update-alternatives

update-alternatives --config java
alternatives --config java
 
alternatives --install /usr/bin/python python /usr/bin/python3.12 1
alternatives --install /usr/bin/python python /usr/bin/python3.9 2

• alternatives –config link 특정 프로그램 버전 설정
  update-alternatives –config link
• alternatives –install link name path priority 등록
  update-alternatives –install link name path priority