Ubuntu18.04 system
Enter crontab -e as shown below:
Closing the window will generate a crontab.xx directory under /tmp/ with .crontab.swp below
You can only kill the process through ps aux and then kill pid
The reason is: Nano is installed on the server, which is similar to the vim editor. When opening the crontab file, you need to select the specified editor software;
The solution is as follows:
