There is no problem with direct execution of shell scripts. The solution to crontab scheduled execution failure

When executing a shell script (calling JavaProgramWhen you modify an Excel file), you can obtain the desired result by Sh.

However, after the crontab is scheduled to run, no new Excel file is obtained, and no log error is reported.

After checking the path, there is no problem with the File Permission. Finally, I checked it online and found that this can solve the problem:

Modify the statement executed by crontab:
15 11 * **/home/loganalysis/dealexcel. Sh>/home/loganalysis/error. log 2> & 1
To:
15 11 * ** CD/home/loganalysis/&./dealexcel. Sh>/home/loganalysis/error. log 2> & 1

However, the reason for this solution is not very clear. I hope you can explain it.