A small Method for upgrading JAVA in Linux-general Linux technology-Linux programming and kernel information. The following is a detailed description. I encountered some problems at work today, that is, when I upgraded the JAVA versions of Red Hat WS 2.1 and Solaris 8 (the original version is 1.3.1, and version 1.6 is used for work ), the new version is not successfully installed. When you enter java-version, the obtained version will always be 1.3.1. Use the whereis java command to find the path containing JAVA. After deleting them, check whether the version is 1.3.1. At that time, I was depressed. I asked my colleagues "Stone" and "potato" to solve this problem. Later, I came up with another method:
Using which java, we can see that the Java environment variable points to/opt/IBMJava2-131/bin/java (with Red Hat WS 2.1) as an example, and the problem is found. Then we performed the following operations:
1. First install the new version of java, "jre-6u3-linux.bin ";
2. Enter the following command "ln-s/usr/java/jre1.6.0 _ 03/bin/java/opt/IBMJava2-131/bin/java ";
3, then will report an error, said/opt/IBMJava2-131/bi/java already exists;
4. delete/opt/IBMJava2-131/bi/java and execute Step 2 again;
5. Enter java-version and check that the version number is 1.6.
This method may not be used in all systems, but you can try it when encountering these problems.
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