The common user crontab task is not executed, and the common user crontab

The common user crontab task is not executed, and the common user crontab

Today, in linux, the crontab task of common users is not executed. I have searched a lot on the Internet. I 'd like to add the following content before the executed script.

If [-f ~ /. Bash_profile];
Then
.~ /. Bash_profile
Fi

It does not work after being added. I don't know if it works only when the script is executed in the user root directory.

The following content must be added at the beginning of the script.

#! /Bin/bash
# Set-x
Source ~ /. Bash_profile

The first line indicates that the script is interpreted and executed using/bin/bash.

The second line does not have

The third line is to introduce user environment variables.

Note that the script is in unix format instead of dos format.