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+# update-alternatives
+
+> A convenient tool for maintaining symbolic links determining default commands.
+
+- Add a symbolic link:
+
+`sudo update-alternatives --install /usr/bin/java java /opt/java/jdk1.8.0_102/bin/java 300`
+
+- Config a symbolic link:
+
+`sudo update-alternatives --config java`
+
+- Remove a symbolic link:
+
+`sudo update-alternatives --remove java /usr/bin/java`
+
+- Display information about the link group:
+
+`update-alternatives --display java`