TLDR
Enter a command. For example: pidof, guix package, physlock.

update-alternatives

 
A convenient tool for maintaining symbolic links to determine default commands. More information: https://manned.org/update-alternatives.
 
  • 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

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