利用自带的工具update-alternatives --config
# update-alternatives --config editor
There are 4 choices for the alternative editor (providing /usr/bin/editor).
Selection Path Priority Status
------------------------------------------------------------
0 /bin/nano 40 auto mode
1 /bin/ed -100 manual mode
2 /bin/nano 40 manual mode
* 3 /usr/bin/vim.basic 30 manual mode
4 /usr/bin/vim.tiny 15 manual mode
Press <enter> to keep the current choice[*], or type selection number:3
以上我已经选择了3了，默认应该是2，看前面有个*号。