In linux, how does one regularly run the sh script?

In linux, how does one regularly run the sh script? -- Linux general technology-Linux programming and kernel information. The following is a detailed description. My script is:
#! /Bin/bash
Cp-a/data/mysql/mnt/mysqldata
Tar-czvf/mnt/mysql _ $ (date + "% Y % m % d" 2.16.tar.gz/mnt/mysqldata
Rm-fr/mnt/mysqldata

Regularly let him start running at every Sunday, only once. I set it to * 3 ** 0/root/backup. sh then, when he was running, more than 40 process machines were stuck. please help me write down the command for setting the timing. Thank you.