# Change default java - Seafile Admin Manual
Author: seafile

# Change default java

When you have both Java 6 and Java 7 installed, the default Java may not be Java 7.

Do this by typing `java -version`, and check the output.

- If the output is like "java version "1.7.0_xx", then the default Java is Java 7, which is good.
- If the output is like "java version "1.6.0_xx", then the default Java is Java 6, we need to configure default Java to Java 7.

If the default Java is Java 6, then do

On Debian/Ubuntu:

    sudo update-alternatives --config java

On CentOS/RHEL:

    sudo alternatives --config java

The above command will ask you to choose one of the installed Java versions as default. You should choose Java 7 here.

After that, re-run `java -version` to make sure the change has taken effect.

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