied).
It appears I have two problems:
Running through icon click results in "Need Java 6"
Running from command line results in "Permission Denied"
UPDATE: It appears to be more junk from Cupertino:
Apple Radar: 12082976
Here's the text that Apple wants to hide from the world:
I purchased a new Mac Book Pro. I immediately upgraded to Mountain Lion. I installed Java 7 from Sun [Oracle]:
$ java -version
java version "1.7.0_05"
Java(TM) SE Runtime Environment (build 1.7.0_05-b06)
Java HotSpot(TM) 64-Bit Server VM (build 23.1-b03, mixed mode)
$ whereis java
/usr/bin/java
$ /usr/libexec/java_home
/Library/Java/JavaVirtualMachines/1.7.0.jdk/Contents/Home
When I attempt to run the Java Preferences (in /Applications/Utilities) and Eclipse, I get prompted to install Java (see attachment).
This outdated article was no help (adding environment.plist): https://developer.apple.com/library/mac/#documentation/MacOSX/Conceptual/BPRuntimeConfig/Articles/EnvironmentVars.html. I thought the problem might be $JAVA_HOME was not set, but I was wrong.
I think I got more useful information from Stack Overflow rather than the vendor (Apple), but its still not solved. https://apple.stackexchange.com/questions/58203/mountain-lion-with-java-7-only and https://apple.stackexchange.com/questions/57986/multiple-java-versions-support-on-os-x-and-java-home-location.
Please fix this. I spends thousands on Apple hardware and hundreds on Apple software, and this sort of thing is not acceptable. I have personally wasted hours on this issue, as have others. How can the Apple QA department miss another gapping hole?
From here.
JDK 7 will be installed under /Library/Java/JavaVirtualMachines/1.7.0.jdk, JDK 6 under /System/Library/Java/JavaVirtualMachines.
To trick OS X to accept Java 7 instead of proposing to install Java 6 a simple symlink is enough:
sudo mkdir /System/Library/Java/JavaVirtualMachines
sudo su ln -s /Library/Java/JavaVirtualMachines/1.7.0.jdk /System/Library/Java/JavaVirtualMachines/1.6.0.jdk
Most Java Programms will run with this little hack without the need to install Java 6.
Note that the OP in the above question specifically talks about Eclipse not working with Java 7.
Also this might be worthwhile read.
I'm rather embarrassed but one of my students helped me solve this issue.
If you have Java 7 installed then you should be using the 64 bit version of Eclipse. I had downloaded the 32 bit version and it was asking me to install Java 6 when I had version 7 installed. Downloaded the 64bit version and it works like a dream. I run Mac os 10.8
Installing this update from apple fixed it for me:
http://support.apple.com/kb/DL1572
Note that's the update that's trying to install automatically.
Can you imagine that? You have to install a JDK 1.6 to get eclipse ran properly, even if you already have jdk 1.7 installed, and set the JAVA_HOME properly.
To resolve your issue, you just need to download the jdk1.6 from http://support.apple.com/kb/DL1572?viewlocale=en_US, and install it, later you will be able to run eclipse, and you can set the JAVA_HOME to JDK1.7, and you will be able to find the JDK1.7 from eclipse "Preferences".
The MAC OS offers the Java Preferences tool under Applications.
If you don't have this tool you can edit the eclipse.ini and manually specify the JVM that you want to use.
Of course remember that Java 7 is the only Java official release for MAC and is probably not the best for developing applications. I would go for the 1.6 release but you are forced with this one due to OS restrictions if you want to stick with the standard.