ubuntu set alternative

ubuntu set alternative

添加2个make版本：
$ sudo update-alternatives --install /usr/bin/make make /usr/bin/make3.81 1010 
update-alternatives: using /usr/bin/make3.81 to provide /usr/bin/make (make) in auto mode

$ sudo update-alternatives --install /usr/bin/make make /usr/bin/make4.1 1011 
update-alternatives: using /usr/bin/make4.1 to provide /usr/bin/make (make) in auto mode

查看一下是否添加成功：
$ sudo update-alternatives --display make
make - auto mode
  link best version is /usr/bin/make4.1
  link currently points to /usr/bin/make4.1
  link make is /usr/bin/make
/usr/bin/make3.81 - priority 1010
/usr/bin/make4.1 - priority 1011

切换make版本：
$ sudo update-alternatives --config make
There are 2 choices for the alternative make (providing /usr/bin/make).

  Selection    Path               Priority   Status
------------------------------------------------------------
* 0            /usr/bin/make4.1    1011      auto mode
  1            /usr/bin/make3.81   1010      manual mode
  2            /usr/bin/make4.1    1011      manual mode

Press <enter> to keep the current choice[*], or type selection number: 1