在linux下输入 crontab -e 命令时，发现
no crontab for root - using an empty one
/bin/sh: /usr/bin/vi: No such file or directory
crontab: "/usr/bin/vi" exited with status 127
后来发现是没有下载vi编辑器，所以需要把默认编辑器改成vim
# echo "export EDITOR=vim" >> ~/.bashrc # source ~/.bashrc
然后就搞定了