Linux system uses crontab for the first time, cannot edit normally

When you use crontab for the first time, it appears

No crontab for root-using an empty one

"Select a editor ..." There are a few options under which you are asked to select an editor. (choose Vim) on it, I chose the second one.

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But I chose the wrong, this will encounter some trouble, there is no way to normal editing, crontab-e. What to do? The problem is as follows:

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The editing interface becomes this way, and I really don't know how to edit and change its contents.

Execute this command: Select-editor (a command for crontab) allows you to re-select it. Choose Three when you re-select

When setting crontab, you may be able to manipulate the stuff

Set default editing mode Vim/etc/profile add Export Editor=vim

Vim/etc/cron.allow, Vim/etc/cron.deny

CRONTAB-E results are stored in/var/spool/cron/crontabs

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Linux system uses crontab for the first time, cannot edit normally