Linux cron作业覆盖文件

Question

如果cron作业创建具有常量名称的存档，则存档将在下一个cron作业中替换为新存档，或者因具有此名称的文件已存在而终止？

Answer 1

There's no magic in cron - it just runs a program at a given timing. If that program has the logic to check if the archive exists, it will still have it when run via as a cron job. If it just overwrites the archive, it will continue doing so when run as a cron jbo.

Answer 2

Cron just run your command, so it's up to you how this command may look. For example:

0 8 * * * rm -rf arc.zip && zip -r arc.zip /tmp

This cron runs every day at 8am and performs next steps:

1. remove file arc.zip
2. create new archive arc.zip from /tmp directory