tldr/pages/linux/update-alternatives.md

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# update-alternatives
> A convenient tool for maintaining symbolic links to determine default commands.
- Add a symbolic link:
`sudo update-alternatives --install {{path/to/symlink}} {{command_name}} {{path/to/command_binary}} {{priority}}`
- Configure a symbolic link for `java`:
`sudo update-alternatives --config {{java}}`
- Remove a symbolic link:
`sudo update-alternatives --remove {{java}} {{/opt/java/jdk1.8.0_102/bin/java}}`
- Display information about a specified command:
`update-alternatives --display {{java}}`
- Display all commands and their current selection:
`update-alternatives --get-selections`